upd17072 Renesas Electronics Corporation., upd17072 Datasheet - Page 58
upd17072
Manufacturer Part Number
upd17072
Description
4-bit Single-chip Microcontroller With Hardware For Digital Tuning System
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD17072.pdf
(226 pages)
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10.2 General-Purpose I/O Ports (P0B, P0C, P0D)
10.2.1 Configuration of I/O ports
10.2.2 Use of I/O ports
reads the data is executed.
58
The configurations of the I/O ports are shown below.
The I/O port is set in the input or output mode by the I/O select registers P0B and P0C of the control register.
P0D, P0C, and P0D are the bit I/O ports. Therefore, these ports can set in input or output mode in 1-bit units.
To set output data or to read input data, data is written to the corresponding port register, or an instruction that
10.2.3 describes the configuration of the I/O select register of each port.
10.2.4 describes how to use an I/O port as an input port.
10.2.5 describes how to use an I/O port as an output port.
P0B (P0B3, P0B2, P0B1, P0B0)
P0C (P0C1, P0C0)
P0D (P0D3, P0D2)
V
V
DD
DD
RESET
I/O mode selector flag
Output
latch
1
0
Write instruction
Read instruction
Port register
(1 bit)
PD17072,17073
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