FEDL9205-03
1
Semiconductor
ML9205-01
4. General output port set
(Specifies the general output port status.)
The general output port is an output for 4-bit static operation.
It is used to control other I/O devices and turn on LED. (static operation)
When at the "High" level, this output becomes the VDD voltage, and when at the "Low" level, it becomes the
ground potential. Therefore, the fluorescent display tube cannot be driven.
[Command format]
LSB
MSB
B0 B1 B2 B3 B4 B5 B6 B7
P1 P2 P3 P4
1st byte
: selects a general output port and specifies
the output status
0
0
1
*
P1 to P4 : general output ports
: Don't care
*
[Set data and set state of general output port]
Pn
0
Display state of general output port
Sets the output to Low
(The state when power is applied or when RESET is input.)
1
Sets the output to High
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