UPD17073 NEC, UPD17073 Datasheet - Page 59

• Manufacturer Part Number: UPD17073
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
• Manufacturer: NEC

10.2.3 Control register of I/O port
sets the input or output mode of each pin of P0C and P0D.
reset
At
Port 0B bit I/O
select register
(1) Port 0B bit I/O select register
The port 0B bit I/O select register sets the input or output mode of each pin of P0B. The port 0C bit I/O select register
The following paragraphs (1) and (2) describe the configuration and function.
Power-ON
Clock stop
CE
Name
b
B
B
O
0
1
0
0
0
P
0
3
I
3
Flag symbol
b
O
P
B
B
0
1
0
0
0
0
2
I
2
b
0
1
B
B
O
0
0
0
P
0
1
I
1
b
B
B
O
P
0
0
I
0
1
0
0
0
0
(BANK1)
Address
Sets P0B0 in input mode
Sets P0B0 in output mode
Sets P0B1 in input mode
Sets P0B1 in output mode
Sets P0B2/SCK in input mode
Sets P0B2/SCK in output mode
Sets P0B3/SI/SO1 in input mode
Sets P0B3/SI/SO1 in output mode
6EH
Read/
Write
R/W
Sets input or output mode
Sets input or output mode
Sets input or output mode
Sets input or output mode
PD17072,17073
59