318
Reset
WDDR7
Reset
WDR7
P7n
RDR7
RPFCR2
RPOR7
Reset
WPFCR2
DMA controller
*
DMA transfer acknowledge
enable
DMA transfer acknowledge
EXDMA controller
EXDMA transfer acknowledge
enable
EXDMA transfer acknowledge
Modes 1, 2, 4, 5, 6
Mode 7
System controller
EXPE
WDDR7: Write to P7DDR
WDR7:
Write to P7DR
WPFCR2: Write to PFCR2
RPOR7:
Read port 7
RDR7: Read
P7DR
RPFCR2: Read PFCR2
n = 4 or 5
R
P7nDDR
C
Q
D
R
P7nDR
C
Q
D
R
Q
D
C
DMACS
PFCR2
Internal data bus
Note:
*
Output enable signal
Priority order: Modes 1, 2, 4, 5, 6, 7 (EXPE = 1)
Mode 7 (EXPE = 1)
DMACS = 1
DMACS = 1
EXDMAC
>
DMAC
>
DR
DMAC
>
DR
DMACS = 0
DMACS = 0
EXDMAC
>
DR
DR
Figure 5.40 Port 7 Block Diagram (c) (Pins P74 and P75)
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