MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 72

• Manufacturer Part Number: MC-78F0712-KIT
• Description: KIT REF SYSTEM 78K0 UPD78F0712
• Manufacturer: Renesas Electronics America

Specifications of MC-78F0712-KIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.4
4.4.1
(1) Output mode
(2) Input mode
4.4.2
(1) Output mode
(2) Input mode
4.4.3
(1) Output mode
(2) Input mode
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Port operations differ depending on whether the input or output mode is set, as shown below.
Caution In the case of a 1-bit memory manipulation instruction, although a single bit is manipulated, the
A value is written to the output latch by a transfer instruction, and the output latch contents are output from the pin.
Once data is written to the output latch, it is retained until data is written to the output latch again.
The data of the output latch is cleared by reset.
A value is written to the output latch by a transfer instruction, but since the output buffer is off, the pin status does
not change.
Once data is written to the output latch, it is retained until data is written to the output latch again.
The output latch contents are read by a transfer instruction. The output latch contents do not change.
The pin status is read by a transfer instruction. The output latch contents do not change.
An operation is performed on the output latch contents, and the result is written to the output latch. The output
latch contents are output from the pins.
Once data is written to the output latch, it is retained until data is written to the output latch again.
The data of the output latch is cleared by reset.
The pin level is read and an operation is performed on its contents. The result of the operation is written to the
output latch, but since the output buffer is off, the pin status does not change.
Port Function Operations
Writing to I/O port
Reading from I/O port
Operations on I/O port
port is accessed as an 8-bit unit. Therefore, on a port with a mixture of input and output pins,
the output latch contents for pins specified as input are undefined, even for bits other than the
manipulated bit.
CHAPTER 4 PORT FUNCTIONS
User’s Manual U17890EJ2V0UD