參數(shù)資料
型號: M34552M8H-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48
封裝: 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件頁數(shù): 95/147頁
文件大?。?/td> 1091K
代理商: M34552M8H-XXXFP
Rev.3.02
Dec 22, 2006
page 49 of 142
REJ03B0023-0302
4552 Group
Fig. 39 Structure of reset pin and its peripherals,, and power-on reset operation
Name
D0–D4
D5/INT
XCIN/D6, XCOUT/D7
P00/SEG21–P03/SEG24
P10/SEG25–P13/SEG28
P20/SEG17–P23/SEG20
SEG0/VLC3–SEG2/VLC1
SEG3–SEG12, SEG14–SEG16
COM0–COM3
C/CNTR
Notes 1: Output latch is set to “1.”
2: Output structure is N-channel open-drain.
3: Pull-up transistor is turned OFF.
Function
D0–D4
D5
XCIN, XCOUT
P00–P03
P10–P13
P20–P23
SEG0–SEG2
SEG3–SEG12, SEG14–SEG16
COM0–COM3
C
State
High-impedance (Notes 1, 2)
Sub-clock input
High-impedance (Notes 1, 2, 3)
VLC3 (VDD) level
“L” (VSS) level
(1) Power-on reset
Reset can be automatically performed at power on (power-on re-
set) by the built-in power-on reset circuit. When the built-in
power-on reset circuit is used, set the time for the supply voltage to
rise from 0 V to the minimum voltage of recommended operating
conditions to 100
s or less.
If the rising time exceeds 100
s, connect a capacitor between the
RESET pin and VSS at the shortest distance, and input “L” level to
RESET pin until the value of supply voltage reaches the minimum
operating voltage.
Table 13 Port state at reset
RESET pin
W
SRST instruction
Voltage drop detection circuit
(only for H version)
EF
(Note 1)
Pull-up transistor
(Note 1)
Power-on reset circuit
VDD (Note 3)
100
s or less
(Note 2)
Internal reset signal
Power-on
Reset released
Internal reset signal
Reset
state
Notes 1:
This symbol represents a parasitic diode.
2: Applied potential to RESET pin must be VDD or less.
3: Keep the value of supply voltage to the minimum value
or more of the recommended operating conditions.
Po
circuit output
wer-on reset
Watchdog reset signal
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