EM78P259N/260N
8-Bit Microprocessor with OTP ROM
5
Pin Description
5.1
VDD
OSCI
EM78P259NP/M Pin Description
Pin No.
14
16
Symbol
Type
–
I
Power supply
Function
■
XTAL type Crystal input terminal or external clock input pin
■
RC type:
RC oscillator input pin
■
XTAL type: Output terminal for crystal oscillator or external
clock input pin
■
RC type:
Clock output with a duration one instruction cycle
■
External clock signal input
OSCO
15
I/O
P70
15
I/O
■
General-purpose I/O pin
■
Default value at power-on reset
■
General-purpose I/O pin
■
Open drain
■
Default value at power-on reset
■
General-purpose I/O pin
P60 ~ P67
6 ~ 13
I/O
P50 ~ P55
1~3
16 ~ 18
I/O
■
Pull-high/pull-down
■
Wake up from sleep mode when the status of the pin changes
■
Default value at power-on reset
■
“–“
→
the input pin of Vin– of a comparator
■
“+”
→
the input pin of Vin+ of a comparator
■
Pin CO is the output of the comparator
■
Defined by IOC80 <4:3>
■
IR mode output pin. Capable of driving and sinking
current = 20mA when the output voltage drops to 0.7Vdd and
rise to 0.3Vdd at Vdd = 5V.
■
External reference voltage for ADC
■
Defined by ADCON (R9)<7>
■
External interrupt pin triggered by falling or rising edge
■
Defined by CONT <7>
■
External Counter input
■
TCC defined by CONT<5>
CIN–, CIN+
CO
12, 11
10
I
O
IR OUT
13
O
VREF
/INT
TCC, TCCA,
TCCB, TCCC
3
6
3, 7,
8, 9
I
I
I
■
TCCA defined by IOC80 <1>
■
TCCB defined by IOC90 <5>
■
TCCC defined by IOC90 <1>
ADC0 ~ ADC3
1, 2,
17, 18
I
■
Analog to Digital Converter
■
Defined by ADCON (R9)<1:0>
■
If it remains at logic low, the device will be reset
■
Wake-up from sleep mode when pin status changes
■
Voltage on /RESET/Vpp must not exceed Vdd during normal
mode
Ground
Product Specification (V1.0) 06.16.2005
(This specification is subject to change without further notice)
/RESET
4
I
VSS
4
•
5
–
EMC [ ELAN MICROELECTRONICS CORP ]
