4508 datasheet(4/142 Pages) RENESAS

4 / 142 page

Rev.1.02

2006.12.22

page 4 of 140

REJ03B0148-0102

4508 Group

PIN DESCRIPTION

Name

Power supply

Ground

CNVSS

Reset input/output

System clock input

I/O port D

Input is examined by

skip decision.

I/O port P0

I/O port P1

I/O port P2

Timer input/output

Interrupt input

Analog input

Serial interface clock I/O

Serial interface data output

Serial interface data input

VDD

VSS

CNVSS

RESET

XIN

D0–D3

P00–P03

P10–P13

P20, P21

CNTR0

CNTR1

INT

AIN0, AIN1,

AIN4, AIN5,

SCK

SOUT

SIN

Input/Output

—

I/O

Input

I/O

Input

I/O

Output

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 SRST instruction, watch-

dog timer, the voltage drop detection circuit (only for H version) or the built-in power-on

reset (only for H version) causes the system to be reset, the RESET pin outputs “L”

level.

I/O pins of the main clock generating circuit. When using a ceramic resonator, connect it be-

tween 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.

The output structure can be switched to N-channel open-drain or CMOS by software.

For input use, set the latch of the specified bit to “1” and select the 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 AIN4 and AIN5, respectively.

Port P0 serves as a 4-bit I/O port.

The output structure can be switched to N-channel open-drain or CMOS by software.

For input use, set the latch of the specified bit to “1” and select the N-channel open-drain.

Port P0 has a key-on wakeup function and a pull-up function. Both functions can be

switched by software.

Ports P00, P01 and P02 are also used as SIN, SOUT and SCK, respectively.

Port P1 serves as a 4-bit I/O port.

The output structure can be switched to N-channel open-drain or CMOS by software.

For input use, set the latch of the specified bit to “1” and select the 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 P11, P12 and P13 are also used as CNTR1, CNTR0 and INT, respectively.

Port P2 serves as a 2-bit I/O port.

The output structure can be switched to N-channel open-drain or CMOS by software.

For input use, set the latch of the specified bit to “1” and select the 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.

CNTR0 pin has the function to input the clock for the timer 2 event counter, and to out-

put the PWM signal generated by timer 1.

This pin is also used as port P12.

CNTR1 pin has the function to input the clock for the timer 1 event counter, and to out-

put the PWM signal generated by timer 2.

This pin is also used as port P11.

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, AIN1, AIN4, AIN5 are also used as ports P20, P21, D2 and D3, respectively.

Serial interface data transfer synchronous clock I/O pin. SCK pin is also used as port P02.

Serial interface data output pin. SOUT pin is also used as port P01.

Serial interface data input pin. SIN pin is also used as port P00.

XOUT

System clock output

Output

4508 Datasheet(PDF) 4 Page - Renesas Technology Corp

4508 Datasheet(HTML) 4 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL