3803_03 Datasheet, PDF (21/136 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

3803/3804 Group
(1) Ports P0, P6
Data bus
Pull-up control bit
Direction
register
Port latch
(2) Ports P10, P11, P42, P43, P57
Pull-up control bit
Direction
register
Data bus
Port latch
A-D converter input
Analog input pin
selection bit
(3) Ports P12 to P17, P2
Pull-up control bit
Direction
register
Data bus
Port latch
Interrupt input
(4) Ports P30, P31
Data bus
Pull-up control bit
Direction
register
Port latch
(5) Ports P32, P33
Data bus
Direction
register
Port latch
(6) Ports P34, P44
D-A converter output
DA1 output enable (P30)
DA2 output enable (P31)
Pull-up control bit
Serial I/O enable bit
Receive enable bit
Direction
register
Data bus
Port latch
(7) Ports P35, P45
Serial I/O enable bit
Transmit enable bit
Direction
register
Data bus
Port latch
Pull-up control bit
P-channel output
disable bit
Serial I/O output
Fig. 16 Port block diagram of 3803 group (1)
(8) Ports P36, P46
Serial I/O synchronous clock
selection bit
Serial I/O enable bit
Serial I/O mode selection bit
Serial I/O enable bit
Direction
register
Data bus
Port latch
Serial I/O input
Pull-up control bit
Serial I/O clock output
Serial I/O external clock input
Rev.4.01 Nov 14, 2003 page 21 of 136