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| 型號： | EM78P451S |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | Quad, Serial, 8-Bit DACs with Rail-to-Rail Outputs |
| 中文描述： | 8位微控制器的OTP ROM的 |
| 文件頁數(shù)： | 37/54頁 |
| 文件大?。?/td> | 421K |
| 代理商： | EM78P451S |
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EM78P451S
8-Bit Microcontroller with OTP ROM
Product Specification (V1.0) 06.01.2004
(This specification is subject to change without further notice)
33
Table 6 Usage of Sleep and Sleep2 Mode
Usage of Sleep and Sleep2 Mode
SLEEP2
SLEEP
(a) Before SLEEP
1. Set Port6 or P74 or P75 Input
2. Enable Pull-High and set WDT prescaler over
1:1 (Set CONT.7 and CONT.3 ~ CONT.0)
3. Enable Wake-up (Set IOCB or IOCE.0)
4. Execute Seep2 (Set IOCE.4)
(b) After Wake-up
1. Next instruction
2. Disable Wake-up
3. Disable WDT (Set IOCE.5)
(a) Before SLEEP
1. Execute SLEP instruction
(b) After Wake-up
1. Reset
If Port6 Input Status Changed Wake-up is used to wake-up the EM78P451S (Case [a] above), the
following instructions must be executed before entering SLEEP2 mode:
MOV
A, @11111111b
IOW
IOC6
MOV
A, @0xxx1010b
; Set Port6 pull-high, WDT prescaler, prescaler must set over 1:1
CONTW
MOV
A, @xx00xxx0b
; Enable Port6 wake-up function, Enable SLEEP2
IOW
IOCE
After Wake-up
NOP
MOV
A, @ xx01xxx1b
; Disable Port6 wake-up function; Disable WDT
IOW
IOCE
; Set Port6 input
After waking up from the SLEEP2 mode, WDT is automatically enabled. The WDT enabled/disabled
operation after waking up from SLEEP2 mode should be appropriately defined in the software.
To avoid a reset from occurring when the Port 6 Input Status Changed Interrupt enters into interrupt
vector or is used to wake-up the MCU, the WDT prescaler must be set above the 1:1 ratio.
Table 7 The Summary of the Initialized Values for Registers
Address
Name
Reset Type
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit Name
Power-On
/RESET and WDT
Wake-Up from Pin
Change
Bit Name
Power-On
/RESET and WDT
Wake-Up from Pin
Change
Bit Name
Power-On
/RESET and WDT
Wake-Up from Pin
Change
Bit Name
Power-On
/RESET and WDT
C57
1
1
C56
1
1
C55
1
1
C54
1
1
C53
1
1
C52
1
1
C51
1
1
C50
1
1
N/A
IOC5
P
P
P
P
P
P
P
P
C67
1
1
C66
1
1
C65
1
1
C64
1
1
C63
1
1
C62
1
1
C61
1
1
C60
1
1
N/A
IOC6
P
P
P
P
P
P
P
C77
1
1
C76
1
1
C75
1
1
C74
1
1
C73
1
1
C72
1
1
C71
1
1
C70
1
1
N/A
IOC7
P
P
P
P
P
P
P
P
C87
1
1
C86
1
1
C85
1
1
C84
1
1
C83
1
1
C82
1
1
C81
1
1
C80
1
1
N/A
IOC8
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