ST7522 Sitronix, ST7522 Datasheet
ST7522
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ST7522 Summary of contents
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... These features give the designer a flexible means of implementing small to medium size LCD displays for compact, low power systems. The ST7522 which is able to drive 1 line of 6 Chinese characters or 2 lines of 12 Chinese characters each line with two ST7522. ...
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... ST7522 ST7522 Serial Specification Revision History Version Date 1.0 2002/01/30 New specification version 1.0a 2002/02/20 Modify cover page’s product name 1.0b 2002/03/18 Adding FR frequency for “OSC frequency set” command 1.0c 2002/07/10 Ver 1.0c Description Adding “Slave chip notice” in application circuit 1. Adding “Software example” ...
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... ST7522 Common counter CL CLS FR CAP1 CAP2 Power CAP3 circuit Ver 1.0c LCD driver circuit Display data latch circuit Display data RAM (96 X33 bits) www.DataSheet.co.kr Column address decoder Display timing Column address counter ...
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... ST7522 Chip specifications of AL pad package Chip size : 3720 µm x 5040 µm Minimum pad pitch : 110µm Pad size : 90µm X 90µm SEG73 /SEG56 1 148 147 146 145 ...
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... ST7522 (chip size : 3720 µm x 5040 µm) Pin Name Pad X Y No. Master Slave 1 SEG56 SEG73 -1745 2405 2 SEG55 SEG72 -1745 2275 3 SEG54 SEG71 -1745 2155 4 SEG53 SEG70 -1745 ...
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... Used as an enable clock input of the 68-series MPU. — If the 80-series MPU is connected Input. Active low. The RD kept low, the ST7522 data bus is in the output status. If the 68-series MPU is connected: Input. Used as an input pin of read control signals (if R/W is high) or write control — signals (if low). R ...
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... S1~S4 O Output. Static data (only use with COMS) Input. The master or slave LSI operation select pin for the ST7522 . Connected to V the slave LSI operation mode). The slave driver has the reverse common/ segment output scan sequence than the master driver for the convenience of PCB and LCD layout. ...
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... The MPU Interface Selecting the Interface Type With the ST7522 Series chips, data transfers are done through an 8-bit bi-directional data bus (D7 to D0) or through ― P/S CS1 CS2 ― H: Parallel Input CS1 CS2 ― L: Serial Input CS1 ...
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... Caution is required on the SCL signal when it comes to line-end reflections and external noise. We recommend that operation be rechecked on the actual equipment. The Chip Select The ST7522 Series chips have two chip select terminals: ― CS1 and CS2. The MPU interface or the serial interface is ― ...
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... CYC accessing the ST7522 Series. Wait time may not be considered. And, in the ST7522 Series chips, each time data is sent from the MPU, a type of pipeline process between LSIs is performed through the bus holder attached to the internal data bus. Internal data bus. ...
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... It is possible to access the desired bit by specifying the page address and the column address. Because shown in Figure 3, the display data from the MPU corresponds to the liquid crystal display common direction, there are few constraints at the time of display data transfer when multiple ST7522 series chips are ...
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... ST7522 Page Address Data ADC=0 COLUMN ADC=1 Ver 1.0c ………… c Page 0 Page 1 www ...
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... Generates common timing signals and FR frame signals from the CL basic clock. The 1/17 or l/33 duty (for ST7522 )can be selected by the Duty Select command. If the ST7522 l/33 duty is selected for the , the l/33 and l/ 17 duties are provided by two chips consisting of the master and slave chips in the common multi-chip mode. ...
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... COM1 RAM Data SEGn When multiple ST7522 Series chips are used, the slave chip must be supplied the display timing signals (FR, CL) from the master chip. Master (M/S = “H”) The internal oscillator circuit is enabled (CLS = “H”) The internal oscillator circuit is disabled (CLS = “L”) Slave (M/S = “ ...
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... ST7522 The Liquid Crystal Driver Circuits These are a 113-channel (ST7522), that generate four voltage levels for driving the liquid crystal. The combination of the display data, the COM scan signal, and the FR signal COM0 COM1 COM2 COM3 COM4 COM5 COM6 COM7 COM8 ...
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... V to the liquid crystal drive circuit. 4 1/6 bias or 1/5 bias for ST7522, can be selected. VDD-V5 maximum voltage is 7V, VDD-Vcap3 maximum voltage is 7V too. If VDD < 3. can use the Booster circuit 2x, The booster voltage can follow the spec. condition (VDD-V5 ≦ 7V max. voltage.) if VDD >3.5V only use the 1X booster circuit, that can ensure the VDD-V5 voltage ≦ 7V. If use the VDD voltage 5V and 2X booster , it’ ...
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... ST7522 The Reset Circuit ― When the RES input comes to the “L” level, these LSIs return to the default state. Their default states are as follows: 1. Display OFF 2. Static drive is turned OFF. 3. ADC select: Normal (ADC command Display all point on is select to normal 5 ...
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... ST7522 Instructions Display on/off 0 Page address set 0 Column address set upper 0 bits Column address set lower bits 0 Status read 0 Display data write ...
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... ST7522 Instructions Electronic contrast set 0 1 OSC Frequency set 0 1 Follower input voltage set 0 1 Follower amplified ratio 0 1 Booster input voltage set ...
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... See the Table of ST7522 instructions. The ST7522 series identifies a data bus using a combination of A0 and R/W (RD signals. As the MPU translates a command in the internal timing only (independent from the external clock), its speed is very high. The busy check is usually not required. Display ON/FF ― ...
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... ST7522 Set Column Address This command specifies a column address of the display data RAM. When the display data RAM is accessed by the MPU continuously, the column address is incremented by I each time it is accessed from the set address. Therefore, the MPU can access to data continuously. The column address stops to be incremented at address 95, and the page address is not changed continuously. ― ...
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... ST7522 Write Display Data ― ― Writes 8-bits of data into the display data RAM location specified by the contents of the column address and page, address registers and then increments the column address register by one. Read Display Data ― ...
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... ST7522 Display Normal/Reverse ― ― This command can reverse the lit and unlit display without overwriting the contents of the display data RAM(with ICON). When this is done. the display data RAM contents are maintained . R=1: Reverse R=0: Normal(default) Display All Points ON/OFF ― ...
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... ST7522 Read-Modify-Write ― ― This command defeats column address register auto-increment after data reads. The current contents of the column Address register are saved. The mode remains active until an End command is received. When the End command is entered, the column address is returned to the one used during input of Read-Modify-Write Command ...
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... ST7522 Select Duty ― ― U=1: 1/33 duty cycle (When double chip was be used, then both chip must set duty together ) U=0: 1/17 duty cycle (default) LCD bias set ― ― I=1:1/5 bias I=0:1/6 bias (default) Reset ― ― ...
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... Vcap3 connect to V5 Open V1~V5 connect to external resistor Used Vcap3 connect to external power supply Open V1~V5 connect to external resistor used Booster and follower on/off condition table www.DataSheet.co. Vcap3 (ST7522 Side) 26/ |Vcap3-V5|>0.5V(minimum) 2002/07/10 Datasheet pdf - http://www.DataSheet4U.net/ ...
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... ST7522 The Electronic Volume (Double Byte Command) This command makes it possible to adjust the brightness of the liquid crystal display by controlling the liquid crystal drive voltage V5. This command is a two byte command used as a pair with the electronic volume mode set command and the electronic volume register set command, and both commands must be issued one after the other ...
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... ST7522 OSC frequency set(Double Byte Command) This command is designed for frame frequency adjustment, which can provide about 50% variation of frame frequency to avoid the interference with the frequency of daylight lamp in different countries. This command is a two byte command used as a pair with the OSC frequency mode set command and the OSC frequency register set command, and both commands must be issued one after the other ...
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... ST7522 Follower input voltage set(Double Byte Command) V5 amplifier input voltage can be set by this command, which provide coarse adjustment only. This command needs to be used with the electric volume control command in order to get correct V5 output. This command is a two byte command used as a pair with the follower input voltage mode set command and the follower input voltage register set command, and both commands must be issued one after the other ...
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... ST7522 The V5 level be generate by OPAmp with VDD-Vcap3 power supply, so that V5 level must to be smaller than Vcap3 over –0.5V. Fine adjustment must to used EC[5:0] adjust of Electronic contrast set command. Coarse adjustment must to used jvref[1:0] adjust of Follower input voltage set command. For V5 voltage level setup formula: ...
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... ST7522 Booster input voltage set (Double Byte Command) This command is designed to select different level of the input voltage to booster application system, it’s better to reduce the input voltage of booster to make sure that the output voltage of booster will not be over the specification range of VDD-Vcap3 ...
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... ST7522 Reference circuit examples: When used 2x step-up voltage circuit, the “Power control” command must set to 2DH and adjust “Booster input voltage set” command of Vcap3’s full range. When used 1x step-up voltage circuit, the “Power control” command must set to 29H; the “Booster input voltage set” command is not action at this operation ...
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... ST7522 Static Indicator (Double Byte Command) This command controls the static drive system indicator display. The static indicator display is controlled by this command only, and is independent of other display control commands. This is used when one of the static indicator liquid crystal drive electrodes is connected to the COMS terminal, and the other is connected to the S1~S4 terminal ...
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... ST7522 Power Save (Compound Command) When the display all points ON is performed while the display is in the OFF mode, the power saver mode is entered, thus greatly reducing power consumption. The power saver mode has two different modes: the sleep mode and the standby mode. When all static indicator is OFF the sleep mode that is entered ...
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... Condition: 1. VDD=5.0V 2. Use Winbond W78E52-40 at 16MHz crystal(compatible intel 8051 MPU) 3. Use Mater and Slave mode(ST7522D |VCAP3|=(5x2)x3/5=6V 5. |V5|=[600KΩ/(1MΩ+200KΩ)]x2x5=5V ;Reset CLR RES CALL DELAY SETB RES CALL DELAY ;------------------------------------------------------------------------------------------------------------------------------------------------------------------- ;Initial LCD ...
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... ST7522 Characteristics Symbol Power supply voltage V LCD driver voltage Vcap3 Input voltage V Operating temperature T Storage temperature T STO ...
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... Item Symbol V =3 ST7522 =5 Item Symbol V =3 ST7522 =5 • Consumption Current at Time of Power Saver Mode, VSS = 0 V, VDD = 3.0 V ± 10% Item Symbol Sleep mode I DD Standby Mode I DD References for items market with * *1 While a broad range of operating voltages is guaranteed, performance cannot be guaranteed if there are sudden fluctuations to the voltage while the MPU is being accessed ...
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... ST7522 Interface A0 R/W tAW6 CS1 CS2 (Write (Read) Item Signal Address hold time A0 Address setup time A0 System cycle time A0 Data setup time Data hold time ...
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... ST7522 80 Interface A0 tAW8 CS1 CS2 WR, (Write (Read) Item Signal Address hold time A0 Address setup time System cycle time A0 — — Control L pulse width ( — — Control L pulse width ( — — Control H pulse width ( — — Control H pulse width (RD ...
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... ST7522 Serial Interface CS1 CS2 A0 SCL SI Item Signal Serial Clock Period SCL SCL “H” pulse width SCL “L” pulse width Address setup time A0 Address hold time Data setup time SI Data hold time CS-SCL time CS *1 All timing is specified using 20% and 80 Ver 1 ...
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... ST7522 Reset Timing RES Internal status Item Signal Reset time — Reset “L” pulse width RES *1 When double chip was be used, then the duty set command must be set between the Ver 1. During reset Figure 41 Table 36 Symbol Condition t — ...
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... ST7522 VDD VDD Pull up control VDD I/O PAD VSS VDD VSS VSS I/O PAD:D0,D1,D2,D3,D4,D5 VDD VDD Input PAD VSS VSS Input PAD: RES,P/S,/CS1,CS2,CLS, E(/RD),R/W(/WR),A0,C86,M/S Ver 1. ...
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... The ST7522 Series can be connected to either 80x86 Series MPUs or to 68000 Series MPUs. Moreover, using the serial interface it is possible to operate the ST7522 series chips with fewer signal lines. The display area can be enlarged by using multiple ST7522 Series chips. When this is done, the chip select signal can be used to select the individual ICs to access. ...
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... ST7522 Condition time booster 2. internal follower 3. internal OSC frequency SEG73 1 SEG72 2 SEG71 3 SEG70 4 SEG69 5 SEG68 6 SEG67 7 SEG66 8 SEG65 9 SEG64 10 SEG63 11 SEG62 12 SEG61 13 SEG60 14 SEG59 15 SEG58 ...
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... C2 45/45 44 SEG13 43 SEG14 42 SEG15 41 SEG16 40 SEG17 39 SEG18 38 SEG19 3 SEG20 36 SEG21 35 SEG22 34 SEG23 33 SEG24 32 SEG25 31 SEG26 30 SEG27 29 SEG28 28 SEG29 27 SEG30 26 SEG31 25 ST7522 SEG32 24 SEG33 23 SEG34 22 SEG35 21 SEG36 20 SEG37 19 SEG38 18 SEG39 17 SEG40 16 SEG41 15 SEG42 14 SEG43 13 SEG44 12 SEG45 11 SEG46 10 SEG47 9 SEG48 8 SEG49 7 SEG50 6 SEG51 5 ...