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參數(shù)資料
| 型號(hào)： | 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)： | 5/52頁 |
| 文件大?。?/td> | 1287K |
| 代理商： | EM78P451 |
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EM78P451
OTP ROM
This specification is subject to change without prior notice.
2002/03/01
13
Both P74 and P76 should not be defined as output pins at the same time. This also applies to both
P75 and P77.
Only the lower 6 bits of the IOC9 register are used.
4. IOCC (T1CON: Timer1 control register)
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0x0C
T1CON/IOCC
0
TM1E
TM1P1
TM1P0
TM1E (bit2): Timer1 Function Enable bit
1 = Enable timer1 function.
0 = Disable timer1 function as default.
TM1P (bit1~bit0): Timer1 Prescaler bit
Timer1 prescaler table for FOSC will be illustrated in the Section on Ti mer1 in later pages.
5. IOCD (Pull-high Control Register)
7
6
5
4
3
2
1
0
S7
-
/PU9
/PU8
/PU6
/PU5
The default values of /PU5, /PU6, /PU8, and /PU9 are one, which means the pull-high function is
disabled.
/PU6 and /PU9 are “AND” gating with /PHEN, that is, when each one is written as “0” pull high is
enabled.
S7 defines the driving ability of the P70-P72.
0: Normal output.
1: Enhance the driving ability of LED.
6. IOCE (WDT Control Register)
7
6
5
4
3
2
1
0
-
ODE
WDTE
SLPC
ROC
-
/WUE
Bit 0 (/WUE) Control bit used to enable the wake-up function of P60~P67, P74~P75, and P90~P91.
0: Enable the wake-up function.
1: Disable the wake-up function.
The /WUE bit can be read and written.
Bit 3 (ROC) ROC is used for the R-option. Setting ROC to "1" will enable the status of R-option pins
(P80, P81) to be read by the controller. Clearing ROC will disable the R-option function. Otherwise,
the R-option function is introduced. Users must connect the P81 pin or/and P80 pin to VSS by a
560K
external resistor (Rex). If Rex is connected/disconnected with VDD, the status of P80 (P81)
will be read as "0"/"1" (refer to Fig. 7(b)). The ROC bit can be read and written.
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