M38002M4 Datasheet, PDF (19/173 Pages) Mitsubishi Electric Semiconductor – 8-BIT SINGLE-CHIP MICROCOMPUTER

HARDWARE
PIN DESCRIPTION
PIN DESCRIPTION
Table 1. Pin description
Pin
Name
VCC
VSS
CNVSS
Power source
CNVSS
RESET
XIN
Reset input
Clock input
XOUT
Clock output
P00 – P07 I/O port P0
P10 – P17 I/O port P1
P20 – P27 I/O port P2
P30 – P37 I/O port P3
P40, P41
I/O port P4
P42/INT0,
P43/INT1
P44/RXD,
P45/TXD,
P46/SCLK,
P47/SRDY
P50/INT2 – I/O port P5
P53/INT5
P54/CNTR0,
P55/CNTR1
P56, P57
Function
Function except a port function
• Apply voltage of 3.0 V to 5.5 V to VCC, and 0 V to VSS.
(Extended operating temperature version : 4.0 V to 5.5 V)
• This pin controls the operation mode of the chip.
• Normally connected to VSS.
• If this pin is connected to VCC, the internal ROM is inhibited and external memory is accessed.
• Reset input pin for active “L”
• Input and output signals for the internal clock generating circuit.
• Connect a ceramic resonator or quartz-crystal oscillator between the XIN and XOUT pins to set the
oscillation frequency.
• If an external clock is used, connect the clock source to the XIN pin and leave the XOUT pin open.
• The clock is used as the oscillating source of system clock.
• 8 bit CMOS I/O port
• I/O direction register allows each pin to be individually programmed as either input or output.
• At reset this port is set to input mode.
• In modes other than single-chip, these pins are used as address, data, and control bus I/O pins.
• CMOS compatible input level
• CMOS 3-state output structure
• 8-bit CMOS I/O port with the same function as port P0
• CMOS compatible input level
• CMOS 3-state output structure
• External interrupt input pins
• Serial I/O I/O pins
• 8-bit CMOS I/O port with the same function as
port P0
• CMOS compatible input level
• CMOS 3-state output structure
• External interrupt input pins
• Timer X and Timer Y I/O pins
P60 – P67 I/O port P6
P70, P71
I/O port P7
• 8-bit CMOS I/O port with the same function as port P0
• CMOS compatible input level
• CMOS 3-state output structure
• 2-bit CMOS I/O port with the same function as port P0
• CMOS compatible input level
• CMOS 3-state output structure
3800 GROUP USER’S MANUAL
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