EM78P870
8-bit OTP Micro-controller
VI.Pin Descriptions
PIN
I/O
DESCRIPTION
POWER
VDD
AVDD
GND
AVSS
POWER
POWER
Digital power
Analog power
Digital ground
Analog ground
CLOCK
XIN
XOUT
I
O
I
Input pin for 32.768kHz oscillator
Output pin for 32.768kHz oscillator
Phase loop lock. Connect a capacitor 0.01u to 0.047u with GND.
PLLC
LCD
COM0..COM15
O
Common driver pins of LCD drivers
COM16..COM23 O (SEG0..SEG7)
COM16 to COM23 are shared with SEG0 to SEG7
SEG0..SEG7
O (COM16..COM23) Segment driver pins of LCD drivers
SEG8...SEG47
SEG48..SEG55
SEG56..SEG63
SEG64..SEG71
SEG72..SEG79
O
SEG0 to SEG7 are shared with COM16 to COM23
SEG48 to SEG79 are shared with IO PORT
O (I/O : PORTB)
O (I/O : PORTC)
O (I/O : PORT8)
O (I/O : PORT9)
VC1..VC5
I
Reference voltage input. Each one connect a capacitor (0.1u) with GND.
TONE, KTONE
TONE
KTONE
SERIAL IO
SCK
SDO
SDI
O
Programming tone output pin
Key tone output. Shared with PORT67
O (PORT67)
IO (PORT60)
O (PORT61)
I (PORT62)
Master : output pin, Slave : input pin. This pin is shared with PORT60.
Output pin for serial data transferring. This pin is shared with PORT61.
Input pin for receiving data. This pin shared with PORT62.
COMPARATOR
CMP1
CMP2
I (PORT63)
I (PORT64)
I (PORT65)
Comparator input pins. Shared with PORT63, PORT64 and PORT65.
CMP3
IO
P55 ~P57
P60 ~P67
I/O
I/O
PORT 5 can be INPUT or OUTPUT port each bit.
PORT 6 can be INPUT or OUTPUT port each bit.
Internal pull high.
P70 ~ P77
I/O
PORT 7 can be INPUT or OUTPUT port each bit.
Internal Pull high function.
Auto key scan function.
Interrupt function.
P80 ~ P87
P90 ~ P97
I/O
I/O
PORT 8 can be INPUT or OUTPUT port each bit.
Shared with LCD Segment signal.
PORT 9 can be INPUT or OUTPUT port each bit.
Shared with LCD Segment signal.
PB0 ~ PB7
PC0 ~ PC7
INT0
I/O
PORT B can be INPUT or OUTPUT port each bit.
Shared with LCD Segment signal.
I/O
PORT C can be INPUT or OUTPUT port each bit.
Shared with LCD Segment signal.
PORT70..73
Interrupt source which has the same interrupt flag. Any pin from
PORT70 to PORT73 has a falling edge signal, it will generate a
interruption.
INT1
PORT74..76
Interrupt source which has the same interrupt flag. Any pin from
PORT74 to PORT76 has a falling edge signal, it will generate a
interruption.
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* This specification is subject to be changed without notice.
5
8/19/2004 (V1.5)
ELAN [ ELAN MICROELECTRONICS CORP ]
