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參數(shù)資料
| 型號： | EM78P451 |
| 英文描述： | Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Protection Features; Temperature Range: 0°C to 70°C; Package: 16-QFN |
| 中文描述： | 8位微控制器的通用產(chǎn)品[英文] |
| 文件頁數(shù)： | 29/52頁 |
| 文件大小： | 1287K |
| 代理商： | EM78P451 |
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EM78P451
OTP ROM
This specification is subject to change without prior notice.
2002/03/01
35
Bits 0 of R3F and bits 0 of IOCF registers are cleared.
The sleep mode (power down) is achieved by executing the SLEP instruction (named as SLEEP1
MODE). While entering sleep mode, the WDT (if enabled) is cleared but keeps on running. The
controller is awakened by WDT timeout (if enabled), and it will cause the controller to reset. The T and
P flags of R3 are used to determine the source of the reset (wake-up).
In addition to the basic SLEEP1 MODE, EM78P451 has another sleep mode (caused by clearing
"SLPC" bit of IOCE register, designated as SLEEP2 MODE). In the SLEEP2 MODE, the controller
can be awakened by-
(a) Any one of the wake-up pins is set to “0.” (refer to Fig.17). Upon waking, the controller will
continue to execute the program in-line. In this case, before entering SLEEP2 MODE, the wake-up
function of the trigger sources (P60~P67, P74~P75, and P90~P91)should be selected (e.g. input
pin) and enabled (e.g. pull-high, wake-up control). One caution should be noted is that after waking
up, the WDT is enabled if Code Option bit ENWDT is "1". The WDT operation (to be enabled or
disabled) should be appropriately controlled by software after waking up.
(b) WDT time-out (if enabled). On wake-up, will cause the controller reset.
Table 6 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
C57
C56
C55
C54
C53
C52
C51
C50
N/A
IOC5
Power-On
1
/RESET and WDT
1
Wake-Up from Pin Change
P
Bit Name
C67
C66
C65
C64
C63
C62
C61
C60
N/A
IOC6
Power-On
1
/RESET and WDT
1
Wake-Up from Pin Change
P
Bit Name
C77
C76
C75
C74
C73
C72
C71
C70
N/A
IOC7
Power-On
1
/RESET and WDT
1
Wake-Up from Pin Change
P
Bit Name
C87
C86
C85
C84
C83
C82
C81
C80
N/A
IOC8
Power-On
1
/RESET and WDT
1
Wake-Up from Pin Change
P
Bit Name
C97
C96
C95
C94
C93
C92
C91
C90
N/A
IOC9
Power-On
1
/RESET and WDT
1
Wake-Up from Pin Change
P
Bit Name
/PHEN
/INT
-
PAB
PSR2 PSR1 PSR0
N/A
CONT
Power-On
1
0
1
/RESET and WDT
1
P
1
Wake-Up from Pin Change
P
Bit Name
-
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