EM78P157N
8-Bit Microcontroller with OTP ROM
Programmable free running watchdog timer
8 programmable pull-high pins
7 programmable pull-down pins
8 programmable open-drain pins
2 programmable R-option pins
Package types:
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14 pin DIP
14 pin SOP
18 pin DIP
18 pin SOP
300mil : EM78P157NBP
150mil : EM78P157NBM
300mil : EM78P157NAP
300mil : EM78P157NAM
: EM78P157NAKM
20 pin SSOP 209mil : EM78P157NAAS
20 pin SSOP 209mil
99.9% single instruction cycle commands
The transient point of system frequency between HXT and LXT is around 400KHz
3
Pin Assignments and Descriptions
3.1 Pin Assignments
P52
P53
P52
P53
TCC
/RESET
Vss
P60/INT
P61
1
2
3
4
5
6
7
EM78P157NBP
EM78P157NBM
14
13
12
11
10
9
8
P51
P50
OSCI
OSCO
VDD
P67
P66
1
2
3
4
5
6
7
8
9
EM78P157NAP
EM78P157NAM
18
17
16
15
14
13
12
11
10
P51
P50
OSCI
OSCO
VDD
P67
P66
P65
P64
TCC
/RESET
Vss
P60/INT
P61
P62
P63
NC
P52
P53
TCC
/RESET
Vss
P60/INT
P61
P62
P63
1
2
3
4
5
6
7
8
9
10
EM78P157NAAS
20
19
18
17
16
15
14
13
12
11
NC
P51
P50
OSCI
OSCO
VDD
P67
P66
P65
P64
P52
P53
TCC
/RESET
Vss
Vss
P60/INT
P61
P62
P63
1
2
3
4
5
6
7
8
9
10
EM78P157NAKM
20
19
18
17
16
15
14
13
12
11
P51
P50
OSCI
OSCO
VDD
VDD
P67
P66
P65
P64
Fig. 1-1 Pin Assignments
2
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Product Specification (V1.0) 09.22.2005
(This specification is subject to change without further notice)
EMC [ ELAN MICROELECTRONICS CORP ]
