参数资料
型号: M34518E8SP
元件分类: 微控制器/微处理器
英文描述: 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDIP32
封装: 8.90 X 28 MM, 1.78 MM PITCH, PLASTIC, SDIP-32
文件页数: 126/162页
文件大小: 1149K
代理商: M34518E8SP
Rev.3.01
2005.06.15
page 64 of 157
REJ03B0008-0301
4518 Group
Fig. 53 State transition
Fig. 54 Set source and clear source of the P flag
Fig. 55 Start condition identified example using the SNZP in-
struction
A
Operation state
Operation source clock:
f(RING)
f(XIN): Stop
Key-on wakeup
POF instruction
execution
E
RAM back-up mode
D
Operation source clock:
f(XIN)
f(RING): Stop
POF instruction
execution
Operation state
Notes 1: Microcomputer starts its operation after counting f(RING) 120 to 144 times.
C
POF instruction
execution
Operation state
Operation source clock:
f(XIN)
f(RING): Operating
B
POF instruction
execution
Operation state
Operation source clock:
f(RING)
f(XIN): Operating
f(RING): stop
f(XIN): stop
MR1
←1
MR1
←0
(Note 5)
(Note 4)
MR0
←1
MR0
←0
RG0
←0
RG0
←1
Reset
(Note 1)
(Note 2)
(Note 3)
However, the selected contents (CMCK, CRCK, CYCK instruction execution state) of f(XIN) oscillation circuit is retained.
5: System returns to state A certainly when returning from the RAM back-up mode.
4: Continuous execution of the EPOF instruction and the POF instruction is required to go into the RAM back-up state.
3: Generate the wait time by software until the oscillation is stabilized, and then, switch the system clock.
MR1 cannot be cleared to “0” when the oscillation circuit is not selected.
Surely, select the f(XIN) oscillation circuit by executing the CMCK, CRCK or CYCK instruction before clearing MR1 to “0”.
The start/stop of oscillation and the operation source is switched by register MR.
instruction starts oscillatng (the start of oscillation and the operation source clock is not switched by these instructions).
2: The f(XIN) oscillation circuit (ceramic resonance, RC oscillation or quartz-crystal oscillation) selected by the CMCK, CRCK or CYCK
S
R
Q
Power down flag P
POF
instruction
Reset input
q Set source
q Clear source
Reset input
EPOF
instruction +
POF instruction
EPOF instruction +
Program start
P = “1”
?
Yes
Warm start
Cold start
No
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