EM78451AP EMC [ELAN Microelectronics Corp], EM78451AP Datasheet - Page 6

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

EM78451
8-Bit Microcontroller
3
2 •
P90~P95
P80~P87
P70~P72
Symbol
R-OSCI
OSCO
S D O / P 9 3
S C K / P 9 4
CLK
S D I / P 9 2
S S / P 9 5
D A T A
PIN ASSIGNMENT
C L K
V S S
I N T
P 9 0
P 9 1
P 5 0
P 5 1
P 5 2
P 5 3
P 5 4
P 5 5
P 5 6
P 5 7
P 8 0
P 8 1
Pin No.
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
1
2
3
4
5
6
7
8
9
19~26
37~35
5~10
39
40
4
Table 1 Pin description
2 Open-drain pins.
2 R-option pins.
32 Programmable pull-high input pins.
Package types:
Four types of interrupts.
•
• 44 pin QFP : EM78451AQ.
•
•
•
•
Type
I/O
I/O
I/O
I/O
O
40 pin DIP 600mil : EM78451AP.
External interrupt (/INT).
SPI transmission completed interrupt.
TCC overflow interrupt.
Timer1 comparator match interrupt.
I
4 0
3 9
3 8
3 7
3 6
3 5
3 4
3 3
3 2
3 1
3 0
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
O S C O
P 7 1
P 7 2
P 6 7
P 6 6
P 6 5
P 6 4
P 6 3
P 6 2
P 6 1
P 6 0
P 8 7
P 8 6
P 8 5
P 8 4
P 8 3
P 8 2
R - O S C I
V D D
P 7 0
pull high for 1.8432MHz.
software.
software.
software defined.
pin.
In XTAL mode: Crystal input; In internal C, external R mode: 56K ohm±5%
In XTAL mode: Crystal output; In RC mode: Instruction clock output.
General bi-directional I/O port. All of its pins can be pulled-high by
P90 and P91 are pin-change wake-up pins.
General bi-directional I/O port. All of its pins can be pulled-high by
P80 and P81 are also used as the R-option pins.
LED direct-driving pin with internal serial resistor is used as output and is
By connecting P74 and P76 together.
P74 can be pulled-high by software and it is also a pin-change wake-up
P76 can be defined as an open-drain output.
Fig. 1 Pin assignment
S D O / P 9 3
S C K / P 9 4
S D I/ P 9 2
S S / P 9 5
P 9 0
P 9 1
P 5 0
P 5 1
P 5 2
P 5 3
P 5 4
(This specification is subject to change without further notice)
Function Description
1 0
1 1
1
2
3
4
5
6
7
8
9
Product Specification (V1.2) 05.27.2004
E M 7 8 4 5 1 A Q
3 3
3 2
3 1
3 0
2 9
2 8
2 7
2 6
2 5
2 4
2 3
P 7 1
P 7 2
P 6 7
P 6 6
P 6 5
P 6 4
P 6 3
P 6 2
P 6 1
P 6 0
P 8 7