7220 Datasheet, PDF (144/303 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

M37220M3-XXXSP/FP
4.3 Pin description
4.3 Pin description
The pin description of M37220M3-XXXSP/FP is shown in Table 4.3.1.
Table 4.3.1 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
CNVSS
This is connected to VSS.
RESET Reset input
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
Output ^{is connected between pins XIN and XOUT. If an external clock is used,}
the clock source should be connected to the XIN pin and the XOUT pin
should be left open.
P00
I/O port P0
I/O Port P0 is an 8-bit I/O port with direction register allowing each I/O bit
PWM0–
to be individually programmed as input or output. At reset, this port is
P05/
set to input mode. The output structure is N-channel open-drain output.
PWM5,
The note out of this Table gives a full of port P0 function.
P06/INT2/ PWM output Output Pins P00–P05 are also used as PWM output pins PWM0–PWM5
A-D4,
respectively. The output structure is N-channel open-drain output.
P07/INT1 External
Input Pins P06 , P07 are also used as external interrupt input pins INT2,
interrupt input
INT1 respectively.
Analog input Input P06 pin is also used as analog input pin A-D4.
P11–P14, I/O port P1
I/O Port P1 is an 8-bit I/O port and has basically the same functions as
P15/A-D1/
port P0. The output structure is CMOS output.
INT3,
Analog input Input Pins P15–P17 are also used as analog input pins A-D1 to A-D3
P16/A-D2,
respectively.
P17/A-D3 External
Input P15 pin is also used as external interrupt input pin INT3.
interrupt input
4-6
7220 Group User’s Manual