PD17012_15 Datasheet, PDF (82/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
10.3 General-Purpose I/O Ports (P0A, P0B, P1A, and P1D)
10.3.1 Configuration of I/O ports
The following paragraphs (1) through (3) indicate the configuration of the I/O ports.
(1) P0A (P0A2, P0A1, and P0A0 pins),
P0B (P0B3, P0B2, P0B1, and P0B0 pins),
P1A (P1A2, P1A1, and P1A0 pins)
VDD
I/O select flag
Output latch
Write instruction
VDD
RESET
Port register
(1 bit)
1
Read instruction
0
(2) P1D (P1D3, P1D2, P1D1, and P1D0 pins)
VDD
I/O select flag
Output latch
Write instruction
Port register
(1 bit)
VDD
1
Read instruction
0
80
Data Sheet U10101EJ4V0DS