3803_03 Datasheet, PDF (22/136 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

3803/3804 Group
(9) Port P37
Serial I/O3 mode
selection bit
Serial I/O3 enable bit
SRDY3 output enable bit
Direction
register
Pull-up control bit
Data bus
Port latch
Serial I/O3 ready output
(11) Port P41
Pull-up control bit
Port XC switch bit
Direction
register
Data bus
Port latch
INT00 interrupt input
Sub-clock generating circuit input
(13) Port P50
Pull-up control bit
Data bus
Direction
register
Port latch
Serial I/O2 input
Fig. 17 Port block diagram of 3803 group (2)
(10) Port P40
Pull-up control bit
Port XC switch bit
Direction
register
Data bus
Port latch
INT40 interrupt input
Oscillator
Port P41
Port XC switch bit
(12) Port P47
Timer Z operating
mode bits
Bit 2
Bit 1
Bit 0
Serial I/O1 mode selection bit
Serial I/O1 enable bit
SRDY1 output enable bit
Direction
register
Data bus
Port latch
Pull-up control bit
Timer output
Serial I/O1 ready output
CNTR2 interrupt input
(14) Port P51
Pull-up control bit
Serial I/O2 transmit completion signal
Serial I/O2 port selection bit
Data bus
Direction
register
Port latch
P-channel output
disable bit
Serial I/O2 output
Rev.4.01 Nov 14, 2003 page 22 of 136