參數(shù)資料
型號(hào): M3455AGC-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP52
封裝: 10 X 10 MM, 0.65 MM PITCH, PLASTIC, LQFP-52
文件頁(yè)數(shù): 116/150頁(yè)
文件大?。?/td> 1818K
代理商: M3455AGC-XXXFP
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Rev.1.02
Nov 26, 2008
Page 66 of 146
REJ03B0224-0102
455A 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 64 shows the pin connections.
Refer to Figure 65 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)
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
input
Either connect an oscillator circuit or connect XIN and XCIN to VSS
and leave XOUT and XCOUT open.
XOUT, XCOUT
Clock output
output
D0
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.
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
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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