38K2 Datasheet, PDF (14/151 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

38K2 Group
(7) Port P40
Serial I/O enable bit
Receive enable bit
External bus interface enable bit
Direction register
Data bus
Port latch
VCCE
(11) Ports P50, P52
Pull-up control bit
Direction register
Data bus
Port latch
EXDreq output
Serial I/O input
(8) Port P41
Serial I/O enable bit
Receive enable bit
External bus interface enable bit
Direction register
Data bus
Port latch
INT0 (P50), INT1 (P52) interrupt input
VCCE
(12) Port P51
Direction register
Data bus
Port latch
Serial I/O output
EXDack
(9) Port P42
Serial I/O enable bit
Serial I/O mode selection bit
Serial I/O synchronous clock selection bit
Serial I/O enable bit
External bus interface enable bit
Direction register
Data bus
Port latch
External bus interface enable bit
Pulse output mode
Timer output
CNTR0 interrupt input
(13) Ports P53–P57
VCCE
Data bus
Direction register
Port latch
Serial I/O clock output
Serial I/O external clock input
EXTC
(10) Port P43
Serial I/O mode selection bit
Serial I/O enable bit
SRDY output enable bit
External bus interface enable bit
Direction register
Data bus
Port latch
(14) Port P6
Serial I/O synchronous clock selection bit
External bus interface enable bit
Data bus
Direction register
Port latch
VCCE
Serial I/O output
EXA1
Fig. 11 Port block diagram (2)
External bus interface enable bit
Rev.3.00 Oct 15, 2006 page 14 of 147
REJ03B0193-0300