4559 datasheet(65/148 Pages) RENESAS

65 / 148 page

Rev.1.04

Aug 23, 2007

Page 65 of 146

REJ03B0188-0104

4559 Group

QzROM Writing Mode

In the QzROM writing mode, the user ROM area can be

rewritten while the microcomputer is mounted on-board by using

a serial pro-grammer which is applicable for this microcomputer.

Table 29 lists the pin description (QzROM writing mode) and

Figure 66 shows the pin connections.

Refer to Figure 67 for examples of a connection with a serial pro-

grammer.

Contact the manufacturer of your serial programmer for serial

pro-grammer. Refer to the user ’s manual of your serial

programmer for details on how to use it.

Note 1. Note that the P20/SEG24 pin is pulled down internally by the MCU during the transition period (the period when VPP is

approximately 0.5 VDD to 1.3 VDD) when the programming power supply (VPP) is applied to the CNVSS pin. In addition, the

P20/SEG24 pin is high inpedance when VPP is approximately 1.3 VDD or grater.

Table 29 Pin description (QzROM writing mode)

Name

I/O

Function

VDD, VSS

Power source, GND

Apply 2.7 to 4.7V to VCC, and 0V to VSS.

RESET

Reset input

input

Reset input pin for active “L”. Reset occurs when RESET pin is hold

at an “L” level for 16 cycles or more of XIN.

XIN, XCIN

Clock input

input

Either connect an oscillator circuit or connect XIN and XCIN to VSS

and leave XOUT and XCOUT open.

XOUT, XCOUT

Clock output

output

− D5

P00/SEG16

− P03/SEG19

P10/SEG20

− P13/SEG23

P20/SEG24 (Note 1)

− P23/SEG27

P30/SEG28

− P33/SEG31

I/O port

I/O

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

CNVSS

VPP input

input

QzROM programmable power source pin.

SDA input/output

I/O

Serial data I/O pin.

SCLK input

input

Serial clock input pin.

PGM input

input

Read/program pulse input pin.

VDCE

Voltage drop

detection circuit

enable

input

Input “H” or “L” level signal

SEG0/VLC3

− SEG2/VLC1

SEG3

− SEG15

COM0

− COM3

Segment output/

LCD power source/

Common output

output

Either connect to an LCD panel or leave open.

C/CNTR

Output port C/

Timer I/O

output

C/CNTR pin outputs “L” level.

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