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TC94A23F Datasheet(PDF) 7 Page - Toshiba Semiconductor |
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TC94A23F Datasheet(HTML) 7 Page - Toshiba Semiconductor |
7 / 20 page TC94A23F 2002-02-06 7 Pin Number Symbol Pin Name Function and Operation Remarks 21~24 P1-0~P1-3 I/O port 1 4-bit CMOS I/O port. Input/output can be set for each bit by program. The pins can be set to be pulled-up or pulled-down by program. Thus, they can be used as key input pins. When the pins are set to I/O port input, Clock Stop mode and Wait mode can be released, according to the change in input to the pins. 25 P3-0 I/O port 3 26~28 P3-1/ADin1 ~ P3-3/ADin3 I/O port 3 /A/D analog voltage input 29 P4-0/ADin4 /BUZR I/O port 4 /A/D analog voltage input/buzzer output 5-bit CMOS I/O port. Input/output can be set for each bit by program. P3-1 and P4-0 pins are also used as built-in 6-bit 4-channel A/D converter analog input pins. The built-in A/D converter uses successive approximation. The conversion time is 6 instruction cycles (280 ms) when the 75 kHz crystal oscillator is used; 198 ms when the 4.5 MHz crystal oscillator is used; 180 ms when the 16.9344 MHz crystal oscillator is used. A/D analog input can be set for each pin by program. The internal power supply (MVDD) is used as the reference voltage. The P4-0 pin is also used as the buzzer output pin. One of four frequencies: 0.75, 1, 1.5, and 3 kHz, can be selected for buzzer output. The buzzer is output at the selected frequency in one of four modes: Continuous, single-shot, 10 Hz intermittent, and 10 Hz intermittent at 1 Hz interval. Settings for the A/D converter and buzzer, and their control can be performed by program. 33 P2-0/EMPHin 34 P2-1/ HSO in 35 P2-2/LRCKin 36 P2-3/DATAin I/O port 2 /1-bit DAC input 37 IN1/BCKin 89 IN2/ (VPP) General-purpose input port/1-bit DAC input (VPP input) I/O port 2 is a 4-bit CMOS I/O port. IN1 and IN2 are a 2-bit general-purpose input port. Input/output can be set for each bit of I/O port 2 by program. I/O port 2 and the IN1 pins can be switched to 1-bit DAC input pins by the CD command to support shock-proofing. In this case, the I/O port must be set to input. With the OTP version, the IN2 pin is also used as the program power supply pin. MVDD MVDD RIN1 MVDD MVDD To A/D converter Input instruction MVDD MVDD MVDD |
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