EM78P156E Ver la hoja de datos (PDF) - ELAN Microelectronics
Número de pieza
componentes Descripción
Fabricante
EM78P156E Datasheet PDF : 28 Pages
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EM78P156E
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 Fig.6 and Fig.7(a), 7(b) respectively.
PCRD
QP D
R
Q
C CLK
L
PCWR
PORT
0M
1U
X
QP D
R
Q
C CLK
L
PDWR
PDRD
IOD
*Pull-down is not shown in the figure.
Fig. 6 The circuit of I/O port and I/O control register for Port 5
PCRD
P60, /INT
PORT
Bit 6 of IOCE
D
P
RQ
CLK
C
L
Q
Q
P
R
D
CLK
QC
L
PCWR
0
M
1U
X
Q
P
R
D
CLK
QC
L
PDWR
PDRD
IOD
TI0
D
P
R
Q
CLK
C
L
Q
INT
*Pull-high (down) and open-drain are not shown in the figure.
Fig. 7(a) The circuit of I/O port and I/O control register for P60(/INT)
* This specification is subject to be changed without notice. 8.11.1999
B3-10
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