4559 Datasheet, PDF (65/148 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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.
Table 29 Pin description (QzROM writing mode)
Pin
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
XOUT, XCOUT
Clock output
D0 − D5
P00/SEG16 − P03/SEG19
P10/SEG20 − P13/SEG23
I/O port
P20/SEG24 (Note 1) − P23/SEG27
P30/SEG28 − P33/SEG31
input _{Either connect an oscillator circuit or connect XIN and XCIN to VSS}
output ^{and leave XOUT and XCOUT open.}
I/O
Input “H” or “L” level signal or leave the pin open.
CNVSS
VPP input
input QzROM programmable power source pin.
D4
SDA input/output I/O
Serial data I/O pin.
D3
SCLK input
input Serial clock input pin.
D2
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
C/CNTR
Segment output/
LCD power source/
Common output
Output port C/
Timer I/O
output
output
Either connect to an LCD panel or leave open.
C/CNTR pin outputs “L” level.
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.
Rev.1.04 Aug 23, 2007 Page 65 of 146
REJ03B0188-0104