EM78P350N
8-Bit Microprocessor with OTP ROM
5 Pin Description
5.1 EM78P350
Symbol
P50~P57
P60~P65
Pin No. Type
Function
11~12
16~17
8-bit General purpose input/output pins
Default value at power-on reset
I/O
24~27
6-bit General purpose input/output pins
Default value at power-on reset
18~23
I/O
I/O
P70~P71
P73~P76
28, 1
2~5
6-bit General purpose input/output pins
Default value at power-on reset
6~8
5-bit General purpose input/output pins
Default value at power-on reset
P80 ~ P84
INT0, INT1
Ain0~Ain5
I/O
10, 15
16, 17
I
I
External interrupt pin triggered by falling edge
6-bit Analog-to-Digital Converter
Defined by AISR (Bank 2 R8) <0 : 7>
18~22
28
1
PWM1
PWM2
Pulse width modulation outputs
O
O
I
Defined by PWMCON (Bank 1-R5)<5 : 7>
BO
10
Buzzer output driver
External reference voltage for ADC
Defined by ADCON (Bank 2 R9) <7>.
VREF
15
“-“ : the input pin of Vin- of the comparator
“+” : the input pin of Vin+ of the comparator
Pin CO is the comparator output
CIN-
CIN+
CO
I
I
O
24
25
26
Defined by CMPCON (IOCA) <0:1>
General-purpose Input only
If it remains at logic low, the device will be reset
Wake-up from sleep mode when pin status changes
Voltage on /RESET must not exceed Vdd during normal
mode
/RESET
9
I
Real time clock/counter with Schmitt Trigger input pin. It
must be tied to VDD or VSS if not in use.
TCC
27
5
I
I
I
CNTR1
Sin
Counter 1 / Counter 2 with Schmitt Trigger input pin.
Sin pin is used to input serial data signals by software.
Sin pin is also used as port P82.
8
Sout pin is used to input serial data signals by software.
Sout pin is also used as port P81.
Sout
Sck
7
6
O
Sck pin is used to input and output synchronous clock
signals for serial data transfer by software.
I/O
Sck pin is also used as Port P80.
Crystal type: Crystal input terminal or external clock input
OSCI
12
11
I
pin
RC type: RC oscillator input pin
Crystal type: Output terminal for crystal oscillator or external
clock input pin.
RC type: Clock output with a duration of one instruction
cycle time. The prescaler is determined by the
CONT register.
OSCO
O
External clock signal input.
XIN
I
Low crystal 32.768kHz input
Low crystal 32.768kHz output
Power supply
2
3
XOUT
VDD
VSS
O
–
–
14
13
Ground
4 •
Product Specification (V1.0) 09.14.2006
(This specification is subject to change without further notice)