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TC9328AF 数据表(PDF) 4 Page - Toshiba Semiconductor |
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TC9328AF 数据表(HTML) 4 Page - Toshiba Semiconductor |
4 / 84 page TC9328AF 2004-09-13 4 Description of Pin Function Pin No. Symbol Pin Name Function and Operation Remarks 1 COM1/OT1 2 COM2/OT2 3 COM3/OT3 4 COM4/OT4 LCD common output/Output port Output common signals to LCD panels. Through a matrix with pins S1 to S22, a maximum 88 segments can be displayed. Three levels, VLCD, VEE, and GND, are output at 62.5 Hz every 2 ms. VEE is output after system reset and CLOCK STOP are released, and a common signal is output after the DISP OFF bit is set to “0”. These pins can be programmed as output ports (Note 1). 5~18 S1/OT5~ S14/OT18 LCD segment output/Output port 19~26 P8-0/S15~ P9-3/S22 LCD segment output/ I/O port Segment signal output pins for LCD panel. Together with COM1 to COM4, a matrix is formed that can display a maximum of 88 segments. All pins from S1 to S14 can be programmed as output ports (Note), and all pins from S15 to S22 as I/O ports, in units of pins. When the pins function as output ports, VLCD pin potential and GND potential are output to them. When the pins function as I/O ports, drain output is N-ch open. Because power is supplied from VLCD for the I/O ports, up to VLCD voltage (3 V) can be applied. These data ports (OT1 to OT18) are incremented by 1 by instruction every time data are accessed. Therefore, they can be used for external memory address signals, facilitating data access. Note: After system reset, the output port pins are set to LCD output, the I/O port pins to I/O port input. 27~30 P1-0~P1-3 I/O port 1 The input and output of these 4-bit I/O ports can be programmed in 1-bit units. These pins can be programmed to be pulled up or down. Thus, they can be used as key input pins. By altering the input of I/O ports set to input, the CLOCK STOP mode or the WAIT mode can be released, and the MUTE bit of the MUTE pin can be set to “1”. Note 1: When the LCD pin is set as an output port, the “H” level output is the doubled voltage VLCD. Therefore, disconnect the voltage doubler boosting capacitor but connect the VLCD pin to the VDD pin. VLCD VEE VLCD VDD VDD RIN1 VDD Input instruction VLCD VDD |
类似零件编号 - TC9328AF |
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类似说明 - TC9328AF |
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