4502 datasheet(4/116 Pages) RENESAS

4 / 116 page

Rev.3.01

2005.02.02

page 4 of 112

REJ03B0105-0301

4502 Group

PIN DESCRIPTION

Name

Power supply

Ground

CNVSS

Reset input/output

System clock input

I/O port D

I/O port P0

I/O port P1

I/O port P2

I/O port P3

I/O port C

I/O port K

Timer input/output

Interrupt input

Analog input

VDD

VSS

CNVSS

RESET

XIN

D0–D5

P00–P03

P10–P13

P20, P21

P30, P31

Port C

Port K

CNTR

INT

AIN0–AIN3

Input/Output

—

I/O

Input

I/O

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.

Port P3 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. Ports P30 and P31 are

also used as AIN2 and AIN3, 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. AIN2 and AIN3 are also used as ports P30 and P31, 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, P30 and P31 can be used even when AIN0, AIN1, AIN2 and AIN3 are selected.

P12

P13

Multifunction

CNTR

INT

MULTIFUNCTION

CNTR

INT

Multifunction

P12

P13

P20

P21

P30

P31

Multifunction

AIN0

AIN1

AIN2

AIN3

AIN0

AIN1

AIN2

AIN3

Multifunction

P20

P21

P30

P31

XOUT

System clock output

Output

4502 Datasheet(PDF) 4 Page - Renesas Technology Corp

4502 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