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10.8.4
Operation
Port 7 can be used by the PMRB as a realtime output port or an I/O port.
Port 7 functions as a realtime output port when PMRB=1 and functions as an I/O port when
PMRB=0. Figure 10.3 show the block diagram of port 7.
RTPEGR write
RTPSR2 write
PMRA write
PDR7 write
PDR7 read
PCR7 write
[Legend]
PMRB:
Port mode register B
PCR7:
Port control register 7
PDR7:
Port data register 7
PCRS7:
Port control register slave 7
PDRS7:
Port data register slave 7
Internal
trigger HSW
CK
RTPEGR
CK
RTPSR2
CK
PMRB
CK
PDR7
Select
CK
PCR7
Figure 10.3 Block Diagram of Port 7
Select
CK
PDRS7
CK
PCRS7
RTPSR2:
Realtime output trigger select register
RTPEGR:
Realtime output trigger edge select register
HSW:
Internal trigger signal
RPTRG:
External trigger pin
External trigger
RPTRG
P7/RP
Rev. 1.0, 02/00, page 235 of 1141
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