UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 102
UPD78F0413GA-GAM-AX
Manufacturer Part Number
UPD78F0413GA-GAM-AX
Description
8BIT UC, 32K FLASH, 1KB RAM, LCD
Manufacturer
NEC
Datasheet
1.UPD78F0413GA-GAM-AX.pdf
(562 pages)
Specifications of UPD78F0413GA-GAM-AX
Controller Family/series
UPD78F
No. Of I/o's
30
Ram Memory Size
1024Byte
Cpu Speed
10MHz
No. Of Timers
8
No. Of Pwm
RoHS Compliant
Core Size
8bit
Program Memory Size
32KB
Oscillator Type
External, Internal
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4.4 Port Function Operations
4.4.1 Writing to I/O port
(1) Output mode
(2) Input mode
4.4.2 Reading from I/O port
(1) Output mode
(2) Input mode
4.4.3 Operations on I/O port
(1) Output mode
(2) Input mode
102
Port operations differ depending on whether the input or output mode is set, as shown below.
Caution In the case of 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 when a reset signal is generated.
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 when a reset signal is generated.
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 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 U18698EJ1V0UD
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