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M38220E1-FP Datasheet

  • M38220E1-FP

  • SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

  • 980.52KB

  • 78页

  • MITSUBISHI   MITSUBISHI

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MITSUBISHI MICROCOMPUTERS
3822 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PIN DESCRIPTION
Table 1 Pin description (1)
Pin
V
CC
, V
SS
V
REF
AV
SS
Name
Power source
Analog refer-
ence voltage
Analog power
source
Reset input
Clock input
Clock output
Function
Function except a port function
鈥pply voltage of power source to V
CC
, and 0 V to V
SS
. (For the limits of V
CC
, refer to 鈥淩ecom-
mended operating conditions鈥?.
鈥eference voltage input pin for A-D converter.
鈥ND input pin for A-D converter.
鈥onnect to V
SS
.
鈥eset input pin for active 鈥淟鈥?
鈥nput and output pins for the main clock generating circuit.
鈥eedback resistor is built in between X
IN
pin and X
OUT
pin.
鈥onnect a ceramic resonator or a quartz-crystal oscillator between the X
IN
and X
OUT
pins to set
the oscillation frequency.
鈥f an external clock is used, connect the clock source to the X
IN
pin and leave the X
OUT
pin open.
鈥his clock is used as the oscillating source of system clock.
鈥nput 0
鈮?/div>
V
L1
鈮?/div>
V
L2
鈮?/div>
V
L3
鈮?/div>
V
CC
voltage.
鈥nput 0 鈥?V
L3
voltage to LCD.
鈥CD common output pins.
鈥OM
2
and COM
3
are not used at 1/2 duty ratio.
鈥OM
3
is not used at 1/3 duty ratio.
RESET
X
IN
X
OUT
V
L1
鈥揤
L3
COM
0
鈥揅OM
3
LCD power
source
Common output
SEG
0
鈥揝EG
11
P0
0
/SEG
16
鈥?/div>
P0
7
/SEG
23
Segment output
I/O port P0
鈥CD segment output pins.
鈥?-bit output port.
鈥MOS compatible input level.
鈥MOS 3-state output structure.
鈥CD segment output pins
P1
0
/SEG
24
鈥?/div>
P1
7
/SEG
31
P2
0
鈥?P2
7
I/O port P1
鈥/O direction register allows each port to be individually
programmed as either input or output.
鈥ull-down control is enabled.
鈥?-bit I/O port.
鈥MOS compatible input level.
鈥MOS 3-state output structure.
鈥/O direction register allows each pin to be individually
programmed as either input or output.
鈥ull-up control is enabled.
鈥ey input (key-on wake-up) interrupt
input pins
I/O port P2
P3
4
/SEG
12
鈥?/div>
P3
7
/SEG
15
Input port P3
鈥?-bit input port.
鈥MOS compatible input level.
鈥ull-down control is enabled.
鈥CD segment output pins
4

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