M37545RLSS datasheet(7/62 Pages) RENESAS

7 / 62 page

Rev.1.06

Mar 07, 2008

Page 7 of 59

REJ03B0140-0106

7545 Group

PIN DESCRIPTION

Table 3

Pin description

Name

Function

Function expect a port function

VCC, VSS

Power source

• Apply voltage of 1.8 to 3.6V to VCC, and 0 V to VSS.

VDDR

Power source

• Power source pin only for RAM2. When this pin is used, connect an approximately 0.1

µF

bypass capacitor across the VSS line and the VDDR line. When not used, connect it to VSS.

CNVSS

• Chip operating mode control pin, which is always connected to Vss.

RESET

Reset I/O

• An N-channel open-drain I/O pin for a system reset. This pin has a pull-up transistor. When the

watchdog timer, the built-in power-on reset or the voltage drop detection circuit causes the

system to be reset, the RESET pin outputs "L" level.

XIN

Clock input

• Input and output pins for main clock generating circuit

• Connect a ceramic resonator or quartz-crystal oscillator between the XIN and XOUT pins.

XOUT

Clock output

P00/KEY0

−

P07/KEY7

I/O port P0

• 8-bit I/O port.

• I/O direction register allows each pin to be individually

programmed as either input or output.

• CMOS compatible input level

• CMOS 3-state output structure

• Whether the pull-up function/key-on wakeup function

is to be used or not can be determined by program.

• Key-input (key-on wake up interrupt

input) pins

P10, P11

I/O port P1

• 2-bit I/O port having almost the same function as P0.

• CMOS compatible input level

• The output structure can be switched to N-channel

open-drain or CMOS by software.

Note: RLSS-only pins

P20(LED0)/INT0

P21(LED1)/INT1

P22(LED2)

−

P27(LED7)

I/O port P2

• 8-bit I/O port having almost the same function as P0.

• CMOS compatible input level

• The output structure can be switched to N-channel

open-drain or CMOS by software.

• P2 can output a large current for driving LED.

• Interrupt input pins

P30

−P37

I/O port P3

• 8-bit I/O port

• I/O direction register allows each pin to be individually programmed as either input or output.

• CMOS compatible input level

• The output structure can be switched to N-channel open-drain or CMOS by software.

P40(LED8),

P41(LED9)

I/O port P4

• 2-bit I/O port having almost the same function as P0.

• CMOS compatible input level

• CMOS 3-state output structure

Note: RLSS-only pins

P42/CARR

• 1-bit I/O port

• CMOS compatible input level

• CMOS 3-state output structure

• Carrier wave output pin for remote-

control transmit

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