EM78451AP EMC [ELAN Microelectronics Corp], EM78451AP Datasheet - Page 7

• Manufacturer Part Number: EM78451AP
• Description: 8-Bit Microcontroller
• Manufacturer: EMC [ELAN Microelectronics Corp]

4
Product Specification (V1.2) 05.27.2004
(This specification is subject to change without further notice)
P60~P67
P50~P57
Symbol
DATA
VDD
SDO
VSS
SCK
/INT
SDI
/SS
FUNCTION DESCRIPTION
O scillator/
W ake Up
Tim m ing
Control
Control
Sleep
&
Tim e-out
Pin No.
27~34
11~18
P
5
0
W DT
P
5
1
38
10
IOC5
P
5
2
3
1
2
7
8
9
R5
P
5
3
P
5
4
R1(TCC)
P
5
5
P
5
6
P
5
7
Prescaler
Type
I/O
I/O
I/O
I/O
I/O
I/O
I/O
-
-
I
P
6
0
P
6
1
P
6
2
IOC6
R6
P
6
3
P
6
4
RAM
P
6
5
P
6
6
R4
P
6
7
/ INT
Fig. 2 Functional Block Diagram
and it is also a pin-change wake-up pin.
and pin-change wake-up pins.
software.
falling edge. Users can enable it by software. The internal pull-up resistor
is around 50K ohm.
Interrupt
By connecting P75 and P77 together, P75 can be pulled-high by software
P77 can be defined as an open-drain output.
General bi-directional port. All of its pins can be pulled-high by software,
General bi-directional I/O port. All of its pins can be pulled-high * * by
Power supply pin.
Ground pin.
An interrupt schmitt-triggered pin. The function of interrupt triggers at the
Serial data in for SPI
Serial data out for SPI.
Serial clock for SPI.
/Slave select for SPI.
Control
W DT Tim er
P
7
0
IOC7
R7
P
7
1
DAT A & CONT ROL BUS
P
7
2
Instruction
Instruction
Register
Decoder
ROM
P
8
0
Function Description
P
8
1
P
8
2
IOC8
R8
P
8
3
P
8
4
P
8
5
P
8
6
P
8
7
P C
P
9
0
R3
P
9
1
IOC9
P
9
2
/
S
D
I
R9
P
9
3
/
S
D
O
P
9
4
/
S
C
K
P
5
5
/
/
S
S
8-Bit Microcontroller
ALU
STACK 1
STACK 2
STACK 3
STACK 4
STACK 5
ACC
ENG IN
SPI
EM78451
TM R1
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