PD17012_15 Datasheet, PDF (88/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
10.4 General-Purpose Input Ports (P0D and P1B)
10.4.1 Configuration of input ports
The following paragraphs (1) and (2) indicate the configuration of the input ports.
(1) P0D (P0D3, P0D2, P0D1, and P0D0 pins)
Write instruction
VDD
Port register
(1 bit)
Input
latch
Read instruction
High on resistance
(2) P1B (P1B3, P1B2, P1B1, and P1B0 pins)
To frequency counter or A/D converter
VDD
RESET
Key source signal timing output
RESET
Write instruction
Port register
(1 bit)
Read instruction
86
Data Sheet U10101EJ4V0DS