321
Reset
WDDR8
Reset
WDR8
P8n
RDR8
RPOR8
*
EXDMA controller
EXDMA transfer acknowledge
EXDMA transfer acknowledge
enable
Mode 7
Modes 1, 2, 4, 5, 6
System controller
EXPE
WDDR8: Write to P8DDR
WDR8:
Write to P8DR
RPOR8: Read port 8
RDR8: Read
P8DR
n = 4 or 5
Interrupt controller
ITSn
IRQn
R
P8nDDR
C
Q
D
R
P8nDR
C
Q
D
Internal data bus
Note:
*
Output enable signal
Priority order: Modes 1, 2, 4, 5, 6, 7 (EXPE = 1)
EXDMAC
>
DR
Mode 7 (EXPE = 0)
DR
Figure 5.43 Port 8 Block Diagram (c) (Pins P84 and P85)
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