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SMP7500 Programming
37
CONTROL REGISTER PORT 11 thru 0 – Read and Write
D0
PORT Inn/Out Select
Set to 0 to allow F/P control line to determine Port direction. Set to 1
to set Port to Output.
Note
: This bit overrides the F/P In/Outn line.
Pon state = 0
D1
PORT Register Out Select
Set to 0 for immediate Port operation.
Set to 1 for double buffered Port operation.
Pon state = 0
D2
PORT Polarity Select
Set to 0 for non-inverted Port operation.
Set to 1 for inverted Port operation.
Pon state = 0
D4-D3
PORT Clock to PORT
Output Select
Value
Clock selected
0
F/P CLK 11/0 respectively
1
Relay Register Write Event MUX
2
Relay Register 000Ch Write Event
3
F/P CLK Select MUX
Pon state = 0
D5
PORT Clock to PORT
Output Polarity Select
Set to 0 for non-inverted Port Clock operation.
Set to 1 for inverted Port Clock operation.
Pon state = 0
D7-D6
PORT Output Clock
Select
Value
Clock selected
0 GND
1
Relay Register Write Event MUX
2
Relay Register 000Ch Write Event
3
F/P CLK Select MUX
When the F/P CLK Select MUX is selected, the Port Output Clock
follows directly the F/P CLK selected. When the Relay Register
Write Event MUX or Relay Register 000Ch Write Event are
selected, the Port Output Clock will produce a 250 ns pulse at the
event selected.
Pon state = 0
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