XR22804 Datasheet, PDF (45/47 Pages) Exar Corporation – Hi-Speed USB to 10/100 Ethernet Bridge with 4 UARTs

XR22804
EDGE_PWM1_CTRL (0x3DB) - Read/Write
Bit
15:9
8:6
4:0
Default
Description
0x00
Reserved
These bits are reserved and should be written as ‘0’.
0x0
Cmd
000: Idle. output pin remains at same state
001: Undefined, do not use
010: Undefined, do not use
011: Undefined, do not use
100: Assert logic ‘0’
101: One-shot -If previous state was assert ’0’, one-shot pulse will be high, If previous state was assert ’1’, one-
shot pulse will be low
110: Free run output
111: Assert logic ‘0’
0x00
Pin
Specifies which pin (E31 - E0) will be assigned to PWM1 output.
EDGE_PWM1_HIGH (0x3DC) - Read/Write
Bit
15:12
11:0
Default
Description
0x0
Reserved
These bits are reserved and should be written as ‘0’.
0x001
Value
This register specifies the high period for PWM1 in increments of 266.667ns. High period must be in the range
of 1 to 4095 (266.667 ns to 1.092 ms)
EDGE_PWM1_LOW (0x3DD) - Read/Write
Bit
15:12
11:0
Default
Description
0x0
Reserved
These bits are reserved and should be written as ‘0’.
0x001
Value
This register specifies the low period for PWM1 in increments of 266.667ns. Low period must be in the range of
1 to 4095 (266.667 ns to 1.092 ms)
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