38D2 datasheet(5/136 Pages) RENESAS

5 / 136 page

Rev.3.02

Apr 10, 2008

Page 5 of 131

REJ03B0177-0302

38D2 Group

PIN DESCRIPTION

Table 2

Pin description (1)

Name

Function

Function except a port function

VCC, VSS

Power source

• Apply 1.8 to 5.5 V 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

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.

P00/SEG0/(KW4)

−

P03/SEG3/(KW7)

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.

• LCD segment

output pins

• Key input interrupt

input pins

P04/SEG4

−

P07/SEG7

P10/SEG8

−

P17/SEG15

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

individually programmed as either input or output.

• Pull-up control is enabled in a bit unit.

P20/SEG16

−

P25/SEG21

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.

P26/SEG22/VL1

P27/SEG23/VL2

• LCD power source

pins

P30/SRDY2/(LED0)

P31/SCLK2/(LED1)

P32/TxD2/(LED2)

P33/RxD2/(LED3)

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.

• Serial I/O2 function pins

P34/INT2/(LED4)

• External interrupt pin

P35/TXOUT1/(LED5)

P36/T2OUT/CKOUT/

(LED6)

• Timer X, Timer 2 output pins

P37/CNTR0/TXOUT2/

(LED7)

• Timer X function pin

P40/OOUT0/AN0

P41/OOUT1/AN1

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.

• A/D convertor

input pins

• Oscillation

external output

pins

P42/AN2/ADKEY

•ADKEY

P43/AN3

−P45/AN5

P46/RTP0/AN6

P47/RTP1/AN7

• Real time port

function pins

P50/INT0

P51/INT1

I/O port P5

• 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

• External input pins

P52/T3OUT/PWM0

P53/T4OUT/PWM1

• Timer 3, Timer 4 output pins

• PWM output pins

P54/RxD1/(KW0)

P55/TxD1/(KW1)

P56/SCLK1/(KW2)

P57/SRDY1/(KW3)

• Serial I/O1 function pins

• Key input interrupt input pins

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