EM78156EAS EMC [ELAN Microelectronics Corp], EM78156EAS Datasheet - Page 6

• Manufacturer Part Number: EM78156EAS
• Description: 8-Bit Microcontroller with MASK ROM
• Manufacturer: EMC [ELAN Microelectronics Corp]

EM78156E
8-Bit Microcontroller with MASK ROM
3
2 •
P60/INT
/RESET
Symbol
VDD
OSCI
OSCO
TCC
/RESET
P50~P53
P60~P67
/INT
VSS
TCC
P52
P53
P61
P62
P63
Vss
PIN ASSIGNMENT
Pin No.
1
2
3
4
5
6
7
8
9
14
16
15
3
4
17, 18,
1, 2
6~13
6
5
Table 1 EM78156EP and EM78156EM Pin Description
2 programmable R-option pins
Package types:
•
•
•
•
99.9% single instruction cycle commands
The transient point of system frequency between HXT and LXT is around 400KHz
Type
13
12
11
10
18
17
16
15
14
18 pin DIP 300mil : EM78156EP
18 pin SOP(SOIC) 300mil : EM78156EM
20 pin SSOP 209mil : EM78156EAS
20 pin SSOP 209mil : EM78156EKM
I/O
I/O
I/O
-
I
I
I
I
-
OSCO
VDD
P51
P50
P67
P66
P65
P64
OSCI
■ Power supply.
■ XTAL type: Crystal input terminal or external clock input pin.
■ ERC type: RC oscillator input pin.
■ XTAL type: Output terminal for crystal oscillator or external clock input pin.
■ RC type: Instruction clock output.
■ External clock signal input.
■ The real time clock/counter (with Schmitt trigger input pin), must be tied to
■ Input pin with Schmitt trigger. If this pin remains at logic low, the controller
■ P50~P53 are bi-directional I/O pins.
■ P50 and P51 can also be defined as the R-option pins.
■ P50~P52 can be pulled-down by software.
■ P60~P67 are bi-directional I/O pins.
■ These can be pulled-high or can be open-drain by software programming.
■ P60~P63 can also be pulled-down by software.
■ External interrupt pin triggered by falling edge.
■ Ground.
VDD or VSS if not in use.
will also remain in reset condition.
P60/INT
/RESET
TCC
P52
P53
P61
P62
P63
NC
Vss
Fig. 1 Pin Assignment
10
1
2
3
4
5
6
7
8
9
(This specification is subject to change without further notice)
13
12
20
19
18
17
16
15
14
11
Function
NC
OSCO
VDD
P51
P50
P67
P66
P65
P64
OSCI
Product Specification (V1.3) 07.29.2004
P60/INT
/RESET
TCC
P52
P53
P61
P62
P63
Vss
Vss
10
1
2
3
4
5
6
7
8
9
13
12
20
19
18
17
16
15
14
11
P51
P50
OSCO
VDD
VDD
P67
P66
P65
P64
OSCI