C.4
Port 7 Block Diagram
P7n
Legend
WDDR7
: Write to P7DDR
WDR7
: Write to P7DR
RDR7
: Read P7DR
RPOR7
: Read port 7
n= 0 or 1
Figure C-4 (a) Port 7 Block Diagram (Pins P70 and P71)
1314
Mode 7
Modes 4 to 6
Reset
R
Q
D
P7nDDR
C
WDDR7
Reset
R
Q
D
P7nDR
C
WDR7
Bus controller
Chip select
RDR7
RPOR7
DMA controller
DMA request input
8-bit timer
Reset/Count input