7220 Datasheet, PDF (25/303 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

OVERVIEW
1.3 Pin description
1.3 Pin description
The pin description is shown in Table 1.3.1.
M37220M3-XXXSP/FP
Refer to “CHAPTER 4. M37220M3-XXXSP/FP.”
Table 1.3.1 Pin description (1)
Input/
Pin
Name
Output
Functions
VCC,
Power source
Apply voltage of 5 V ± 10 % (typical) to VCC, and 0 V to VSS.
VSS
CNVSS
______
RESET
CNVSS
Reset input
Connected to VSS.
Input To enter the reset state, the reset input pin must be kept at a “L” for
2 µs or more (under normal VCC conditions).
If more time is needed for the quartz-crystal oscillator to stabilize, this
“L” condition should be maintained for the required time.
XIN
Clock input
Input This chip has an internal clock generating circuit. To control generating
frequency, an external ceramic resonator or a quartz-crystal oscillator
XOUT
Clock output
is connected between pins XIN and XOUT. If an external clock is used,
Output the clock source should be connected to the XIN pin and the XOUT pin
should be left open.
P00
PWM0–
P05/
I/O port P0
I/O Port P0 is an 8-bit I/O port with direction register allowing each I/O bit
to be individually programmed as input or output. At reset, this port is
set to input mode. The output structure is N-channel open-drain output.
PWM5,
P06/INT2/ PWM output
A-D4,
P07/INT1 External
interrupt input
Analog input
P10/OUT2, I/O port P1
P11/SCL1,
P12/SCL2, CRT output
P13/SDA1,
P14/SDA2, Multi-master
P15/A-D1/ I²C-BUS
INT3,
interface
P16/A-D2, Analog input
P17/A-D3
External
Output Pins P00–P05 are also used as PWM output pins PWM0–PWM5
respectively. The output structure is N-channel open-drain output.
Input Pins P06 , P07 are also used as external interrupt input pins INT2,
INT1 respectively.
Input P06 pin is also used as analog input pin A-D4.
I/O Port P1 is an 8-bit I/O port and has basically the same functions as
port P0. The output structure is CMOS output.
Output Pins P10 is also used as CRT output pin OUT2. The output structure
is CMOS output.
I/O Pins P11–P14 are used as SCL1, SCL2, SDA1 and SDA2 respectively,
when multi-master I²C-BUS interface is used. The output structure is
N-channel open-drain output.
Input Pins P15–P17 are also used as analog input pins A-D1 to A-D3
respectively.
Input ^{P15 pin is also used as external interrupt input pin INT3.}
interrupt input
7220 Group User’s Manual
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