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HD6417751 Datasheet, PDF (748/1105 Pages) Renesas Technology Corp – SuperH RISC engine
18.1.2 Block Diagrams
Figure 18.1 is a block diagram of the 16-bit general-purpose I/O port A with interrupt function.
PBnPUP
PORTEN
Pull-up resistor
Interrupt
controller
Internal bus
0
ADn output data
DQ
1
PDTRW C
BCK
0
ADnDIR
1
PBnIO
PTIRENn
0
Data input strobe
1
Q
C
D
PORTEN
PBnPuP
DnDIR
PBnIO
PTIRENn
0: Port not available
0: Pull-up
0: Input
0: Input
0: Interrupt input disabled
1: Port available
1: Pull-up off
1: Output
1: Output
1: Interrupt input enabled
Figure 18.1 16-Bit Port A
Port 15 (input/
output)/AD15
to
Port 0 (input/
output)/AD0
BCK
Rev. 3.0, 04/02, page 708 of 1064