參數(shù)資料
型號: M34508G4FP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO20
封裝: 5.30 X12.60 MM, 1.27 MM PITCH, PLASTIC, SOP-20
文件頁數(shù): 53/106頁
文件大小: 1059K
代理商: M34508G4FP
Rev.1.03
2009.07.27
page 48 of 140
REJ03B0148-0103
4508 Group
Fig. 42 Power-on reset operation
Name
D0, D1
D2/AIN4, D3/AIN5
P00/SIN, P01/SOUT, P02/SCK
P03
P10
P11/CNTR1
P12/CNTR0
P13/INT
P20/AIN0, P21/AIN1
Notes 1: Output latch is set to “1.”
2: The output structure is N-channel open-drain.
3: Pull-up transistor is turned OFF.
Function
D0, D1
D2, D3
P00, P01, P02
P03
P10
P11
P12
P13
P20, P21
State
High-impedance (Notes 1, 2)
High-impedance (Notes 1, 2, 3)
(2) Power-on reset (only for H version)
Reset can be automatically performed at power on (power-on reset)
by the built-in power-on reset circuit. When the built-in power-on re-
set 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.
(3) System reset instruction (SRST)
By executing the SRST instruction, “L” level is output to RESET pin
and system reset is performed.
Table 17 Port state at reset
VDD
Power-on
Reset released
Internal reset signal
Reset
state
Power-on reset
circuit output
→←
100 s or less
Reset state
Note: Keep the value of supply voltage to
the minimum value or more of the
recommended operating conditions.
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