參數(shù)資料
型號: 4571
廠商: Renesas Technology Corp.
英文描述: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述: 單芯片4位微機的CMOS
文件頁數(shù): 68/126頁
文件大?。?/td> 1627K
代理商: 4571
Rev.1.02
May 25, 2007
Page 46 of 124
REJ03B0179-0102
4571 Group
Fig 47. State transition
Fig 48. Set source and clear source of the P flag
Fig 49. Start condition identified example using the
SNZP instruction
Notes 1: Microcomputer starts its operation after counting f( XIN) 5400 to 5424 times from system is released from reset.
2: Continuous execution of the EPOF instruction and the POF instruction is required to go into the RAM back-up state.
3: The operation mode also returns to the initial state (internal frequency divided by 4 mode) (register MR initialized).
State A
Operating state
f(XIN) : operating
POF instruction execution
(Note 2)
Key-on wakeup
(Notes 1, 3)
Reset
(Note 1)
State D
RAM back-up mode
f(XIN) : Stop
Q
S
+
R
EPOF
instruction
POF
instruction
Internal reset signal
Power down flag (P)
- Set source ...
- Clear source ... Reset
EPOF instruction + POF instruction
P = “1”
?
Yes
No
Warm start
SNZP instruction
Cold start
Software start
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