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EM78P156ELAS Datasheet(PDF) 6 Page - ELAN Microelectronics Corp

Part # EM78P156ELAS
Description  8-BIT MICRO-CONTROLLER
PDF  55 Pages
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Manufacturer  EMC [ELAN Microelectronics Corp]
Direct Link  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78P156ELAS Datasheet(HTML) 6 Page - ELAN Microelectronics Corp

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EM78P156EL
OTP ROM
3. PIN ASSIGNMENTS
TCC
VDD
Vss
P50
P51
P53
P60/INT
P61
P62
P63
P64
P52
/RESET
OSCI
OSCO
P67
P66
P65
1
2
3
4
5
6
7
8
9
16
15
14
13
12
11
10
17
18
TCC
VDD
Vss
P50
P51
P53
P60/INT
P61
P62
P63
P64
P52
/RESET
OSCI
OSCO
P67
P66
P65
1
2
3
4
5
6
7
8
9
16
15
14
13
12
11
10
17
18
NC
NC
20
19
TCC
VDD
Vss
P50
P51
P53
P60/INT
P61
P62
P63
P64
P52
/RESET
OSCI
OSCO
P67
P66
P65
1
2
3
4
5
6
7
8
9
16
15
14
13
12
11
10
17
18
20
19
Vss
VDD
Fig. 1 Pin Assignment
Table 1 EM78P156ELP and EM78P156ELM Pin Description
Symbol
Pin No.
Type
Function
VDD
14
-
* Power supply.
OSCI
16
I
* XTAL type: Crystal input terminal or external clock input pin.
* ERC type: RC oscillator input pin.
OSCO
15
I/O
* XTAL type: Output terminal for crystal oscillator or external clock input pin.
* RC type: Instruction clock output.
* External clock signal input.
TCC
3
I
* The real time clock/counter (with Schmitt trigger input pin), must be tied to
VDD or VSS if not in use.
/RESET
4
I
* Input pin with Schmitt trigger. If this pin remains at logic low, the controller
will also remain in reset condition.
P50~P53
17, 18,
1, 2
I/O
* P50~P53 are bi-directional I/O pins.
* P50 and P51 can also be defined as the R-option pins.
* P50~P52 can be pulled-down by software.
P60~P67
6~13
I/O
* P60~P67 are bi-directional I/O pins.
* These can be pulled-high or can be open-drain by software programming.
* P60~P63 can also be pulled-down by software.
/INT
6
I
* External interrupt pin triggered by falling edge.
VSS
5
-
* Ground.
This specification is subject to change without prior notice.
07.29.2004 (V1.3)
6



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