PCF8576 Philips Semiconductors, PCF8576 Datasheet
PCF8576
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PCF8576 Summary of contents
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... DATA SHEET PCF8576 Universal LCD driver for low multiplex rates Product specification Supersedes data of 1997 Nov 18 File under Integrated Circuits, IC12 INTEGRATED CIRCUITS 1998 Feb 06 ...
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... Subaddress counter 6.14 Output bank selector 6.15 Input bank selector 6.16 Blinker 1998 Feb 06 7 CHARACTERISTICS OF THE I 7.1 Bit transfer 7.2 START and STOP conditions 7.3 System configuration 7.4 Acknowledge 2 7.5 PCF8576 I C-bus controller 7.6 Input filters 2 7.7 I C-bus protocol 7.8 Command decoder 7.9 Display controller 7.10 Cascaded operation 8 LIMITING VALUES 9 HANDLING 10 DC CHARACTERISTICS ...
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... Compatible with chip-on-glass technology Manufactured in silicon gate CMOS process. 2 GENERAL DESCRIPTION The PCF8576 is a peripheral device which interfaces to almost any Liquid Crystal Display (LCD) with low multiplex rates. It generates the drive signals for any static or multiplexed LCD containing up to four backplanes and segments and can easily be cascaded for larger LCD applications ...
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... SDA Fig.1 Block diagram (for VSO56 package; SOT190-1). BP0 BP2 BP1 BP3 BACKPLANE DISPLAY SEGMENT OUTPUTS OUTPUTS LCD VOLTAGE SELECTOR PCF8576 INPUT BANK SELECTOR DISPLAY CONTROLLER COMMAND DECODER 10 SA0 S0 to S39 DISPLAY LATCH SHIFT REGISTER DISPLAY OUTPUT ...
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... C-bus serial clock input 3 cascade synchronization input/output 4 external clock input/output 5 supply voltage 6 oscillator input 2 I C-bus subaddress inputs C-bus slave address input; bit 0 11 logic ground 12 LCD supply voltage LCD backplane outputs LCD segment outputs 5 Product specification PCF8576 DESCRIPTION ...
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... BP1 15 42 S25 BP3 16 41 S24 S23 S22 S21 S20 S19 S18 S17 S16 S15 S14 S10 27 30 S13 S11 28 29 S12 MBK278 Fig.2 Pin configuration; SOT190-1. 6 Product specification PCF8576 ...
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... Universal LCD driver for low multiplex rates 6 FUNCTIONAL DESCRIPTION The PCF8576 is a versatile peripheral device designed to interface to any microprocessor/microcontroller to a wide variety of LCDs. It can directly drive any static or multiplexed LCD containing up to four backplanes and segments. The display configurations possible with the PCF8576 depend on the number of active backplane outputs required ...
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... Philips Semiconductors Universal LCD driver for low multiplex rates 6.1 Power-on reset At power-on the PCF8576 resets to a starting condition as follows: 1. All backplane outputs are set All segment outputs are set The drive mode ‘ multiplex with 4. Blinking is switched off. 5. Input and output bank selectors are reset (as defined in Table 5) ...
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... LCD. Backplane and segment drive waveforms for this mode are shown in Fig.4. 6.4 MULTIPLEX DRIVE MODE When two backplanes are provided in the LCD, the multiplex mode applies. The PCF8576 allows use bias or bias in this mode as shown in Figs 5 and ...
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... V LCD )/2 DD LCD V LCD LCD LCD (a) waveforms at driver (b) resultant waveforms at LCD segment 10 Product specification PCF8576 LCD segments state 1 state 2 MBE540 1 bias ( LCD ...
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... LCD (a) waveforms at driver (b) resultant waveforms at LCD segment 11 Product specification PCF8576 LCD segments state 1 state 2 MBE541 1 bias ( LCD ...
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... (a) waveforms at driver / (b) resultant waveforms at LCD segment 12 Product specification PCF8576 LCD segments state 1 state 2 MBE542 = LCD ...
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... Fig.8 Waveforms for the multiplex drive mode (V 1998 Feb 06 T frame (a) waveforms at driver (b) resultant waveforms at LCD segment = Product specification PCF8576 LCD segments state 1 state – state1 S BP0 n V 0.577V = on(rms) ...
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... LCD state. 1998 Feb 06 6.6 The timing of the PCF8576 organizes the internal data flow of the device. This includes the transfer of display data from the display RAM to the display segment outputs. In cascaded applications, the synchronization signal SYNC maintains the correct timing relationship between ...
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... RAM are time-multiplexed with BP1, BP2 and BP3 respectively. When display data is transmitted to the PCF8576 the display bytes received are stored in the display RAM in accordance with the selected LCD drive mode. ...
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... BANK SELECT command. The input bank selector functions independent of the output bank selector. 6.16 Blinker The display blinking capabilities of the PCF8576 are very versatile. The whole display can be blinked at frequencies selected by the BLINK command. The blinking frequencies are integer multiples of the clock frequency; the ratios ...
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... Table 4 Blinking frequencies BLINKING MODE Off 0.5 Hz 1998 Feb 06 NORMAL OPERATING POWER-SAVING MODE MODE RATIO f clk --------------- - 92160 f clk ------------------- - 184320 f clk ------------------- - 368640 17 Product specification PCF8576 NOMINAL BLINKING RATIO FREQUENCY blinking off f clk 2 Hz --------------- - 15360 f clk 1 Hz --------------- - 30720 f clk 0.5 Hz --------------- - 61440 ...
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Acrobat reader. white to force landscape pages to be ... drive mode LCD segments LCD backplanes BP0 f S ...
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... The I C-bus protocol is shown in Fig.16. The sequence is initiated with a START condition (S) from the I master which is followed by one of the two PCF8576 slave addresses available. All PCF8576s with the corresponding SA0 level acknowledge in parallel with the slave address but all PCF8576s with the alternative SA0 level ignore the ...
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... Both data pointer and subaddress counter are automatically updated and the data is directed to the intended PCF8576 device. The acknowledgement after each byte is made only by the (A0, A1 and A2) addressed PCF8576. After the last display 2 byte, the I C-bus master issues a STOP condition (P). ...
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... BY RECEIVER SCL FROM MASTER 1998 Feb 06 SLAVE SLAVE TRANSMITTER/ RECEIVER RECEIVER Fig.14 System configuration START condition Fig.15 Acknowledgement on the I 21 Product specification PCF8576 MASTER MASTER TRANSMITTER/ TRANSMITTER RECEIVER MGA807 not acknowledge acknowledge 8 9 clock pulse for acknowledgement MBC602 2 C-bus. ...
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... COMMAND 0 1 byte n 1 byte(s) 2 Fig.16 I C-bus protocol. MSB C REST OF OPCODE Fig.17 General format of command byte. 22 Product specification acknowledge by A0, A1 and A2 selected PCF8576 only A DISPLAY DATA byte(s) update data pointers and if necessary, subaddress counter MBK279 LSB MSA833 PCF8576 ...
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... Philips Semiconductors Universal LCD driver for low multiplex rates Table 5 Definition of PCF8576 commands COMMAND OPCODE MODE SET LOAD DATA POINTER DEVICE SELECT BANK SELECT BLINK Table 6 MODE SET option 1 ...
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... PCF8576 to assert SYNC. The timing relationship between the backplane waveforms and the SYNC signal for the various drive modes of the PCF8576 are shown in Fig.19. For single plane wiring of packaged PCF8576s and chip-on-glass cascading, see Chapter 12. ...
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... LCD 5 12 SDA SCL 2 PCF8576 SYNC 3 13, 15 CLK 4 14, 16 OSC SA0 V Fig.18 Cascaded PCF8576 configuration. 25 Product specification PCF8576 40 segment drives LCD PANEL (up to 2560 elements) BP0 to BP3 11 (open-circuit) 40 segment drives 4 backplanes BP0 to BP3 MBK280 SS ...
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... Excessive capacitive coupling between SCL or CLK and SYNC may cause erroneous synchronization. If this proves problem, the capacitance of the SYNC line should be increased (e. external capacitor between SYNC and V be countered by an external pull-up resistor. Fig.19 Synchronization of the cascade for the various PCF8576 drive modes. 1998 Feb 06 1 ...
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... HANDLING Inputs and outputs are protected against electrostatic discharge in normal handling. However totally safe desirable to take normal precautions appropriate to handling MOS devices (see “Handling MOS Devices” ). 1998 Feb 06 PARAMETER current 27 Product specification PCF8576 MIN. MAX. UNIT 0.5 +11 11.0 V ...
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... Product specification MIN. TYP C-bus inactive. PCF8576 MAX. UNIT 180 0. 0. 150 A 150 k 1 ...
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... S0 to S39 Fig.20 Test loads. 29 CONDITIONS MIN. TYP. 125 200 see Fig.20 DD 4.7 4.0 4.7 4.7 4.0 250 0 4.0 1.5 k SDA SCL (2%) MBE544 Product specification PCF8576 MAX. UNIT 288 kHz 48 kHz s s 400 100 0.3 s 400 ...
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... SCL SDA MGA728 1998 Feb clk t clkH t clkL t PSYNC t PSYNC t SYNCL t PLCD Fig.21 Driver timing waveforms. t LOW t t HD;DAT t r HD;STA t SU;STA 2 Fig.22 I C-bus timing waveforms. 30 Product specification PCF8576 0.7V DD 0.3V DD 0.7V DD 0. 0.5 V MBE545 SU;DAT t HIGH t SU;STO ...
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... LCD amb Fig. function of f LCD 50 I LCD ( external clock nominal frequency. clk Fig. function of V LCD PCF8576 MBE529 200 (Hz) frame . frame MBE527 - ( ...
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... C. LCD amb Fig. function of V O(max) 1998 Feb 06 MBE532 - 1 R O(max ( Product specification PCF8576 2.5 2.0 1.5 1.0 0 LCD Fig. function of T O(max) MBE526 120 o T amb ( C) . amb ...
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... BP2 14 PCF8576T BP1 15 BP3 S10 27 S11 28 S0 S10 S11 backplanes Fig.29 Single plane wiring of packaged PCF8576Ts. 56 S39 1 55 S38 2 54 S37 3 53 S36 4 52 S35 5 51 S34 6 50 S33 7 49 S32 8 48 S31 9 47 ...
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... All of this is facilitated by the PCF8576 bonding pad layout (see Fig.30). Pads needing bus interconnection between all PCF8576s of the cascade are CLK, SCL, SDA and SYNC. These ...
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... S32 1900 S33 865 1900 S34 645 1900 S35 445 1900 S36 245 1900 S37 45 1900 S38 155 1900 S39 35 Product specification PCF8576 PAD 355 1900 30 555 1900 31 755 1900 32 955 1900 33 1155 1900 34 1375 1900 35 1375 1660 ...
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... REFERENCES JEDEC EIAJ detail 1.6 1.45 2.25 0.2 0.1 1.4 1.30 0.063 0.057 0.008 0.004 0.089 0.055 0.051 EUROPEAN PROJECTION Product specification PCF8576 SOT190 ( 0.90 0.1 0. 0.035 0.004 0.022 ISSUE DATE 96-04-02 97-08-11 ...
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... Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds 300 C. When using a dedicated tool, all other leads can be soldered in one operation within seconds between 270 and 320 C. 37 Product specification PCF8576 ...
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... Philips. This specification can be ordered using the code 9398 393 40011. 1998 Feb 06 C COMPONENTS 2 C components conveys a license under the Philips’ system provided the system conforms to the I 38 Product specification PCF8576 2 C patent to use the 2 C specification defined by ...
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... Philips Semiconductors Universal LCD driver for low multiplex rates 1998 Feb 06 NOTES 39 Product specification PCF8576 ...
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... Tel. +46 8 632 2000, Fax. +46 8 632 2745 Switzerland: Allmendstrasse 140, CH-8027 ZÜRICH, Tel. +41 1 488 2686, Fax. +41 1 481 7730 Taiwan: Philips Semiconductors, 6F, No. 96, Chien Kuo N. Rd., Sec. 1, TAIPEI, Taiwan Tel. +886 2 2134 2865, Fax. +886 2 2134 2874 Thailand: PHILIPS ELECTRONICS (THAILAND) Ltd., 209/2 Sanpavuth-Bangna Road Prakanong, BANGKOK 10260, Tel ...