3803 Datasheet, PDF (17/119 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

3803 Group (Spec.L)
(1) Ports P0, P6
Pull-up control bit
Data bus
Direction
register
Port latch
(2) Ports P10, P11, P42, P43, P57
Pull-up control bit
Data bus
Direction
register
Port latch
A/D converter input
Analog input pin
selection bit
(3) Ports P12 to P17, P2
Pull-up control bit
Data bus
Direction
register
Port latch
Interrupt input
(4) Ports P30, P31
Pull-up control bit
Data bus
Direction
register
Port latch
(5) Ports P32, P33
Data bus
Direction
register
Port latch
D/A converter output
DA1 output enable bit (P30)
DA2 output enable bit (P31)
(6) Ports P34, P44
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 13. Port block diagram (1)
Rev.1.00 Apr 2, 2007 Page 17 of 117
REJ03B0212-0100
Serial I/O input
(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
Pull-up control bit
Data bus
Port latch
Serial I/O clock output
Serial I/O external clock input