Pin Assignments - Elan EM78P156EL Manual

3. PIN ASSIGNMENTS

EM78P156ELP
EM78P156ELM
P52 1
P53 2
TCC 3
/RESET 4
VSS 5
P60//INT 6
P61 7
P62 8
P63 9
DIP
SOP
SOIC
Table 1 EM78P156ELP and EM78P156ELM Pin Description
Symbol Pin No.
VDD 14
OSCI 16
OSCO 15
TCC 3
/RESET 4
17, 18,
P50~P53
1, 2
P60~P67 6~13
/INT 6
VSS 5
This specification is subject to change without prior notice.
18 P51 NC
17 P50 P52
16 OSCI P53
15 OSCO TCC
14 VDD /RESET
13 P67 VSS
12 P66 P60//INT
11 P65 P61
10 P64 P62
P63
Type
- * Power supply.
* XTAL type: Crystal input terminal or external clock input pin.
I
* ERC type: RC oscillator input pin.
* XTAL type: Output terminal for crystal oscillator or external clock input pin.
I/O
* RC type: Instruction clock output.
* External clock signal input.
* The real time clock/counter (with Schmitt trigger input pin), must be tied to
I
VDD or VSS if not in use.
* Input pin with Schmitt trigger. If this pin remains at logic low, the controller
I
will also remain in reset condition.
* P50~P53 are bi-directional I/O pins.
I/O
* P50 and P51 can also be defined as the R-option pins.
* P50~P52 can be pulled-down by software.
* P60~P67 are bi-directional I/O pins.
I/O * These can be pulled-high or can be open-drain by software programming.
* P60~P63 can also be pulled-down by software.
I * External interrupt pin triggered by falling edge.
- * Ground.
EM78P156ELAS
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
SSOP
Fig. 1 Pin Assignment
Function
4
EM78P156EL
EM78P156ELKM
NC P52
P51 P53
P50 TCC
OSCI /RESET
OSCO VSS
VDD VSS
P67 P60//INT
P66 P61
P65 P62
P64 P63 10
OTP ROM
1 20 P51
2 19 P50
3 18 OSCI
4 17 OSCO
5 16 VDD
6 15 VDD
7 14 P67
8 13 P66
9 12 P65
11 P64
SSOP
2002/04/19