3804H Datasheet, PDF (15/116 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

3804 Group (Spec. H)
(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
I2C-BUS interface enable bit
Direction
register
Data bus
Port latch
SDA output
SCL output _{SDA input}
SCL input
(7) Ports P35, P45
Serial I/O enable bit
Transmit enable bit
Direction
register
Pull-up control bit
P-channel output
disable bit
Data bus
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
(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 output
Fig. 12 Port block diagram (1)
Serial I/O clock output
Serial I/O external clock input
Rev.1.01 Jan 25, 2005 page 15 of 114
REJ03B0131-0101Z