4507 Datasheet, PDF (4/115 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4507 Group
PIN DESCRIPTION
Pin
Name
VDD
Power supply
VSS
Ground
CNVSS
CNVSS
RESET
Reset input/output
XIN
XOUT
D0–D5
System clock input
System clock output
I/O port D
P00–P03 I/O port P0
P10–P13 I/O port P1
P20, P21 I/O port P2
P30, P31 I/O port P3
Port C
I/O port C
Port K
I/O port K
CNTR
Timer input/output
INT
Interrupt input
AIN0–AIN3 Analog input
Input/Output
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.
I/O
An N-channel open-drain I/O pin for a system reset. When the watchdog timer or the
built-in power-on reset causes the system to be reset, the RESET pin outputs “L” level.
Input
Output
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.
I/O
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.
I/O
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.
I/O
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.
I/O
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.
I/O
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.
I/O
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.
I/O
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.
I/O
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.
Input
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.
Input
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.
MULTIFUNCTION
Pin
D2
D3
P12
P13
Multifunction
C
K
CNTR
INT
Pin
C
K
CNTR
INT
Multifunction
D2
D3
P12
P13
Pin
P20
P21
P30
P31
Multifunction
AIN0
AIN1
AIN2
AIN3
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.
Pin
AIN0
AIN1
AIN2
AIN3
Multifunction
P20
P21
P30
P31
Rev.3.01 2005.02.04 page 4 of 111
REJ03B0107-0301