Sundance Technology
ST201
PRELIMINARY draft 2
TXDMAPOLLPERIOD
Class | I/O Registers, DMA |
Base Address | IoBaseAddress register value |
Address Offset | 0x0a |
Access Mode | Read/Write |
Width | 8 bits |
The value in TxDMAPollPeriod determines the interval at which the current TFD is polled. When a zero TxDMANextPtr is fetched from the current TFD, TxDMANextPtr is polled to determine when a new TFD is ready to be processed. Polling is disabled when TxDMAPollPeriod is cleared. TxDMAPollPeriod is cleared by reset. The value in TxDMAPollPeriod represents a multiple of 320 ns time intervals. The maximum value is 127 (or 40.64 us).
BIT
6..0
7
BIT NAME
TxDMAPollPeriod
Unused
BIT DESCRIPTION
The number of 320ns intervals between polls of the TxDMANextPtr field of the current TFD.
This bit is ignored.
80
