Adaptec 1737100 Programmer Manual - Page 100
Type: R/W, Internal Registers Subgroup: Ethernet Functional Registers, Byte Address: 74h - 77h
![]() |
UPC - 760884136362
View all Adaptec 1737100 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 100 highlights
AIC-6915 Ethernet LAN Controller Programmer's Manual TimersControl Register Type: R/W Internal Registers Subgroup: Ethernet Functional Registers Byte Address: 74h - 77h Table 7-40. TimersControl Register Reset Bit(s) rw value Description/Function 31 r/w 0 EarlyRxQ1IntDelayDisable: When set, the interrupt masking timer has no effect on EarlyRxQ1Int. 30 r/w 0 RxQ1DoneIntDelayDisable: When set, the interrupt masking timer has no effect on RxQ1DoneInt. 29 r/w 0 EarlyRxQ2IntDelayDisable: When set, the interrupt masking timer has no effect on EarlyRxQ2Int. 28 r/w 27 r 0 RxQ2DoneIntDelayDisable: When set, the interrupt masking timer has no effect on RxQ2DoneInt. 0 Reserved: Always reads 0. 26 r/w 25 r/w 24 r/w 0 TimeStampResolution: Specifies the resolution of the time stamp recorded in the long format transmit completion descriptor. The recorded time stamp is a 13-bit number equal to CurrentTime[12:0] if TimeStampResolution is reset (0), otherwise it is equal to CurrentTime[20:8]. The long-format receive completion descriptors always include the full 32-bit CurrentTime. 0 GeneralTimerResolution: Specifies the resolution of GeneralTimer, that controls the spacing of GeneralTimerInt. When the bit is cleared the timer has a resolution of 24 TimerClock periods (12.8 µs). When the bit is set the resolution is 29 TimerClock periods (0.4096 ms). 0 OneShotMode: Specifies the GeneralTimer operation mode. If the bit is set, only one interrupt is produced when the timer reaches its terminal count, else the GeneralTimer continuously produces interrupts every period as defined by GeneralTimerResolution and GeneralTimerInterval bits. 23:16 r/w 0 GeneralTimerInterval: Specifies the spacing between two consecutive assertions of the interrupt status bit, GeneralTimerInt. A default value '0' does not delay the assertion of the interrupt status bit. If the TimerClock period is ~0.8 µS and the GeneralTimer is running at high resolution mode (GeneralTimerResolution=1), the interrupt spacing range is: 12.8 µs - 3.264 ms. For the low resolution mode the range is: 0.4096 mS - 104.8 ms. The general timer starts when this field is not 0. 15 r/w 0 TxFrameCompleteIntDelayDisable: When set, the interrupt masking timer has no effect on TxFrameCompleteInt. 14 r/w 0 TxQueueDoneIntDelayDisable: When set, the interrupt masking timer has no effect on TxQueueDoneInt. 13 r/w 0 TxDmaDoneIntDelayDisable: When set, the interrupt masking timer has no effect on TxDmaDoneInt. 7-28
![](/manual_guide/products/adaptec-1737100-programmer-manual-d6d6d7d/100.png)