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M38207E8FP Datasheet, PDF (4/66 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER | |||
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MITSUBISHI MICROCOMPUTERS
3820 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PIN DESCRIPTION
Pin
VCC
VSS
RESET
XIN
XOUT
Name
Power source
Reset input
Clock input
Clock output
VL1 â VL3
LCD power source
COM0 â COM3 Common output
SEG0 â SEG15 Segment output
P00/SEG24 â I/O port P0
P07/SEG31
P10/SEG32 â I/O port P1
P17/SEG39
P20 â P27 I/O port P2
P30/SEG16 â Input port P3
P37/SEG23
P40
Input port P4
P41/ Ï
P42/INT0,
P43/INT1
P44/RXD,
P45/TXD,
P46/SCLK1,
P47/SRDY1
I/O port P4
Function
⢠Apply voltage of 2.5 V to 5.5 V to VCC, and 0 V to VSS.
(Extended operating temperature version : 3.0 V to 5.5 V)
Function except a port function
⢠Reset input pin for active âLâ
⢠Input and output pins for the main clock generating circuit.
⢠Feedback resistor is built in between XIN pin and XOUT pin.
⢠Connect a ceramic resonator or a 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.
⢠This clock is used as the oscillating source of system clock.
⢠Input 0 ⤠VL1 ⤠VL2 ⤠VL3 ⤠VCC voltage
⢠Input 0 â VL3 voltage to LCD
⢠LCD common output pins
⢠COM2 and COM3 are not used at 1/2 duty ratio.
⢠COM3 is not used at 1/3 duty ratio.
⢠LCD segment output pins
⢠8-bit I/O port
⢠CMOS compatible input level
⢠CMOS 3-state output structure
⢠I/O direction register allows each port to be individually
programmed as either input or output.
⢠Pull-down control is enabled.
⢠LCD segment pins
⢠8-bit I/O port
⢠CMOS compatible input level
⢠CMOS 3-state output structure
⢠I/O direction register allows each port to be individually
programmed as either input or output.
⢠Pull-down control is enabled.
⢠8-bit I/O port
⢠CMOS compatible input level
⢠CMOS 3-state output structure
⢠I/O direction register allows each pin to be individually
programmed as either input or output.
⢠Pull-up control is enabled.
⢠Key input (key-on wake up) interrupt
input pins
⢠8-bit Input port
⢠CMOS compatible input level
⢠Pull-down control is enabled.
⢠LCD segment pins
⢠1-bit input pin
⢠CMOS compatible input level
⢠7-bit I/O port
⢠CMOS compatible input level
⢠CMOS 3-state output structure
⢠I/O direction register allows each pin to be individually
programmed as either input or output.
⢠Pull-up control is enabled.
â¢ Ï clock output pin
⢠Interrupt input pins
⢠Serial I/O1 function pins
4
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