© 2014 Exar Corporation
XR22801
37 / 40 exar.com/XR22801
Rev 1A
EDGE_PWM0_CTRL (0x3D8) - Read/Write
EDGE_PWM0_HIGH (0x3D9) - Read/Write
EDGE_PWM0_LOW (0x3DA) - Read/Write
Bit Default Description
15:9 0x00
Reserved
These bits are reserved and should be written as ‘0’.
8:6 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’
50
Enable
0: PWM0 output is not enabled
1: PWM0 output is enabled on pin specified in Pin field using mode specified in Cmd field
4:3 0x0
Reserved
These bits are reserved and should be written as ‘0’.
2:0 0x0
Pin
Specifies which pin (E7 - E0) will be assigned to PWM0 output.
Bit Default Description
15:12 0x0
Reserved
These bits are reserved and should be written as ‘0’.
11:0 0x001
Value
This register specifies the high period for PWM0 in increments of 266.667ns. High period must be in the range
of 1 to 4095 (266.667 ns to 1.092 ms)
Bit Default Description
15:12 0x0
Reserved
These bits are reserved and should be written as ‘0’.
11:0 0x001
Value
This register specifies the low period for PWM0 in increments of 266.667ns. Low period must be in the range of
1 to 4095 (266.667 ns to 1.092 ms)
