4509 Datasheet, PDF (59/142 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4509 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 24 lists the pin description (QzROM writing mode) and Figure
55 shows the pin connections.
Refer to Figure 56 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.
Table 24 Pin description (QzROM writing mode)
Pin
Name
I/O
VDD
VSS
CNVSS
Power source

GND

VPP input

P20/AIN0
P21/AIN1
D3/AIN5
____________
RESET
SDA input/output
SCLK input
________
PGM input
Reset input
XIN
Clock input
XOUT
Clock output
D0, D1, D2/AIN4, D4, D5, I/O port
P00/SIN, P01/SOUT,
P02/SCK, P03, P10,
P11/CNTR1,
P12/CNTR0, P13/INT,
P30/AIN2, P31/AIN3
I/O
Input
Input
Input


I/O
Function
• Power supply voltage pin.
• GND pin.
• QzROM programmable power source pin.
• VPP input is possible with VSS connected via a resistor of about 5 kΩ.
• QzROM serial data I/O pin.
• QzROM serial clock input pin.
• QzROM read/program pulse input pin.
• Reset input pin.
• Input “L” level signal.
• Either connect an oscillation circuit or connect XIN pin to VSS and leave the
XOUT pin open.
• Input “H” or “L” level signal or leave the pin open.
Rev.1.02 2006.12.22 page 59 of 140
REJ03B0147-0102