Elan EM78P156EL Manual page 5

Table 2 EM78P156ELAS Pin Description
Symbol Pin No.
VDD 15
OSCI 17
OSCO 16
TCC 4
/RESET 5
18, 19,
P50~P53
2, 3
P60~P67 7~14
/INT 7
VSS 6
Table 3 EM78P156ELKM Pin Description
Symbol Pin No.
VDD 15,16
OSCI 18
OSCO 17
TCC 3
/RESET 4
19, 20,
P50~P53
1, 2
P60~P67 7~14
/INT 7
VSS 5, 6
This specification is subject to change without prior notice.
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.
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.
Function
Function
5
EM78P156EL
OTP ROM
2002/04/19