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7542 Group
PIN DESCRIPTION
Table 2 Pin description
Pin
Name
Vcc, Vss
Power source
V
Analog refer-
REF
ence voltage
CNVss
CNVss
RESET
Reset input
X
Clock input
IN
X
Clock output
OUT
P0
(LED
)/CAP
I/O port P0
0
00
0
P0
(LED
)/CMP
1
01
0
P0
(LED
)/CMP
2
02
1
P0
(LED
)/TX
3
03
OUT
P0
(LED
)/RxD
4
04
2
P0
(LED
)/TxD
5
05
2
P0
(LED
)/S
6
06
CLK2
P0
(LED
)/S
7
07
RDY2
P1
/RxD
/CAP
I/O port P1
0
1
0
P1
/TxD
1
1
P1
/S
2
CLK1
P1
/S
3
RDY1
P1
/CNTR
4
0
P2
/AN
–P2
/AN
I/O port P2
0
0
7
7
(Note 2)
P3
(LED
)/CAP
I/O port P3
0
10
1
P3
(LED
)/CMP
(Note 3)
1
11
2
P3
(LED
)/CMP
2
12
3
P3
(LED
)/INT
3
13
1
P3
(LED
)
4
14
P3
(LED
)
5
15
P3
(LED
)/INT
6
16
1
P3
(LED
)/INT
7
17
0
Notes 1: V
= 2.4 to 5.5 V for the extended operating temperature version and the extended operating temperature 125 °C version.
CC
2: P2
/AN
and P2
/AN
do not exist for the 32-pin version and PWQN0036KA-A package, so that Port P2 is a 6-bit I/O port.
6
6
7
7
3: P3
and P3
/INT
do not exist for the 32-pin version and PWQN0036KA-A package, so that Port P3 is a 6-bit I/O port.
5
6
1
Rev.3.02
Oct 31, 2006
REJ03B0006-0302
Mask ROM version (Note 1)
FLASH ROM version
•Reference voltage input pin for A/D converter.
•Chip operating mode control pin, which is always connected to Vss.
•Reset input pin for active "L"
•Input and output pins for main clock generating circuit.
•Connect a ceramic resonator or quartz crystal oscillator between the X
•For using RC oscillator, short between the X
•If an external clock is used, connect the clock source to the X
•When the on-chip oscillator is selected as the main clock, connect X
•8-bit I/O port.
•I/O direction register allows each pin to be individually pro-
grammed as either input or output.
•CMOS compatible input level
•CMOS 3-state output structure
•Whether a built-in pull-up resistor is to be used or not can be
determined by program.
• High drive capacity for LED drive port can be selected by program.
•5-bit I/O port
•I/O direction register allows each pin to be individually pro-
grammed as either input or output.
•CMOS compatible input level
•CMOS 3-state output structure
•CMOS/TTL level can be switched for P1
•8-bit I/O port having almost the same function as P0
•CMOS compatible input level
•CMOS 3-state output structure
•8-bit I/O port
•I/O direction register allows each pin to be individually pro-
grammed as either input or output.
•CMOS compatible input level (CMOS/TTL level can be switched
for P3
and P3
).
6
7
•CMOS 3-state output structure
•Whether a built-in pull-up resistor is to be used or not can be
determined by program.
• High drive capacity for LED drive port can be selected by program.
Page 10 of 134
Function
Apply voltage of 2.2 to 5.5 V to Vcc, and 0 V to Vss.
Apply voltage of 2.7 to 5.5 V to Vcc, and 0 V to Vss.
and X
pins, and connect the capacitor and resistor.
IN
OUT
, P1
and P1
0
2
3
Function expect a port function
and X
pins.
IN
OUT
pin and leave the X
pin open.
IN
OUT
pin to V
and leave X
IN
CC
OUT
• Key-input
• Capture function pin
(key-on
• Compare function pin
wake up
interrupt
• Timer X function pin
input) pin
• Serial I/O2 function pin
• Serial I/O1 function pin
• Capture function pin
• Serial I/O1 function pin
• Timer X function pin
• Input pins for A/D converter
• Capture function pin
• Compare function pin
• Interrupt input pin
• Interrupt input pin
open.
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