EM78156EAS EMC [ELAN Microelectronics Corp], EM78156EAS Datasheet - Page 17

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

Product Specification (V1.3) 07.29.2004
(This specification is subject to change without further notice)
P O R T
P 6 0 / I N T
B i t 6 o f I O C E
P O R T
D
C L K
R-option mode, the current/power consumption by Rex should be taken into the
consideration to promote energy conservation.
The I/O registers and I/O control registers are both readable and writable. The I/O
interface circuits for Port 5 and Port 6 are shown in the following Figures 6, 7(a), 7(b),
7(C)and Figure 8.
Fig. 7(a) The Circuit of I/O Port and I/O Control Register for P60(/INT)
NOTE: Pull-high (down) and Open-drain are not shown in the figure.
P
R
C
L
Fig. 6 The Circuit of I/O Port and I/O Control Register for Port 5
Q
Q
_
I N T
NOTE: Pull-down is not shown in the figure.
0
1
M
U
X
0
1
M
U
X
Q
Q
Q
_
Q
P C R D
_
D
C L K
C
P
R
L
P
R
C
L
C L K
C L K
Q
Q
Q
Q
P
R
C
L
_
_
D
D
P C R D
C L K
C L K
P
R
C
P
R
C
L
Q
Q
L
_
P D R D
D
D
PC W R
PD W R
8-Bit Microcontroller with MASK ROM
P C W R
P D W R
P D R D
I O D
T 1 0
IO D
EM78156E
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