R8CSLASH2G datasheet(287/344 Pages) RENESAS

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R8C/2G Group

20. Flash Memory

Rev.1.00

Apr 04, 2008

Page 267 of 318

REJ09B0387-0100

Figure 20.16

Example of Pin Processing in Standard Serial I/O Mode 3

Table 20.7

Pin Functions (Flash Memory Standard Serial I/O Mode 3)

Name

I/O

Description

VCC,VSS

Power input

Apply the voltage guaranteed for programming and

erasure to the VCC pin and 0 V to the VSS pin.

RESET

Reset input

Reset input pin.

P4_3/XCIN

P4_3 input/clock input

Connect crystal oscillator between pins XCIN and

XCOUT when connecting external oscillator.

To use P4_3 as an input port, input a “H” or “L” level

signal or leave the pin open.

To use P4_4 as an output port, leave the pin open.

P4_4/XCOUT

P4_4 output/clock

output

P0_4 to P0_7

Input port P0

Input a “H” or “L” level signal or leave the pin open.

P1_0 to P1_7

Input port P1

P3_0 to P3_7

Input port P3

P4_5

Input port P4

P6_0, P6_3 to P6_6 Input port P6

MODE

I/O Serial data I/O pin. Connect to the flash programmer.

NOTES:

1. Controlled pins and external circuits vary depending on the programmer.

Refer to the programmer manual for details.

2. In this example, modes are switched between single-chip mode and

standard serial I/O mode by connecting a programmer.

3. When operating with the on-chip oscillator clock, it is not necessary to

connect an oscillating circuit.

MCU

MODE

RESET

User reset signal

MODE I/O

Reset input

VSS

VCC

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