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M34501E4FP Datasheet(PDF) 5 Page - Renesas Technology Corp |
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M34501E4FP Datasheet(HTML) 5 Page - Renesas Technology Corp |
5 / 116 page 4501 Group Rev.3.01 2005.02.07 page 5 of 112 REJ03B0104-0301 PIN DESCRIPTION Name Power supply Ground CNVSS Reset input/output System clock input I/O port D I/O I/O port P1 I/O port P2 I/O port C I/O port K Timer input/output Interrupt input Analog input Pin VDD VSS CNVSS RESET XIN D0–D3 P00–P03 P10–P13 P20, P21 Port C Port K CNTR INT AIN0–AIN1 Input/Output — — — I/O Input I/O I/O I/O I/O I/O I/O I/O Input Input Function Connected to a plus power supply. Connected to a 0 V power supply. Connect CNVSS to VSS and apply “L” (0V) to CNVSS certainly. An N-channel open-drain I/O pin for a system reset. When the watchdog timer, the built-in power-on reset or the voltage drop detection circuit causes the system to be reset, the RESET pin outputs “L” level. I/O pins of the system clock generating circuit. When using a ceramic resonator, connect it between pins XIN and XOUT. A feedback resistor is built-in between them. When using the RC oscillation, connect a resistor and a capacitor to XIN, and leave XOUT pin open. Each pin of port D has an independent 1-bit wide I/O function. Each pin has an out- put latch. For input use, set the latch of the specified bit to “1.” Input is examined by skip decision. The output structure is N-channel open-drain. Ports D2 and D3 are equipped with a pull-up function and a key-on wakeup function. Both functions can be switched by software. Ports D2 and D3 are also used as ports C and K, respectively. Port P0 serves as a 4-bit I/O port, and it can be used as inputs when the output latch is set to “1.” The output structure is N-channel open-drain. Port P0 has a key-on wakeup function and a pull-up function. Both functions can be switched by software. Port P1 serves as a 4-bit I/O port, and it can be used as inputs when the output latch is set to “1.” The output structure is N-channel open-drain. Port P1 has a key-on wakeup function and a pull-up function. Both functions can be switched by software. Ports P12 and P13 are also used as CNTR and INT, respectively. Port P2 serves as a 2-bit I/O port, and it can be used as inputs when the output latch is set to “1.” The output structure is N-channel open-drain. Port P2 has a key-on wakeup function and a pull-up function. Both functions can be switched by software. Ports P20 and P21 are also used as AIN0 and AIN1, respectively. 1-bit I/O port. Port C can be used as inputs when the output latch is set to “1.” The output structure is N-channel open-drain. Port C has a key-on wakeup function and a pull-up function. Both functions can be switched by software. Port C is also used as port D2. 1-bit I/O port. Port K can be used as inputs when the output latch is set to “1.” The output structure is N-channel open-drain. Port K has a key-on wakeup function and a pull-up function. Both functions can be switched by software. Port K is also used as port D3. CNTR pin has the function to input the clock for the timer 2 event counter, and to out- put the timer 1 or timer 2 underflow signal divided by 2. This pin is also used as port P12. INT pin accepts external interrupts. It has the key-on wakeup function which can be switched by software. This pin is also used as port P13. A/D converter analog input pins. AIN0 and AIN1 are also used as ports P20 and P21, respectively. Notes 1: Pins except above have just single function. 2: The input/output of D2, D3, P12 and P13 can be used even when C, K, CNTR (input) and INT are selected. 3: The input of P12 can be used even when CNTR (output) is selected. 4: The input/output of P20, P21 can be used even when AIN0, AIN1 are selected. Pin D2 D3 P12 P13 Multifunction C K CNTR INT MULTIFUNCTION Pin C K CNTR INT Multifunction D2 D3 P12 P13 Pin P20 P21 Multifunction AIN0 AIN1 Pin AIN0 AIN1 Multifunction P20 P21 XOUT System clock output Output |
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