em78p257 ELAN Microelectronics Corp, em78p257 Datasheet - Page 9

• Manufacturer Part Number: em78p257
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

This specification is subject to change without prior notice.
P70,P71
P60~P67
P50~P57
IR OUT
/INT
CIN1-, CIN1+
CIN2-, CIN2+
CIN3-, CIN3+
CIN4-, CIN4+
CO1,CO2
CO3,CO4
TCC
TCC1,TCC2
TCC3,TCC4
TCC5,TCC6
/RESET
VSS
17~20
17,18
13,12
10,11
19,18
7~14
16,5
19,2
8,13
1,20
1~4
4,3
8,9
14
7
4
5
6
I/O * General purpose I/O pin. (P71 is input pin only)
I/O * General purpose I/O pin.
I/O * General purpose I/O pin.
O
O
O
-
I
I
I
I
I
I
I
* RC type: clock output with a duration of one instruction cycle.
* External clock signal input.
* Default value after a power on reset.
* Open_drain.
* Default value after a power on reset.
* Pull_high/pull_down.
* Wake up from sleep mode when the status of the pin changes.
* Default value after a power on reset.
* IR mode output pin, capable of sinking 20mA
* External interrupt pin triggered by falling edge.
* “-“ -> the input pin of Vin- of a comparator.
* “+”-> the input pin of Vin+ of a comparator.
* Pin CO1~4 are the outputs of the comparators.
External Counter input.
* If set as /RESET and remains at logic low, the device will be reset.
* Voltage on /RESET/Vpp must not exceed Vdd during the normal
mode.
* Pull_high is on if defined as /RESET.
Ground.
9
EM78P257
07.27.2004 (V1.4)
OTP ROM