PT7C4302 PERICOM [Pericom Semiconductor Corporation], PT7C4302 Datasheet
PT7C4302
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PT7C4302 Summary of contents
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... Battery backup PT0225(11/05) Real-time Clock Module (3-wire Interface) Description The PT7C4302 serial real-time clock is a low- power clock/calendar with a programmable square-wave output and 31 bytes of nonvolatile RAM. Address and data are transferred serially via a 3- wire bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information ...
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... Real-time Clock Module (3-wire Interface) PT7C4302 Time Counter (Sec,Min,Hour,Day,Date,Month,Year) Address Address Decoder Register Shift Registers PT7C4302 PT7C4307 X1 X2 Guard Ring (connect to gound) Min Typ 32.768 6 2 Data Sheet PT7C4302 RAM SCLK I /O Interface RST (3-wires) I/O Max Unit kHz 45 kΩ pF Ver: 0 ...
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... Pin Configuration Pin Description Pin no. Pin Type 1 VCC2 P Primary power. When VCC2 is greater than VCC1 + 0.2V, VCC2 will power the PT7C4302 Oscillator Circuit Input. Together with X2, 32.768kHz crystal is connected between them Oscillator Circuit Output. Together with X1, 32.768kHz crystal is connected between them. ...
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... R1 between VCC2 and VCC1. The maximum current IMAX would, therefore, be calculated as follows: IMAX = (5.0V - diode drop)/R1 _ (5.0V - 0.7V) / 2kΩ _ 2.2mA As the super cap charges, the voltage drop between VCC1 and VCC2 will decrease and, therefore, the charge current will decrease. PT0225(11/05) Real-time Clock Module (3-wire Interface) 4 Data Sheet PT7C4302 Ver: 0 ...
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... RAM burst Caution points: *1. PT7C4302 uses 5 bits for address. It’s address byte consists RAM/Clock select bit +5-bit addr. + Read/Write select bit. *2. Oscillator Enable bit. When this bit is set to 1, oscillator is stopped but time count chain is still active. *3. WP: Write Protect bit. WP bit should be cleared before attempting to write to the device. ...
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... D5 D4 S40 S20 S10 Undefined Undefined Undefined Undefined Undefined Undefined Undefined M40 M20 M10 Undefined Undefined Undefined Undefined Undefined Undefined Undefined 0 H20 or P,/A H10 0 Undefined Undefined Undefined Undefined Undefined Undefined 6 Data Sheet PT7C4302 Default ...
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... Data Sheet PT7C4302 24-hour clock 12-hour clock ...
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... D4 0 D20 D10 0 Undefined Undefined Undefined Undefined Undefined Undefined 0 0 M10 0 0 Undefined Undefined Undefined Undefined Undefined Y40 Y20 Y10 TCS TCS TCS Description 8 Data Sheet PT7C4302 ...
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... The command byte is shown in Figure 1. Each data transfer is initiated by a command byte. The MSB (Bit 7) must be a logic writes to the PT7C4302 will be disabled. Bit 6 specifies clock/calendar data if logic 0 or RAM data if logic 1. Bits 1 through 5 specify the designated registers to be input or output, and the LSB (bit 0) specifies a write operation (input) if logic 0 or read operation (output) if logic 1 ...
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... Note that the first data bit to be transmitted occurs on the first falling edge after the last bit of the command byte is written. Additional SCLK cycles will transmit the same data bytes by PT7C4302 so long as RST remains high. This operation permits continuous burst mode read capability. Also, the SDA pin is tri-stated upon each rising edge of SCLK. Data is output starting with bit 0 ...
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... The RAM command byte specifies burst mode operation. In this mode, the 31 RAM registers can be consecutively read or written starting with bit 0 of address 0. Note: PT7C4302 use 94H, 96H as test mode address. Customer should not use the address. Maximum Ratings Storage Temperature.......................................................................................................................-65 o Cto +150 o C Ambient Temperature with Power Applied ...
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... CC1 I = 1.5mA I 4.0mA -0.4mA I -1.0mA /RST, SCLK Note 3 I/O Note 5V; SCLK = 500kHz Data Sheet PT7C4302 Min Typ Max 2 0.4 CC1 1.2 CC1 0.5 - CC1 CC1 100 - CC1 100 ...
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... CC V =2. = =2.0V 240 =2. = =2. = =2. = Data Sheet PT7C4302 Max Unit Notes 800 ns 1,2,3 200 0.5 kHz 1 2.0 2000 ns 1 500 µ µs 1 280 280 Ver: 0 ...
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... PT0225(11/05) Real-time Clock Module (3-wire Interface) 6.09 7.11 .008 .014 0.20 0.35 .210 Max 5.33 SEATING PLANE DENOTES DIMENSIONS X.XX IN MILLIMETERS X.XX 0.381 Note: 1) Controlling dimensions in inches. 2) Ref: JDDEC MS-001 BA 0.558 14 Data Sheet PT7C4302 7.62 8.25 .300 .325 0° 15° .430 Max 10.92 Ver: 0 ...
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... BSC .0098 1.27 .013 0.330 .020 0.508 PT0225(11/05) Real-time Clock Module (3-wire Interface) 3.78 3.99 0-8° SEATING PLANE X.XX X.XX 0.10 0.25 Note: 1) Controlling dimensions in millimeters. 2) Ref: JDDEC MS-012 AA 15 Data Sheet PT7C4302 .0099 0.25 x 45° .0196 0.50 0.19 .0075 0.25 .0098 0.40 .016 1.27 .050 .2284 .2440 5.80 6.20 DENOTES DIMENSIONS IN MILLIMETERS Ver: 0 ...
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... Pericom Technology product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom Technology Incorporation. PT0225(11/05) Real-time Clock Module (3-wire Interface) Notes Pericom Technology Inc. Fax: (86)-21-6485 2181 Fax: (852)- 2243 3667 Fax: (1)-408-435 1100 16 Data Sheet PT7C4302 Ver: 0 ...