EM78P451S
8-Bit Microcontroller with OTP ROM
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12 wake-up pins.
2 open-drain pins.
2 R-option pins.
32 programmable pull-high input pins.
Packages:
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40 pin DIP 600mil: EM78P451SP .
40 pin SOP 450mil: EM78P451SWM
44 pin QFP: EM78P451SAQ.
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Four types of interrupts.
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External interrupt (/INT).
SPI transmission completed interrupt.
TCC overflow interrupt.
Timer1 comparator match interrupt.
3 PIN ASSIGNMENT
Vss
/INT
1
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
OSCO
R-OSCI
VDD
P70//RESET
P71
2
DATA
CLK
P90
3
4
5
26 25 24 23
33 32 31 30 29 28 27
34
P70//RESET
NC
22
21
20
P86
P85
P84
P83
P82
NC
P81
P80
P57
P56
P55
P91
P92/SDI
P93/SDO
P94/SCK
P95//SS
P50
6
P72
7
P67
35
8
P66
NC
36
37
9
P65
NC
19
10
11
12
13
14
15
16
17
18
19
20
P64
VDD
38
39
40
41
42
43
44
18
17
16
15
14
13
12
P63
R-OSCI
OSCO
Vss
EM78P451AQ
P51
P62
P61
P52
P60
P53
P54
/INT
P87
DATA
CLK
P55
P56
P57
P80
P81
P86
P85
P84
P83
P82
8
9
10 11
1
2
3
4
5
6
7
Fig. 1 Pin Assignment
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Product Specification (V1.0) 06.01.2004
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
