R8C2K datasheet(411/471 Pages) RENESAS

411 / 471 page

R8C/2K Group, R8C/2L Group

20. Flash Memory

Rev.1.10

Dec 21, 2007

Page 394 of 450

REJ09B0406-0110

Figure 20.26

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

Table 20.8

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_6/XIN

P4_6 input/clock input

Connect a ceramic resonator or crystal oscillator

between the XIN and XOUT pins when connecting

external oscillator. Apply “H” and “L” or leave the pin

open when using as input port.

P4_7/XOUT

P4_7 input/clock output

I/O

P0_0 to P0_3, P0_5

Input port P0

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

P1_0 to P1_7

Input port P1

P2_0 to P2_7

Input port P2

P3_3 to P3_5

Input port P3

P4_2/VREF, P4_5

Input port P4

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

MODE I/O

Reset input

User reset signal

VSS

AVSS

VCC

AVCC

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