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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)： | 34/52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
4
3. PIN ASSIGNMENT
2
3
4
5
6
7
8
9
10
11
12
1
13
14
15
16
17
18
19
20
39
38
37
36
35
34
33
32
31
30
29
40
28
27
26
25
24
23
22
21
VSS
INT
DATA
P91
SDI/P92
SDO/P93
SCK/P94
SS/P95
CLK
P90
OSCO
P50
P51
P52
P53
P54
P55
P56
P57
P80
P81
P83
P84
P60
P87
P86
P85
P62
P61
P63
P64
P65
P66
R-OSCI
VDD
P71
P72
P67
P82
EM78P451P/WM
P70
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
P55
P56
P86
P85
P84
P83
P82
NC
P81
P80
P57
33
32
31
30
29
28
27
26
25
24
23
P87
P64
P63
P72
P65
P66
P60
P61
P62
P67
P71
P90
P91
SDI/P92
SDO/P93
P50
P51
P52
P53
P54
SCK/P94
SS/P95
DATA
CLK
VSS
OSCO
R-OSCI
VDD
NC
INT
EM78P451AQ
P70
Fig. 1 Pin Assignment
Table 1 Pin description
Symbol
Pin No.
Type
Function Description
R-OSCI
39
I
* In XTAL mode: Crystal input; In internal C, external R mode: 56Kohm
±5%
pull high for 1.8432MHz.
OSCO
40
O
* In XTAL mode: Crystal output; In RC mode: Instruction clock output.
P90~P95
5~10
I/O
* General bi-directional I/O port. All of its pins can be pulled-high by software.
P90 and P91 are pin-change wake up pins.
P80~P87
19~26
I/O
* General bi-directional I/O port. All of its pins can be pulled-high by software.
P80 and P81 are also used as the R-option pins.
P70~P72
37~35
I/O
* LED direct-driving pin with internal serial resistor used as output and is
software defined.
CLK
4
I/O
* By connecting P74 and P76 together.
* P74 can be pulled-high by software and it is also a pin-change wake up pin.
* P76 can be defined as an open-drain output.
DATA
3
I/O
* By connecting P75 and P77 together.
* P75 can be pulled-high by software and it is also a pin-change wake up pin.
* P77 can be defined as an open-drain output.
P60~P67
27~34
I/O
* General bi-directional port. All of its pins can be pulled-high by software, and
pin-change wake up pins.
P50~P57
11~18
I/O
* General bi-directional I/O port. All of its pins can be pulled-high individually
by software.
VDD
38
-
* Power supply pin.
VSS
1
-
* Ground pin.
/INT
2
I
* An interrupt schmitt-triggered pin.
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