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M38D50G2XXXHP Datasheet(PDF) 7 Page - Renesas Technology Corp

Part # M38D50G2XXXHP
Description  SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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Rev.3.04
May 20, 2008
Page 7 of 134
REJ03B0158-0304
38D5 Group
PIN DESCRIPTION
Table 3
Pin description (1)
Pin
Name
Function
Function except a port function
VCC, VSS
Power source
• Apply power source voltage to VCC, and 0 V to VSS.
RESET
Reset input
• Reset input pin for active “L”.
XIN
Clock input
• Input and output pins for the main clock generating circuit.
• Connect a ceramic resonator or a quartz-crystal oscillator between the XIN and XOUT pins to
set the oscillation frequency. When an external clock is used, connect the clock source to
XIN, and leave XOUT pin open.
• Feedback resistor is built in between XIN pin and XOUT pin.
XOUT
Clock output
VL1, VL2, VL3
LCD power
source
• Input 0
≤ VL1 ≤ VL2 ≤ VL3 voltage.
• Input 0
− VL3 voltage to LCD.
COM0
COM3
Common output
• LCD common output pins.
•COM2 and COM3 are not used at 1/2 duty ratio.
•COM3 is not used at 1/3 duty ratio.
COM4
/SEG35
COM7
/SEG32
Common output
Segment output
• LCD common/segment output pins.
P00/SEG8
P07/SEG15
I/O port P0
• 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 in a bit unit.
P10/SEG16
P17/SEG23
I/O port P1
• 8-bit I/O port.
• CMOS compatible input level.
• CMOS 3-state output structure.
• I/O direction register allows each pin to be
programmed as either input or output.
• Pull-up control is enabled in 4-bit unit.
P20/SEG0/(KW4)
P23/SEG3/(KW7)
I/O port P2
• 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 in a bit unit.
• Key input interrupt
input pins
P24/SEG4
P27/SEG7
P30/SEG24
P37/SEG31
I/O port P3
• 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 in 4-bit unit.
P40/RXD
P41/TXD
P42/SCLK1
P43/SRDY1
I/O port P4
• 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 in 4-bit unit.
• Serial I/O1 function pins
P44/SIN2/(KW0)
P45/SOUT2/(KW1)
P46/SCLK2/(KW2)
P47/SRDY2/(KW3)
• Serial I/O2
function pins
• Key input interrupt
input pins


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