Xm_Vatp_Chan0/1_Status - Dynamic Engineering PMC-XM-DIFF User Manual

XM_VATP_CHAN0/1_STATUS

[0x040C, 0x0424] Channel Status Register (read only)
Data Bit
31-16
14-8
FIGURE 17
Transmit FIFO Empty: When read as a '1', the corresponding transmit FIFO is empty.
When read as a '0', the FIFO has at least one word in it.
Transmit FIFO Almost Empty: When read as a '1', the corresponding transmit FIFO is
almost empty as determined by the almost empty field in the control register. When
read as a '0', there is more data in the FIFO than specified in the control register.
Transmit FIFO Almost Full: When read as a '1', the corresponding transmit FIFO is
almost full. The almost full level is hard-coded to 4080 words. When read as a '0',
there are less than this number of words in the FIFO.
Transmit FIFO Full: When read as a '1', the corresponding transmit FIFO is full. When
read as a '0', there is room for at least one more word in the FIFO.
Receive FIFO Empty: When read as a '1', the corresponding receive FIFO is empty.
When read as a '0', the FIFO has at least one word in it.
Receive FIFO Almost Empty: When read as a '1', the corresponding receive FIFO is
almost empty. The almost empty level is hard-coded to 16 words. When read as a '0',
there are more than this number of words in the FIFO.
Receive FIFO Almost Full: When read as a '1', the corresponding receive FIFO is
almost full as determined by the almost full field in the control register. When read as a
Channel Status Register
15
7
6
5
4
3
2
1
0
PMC-XM VIRTEX (ATP) CHANNEL STATUS REGISTER
Embedded Solutions
Description
Spare
INT_STAT
Spare
Receive FIFO Full
Receive FIFO Almost Full
Receive FIFO Almost Empty
Receive FIFO Empty
Transmit FIFO Full
Transmit FIFO Almost Full
Transmit FIFO Almost Empty
Transmit FIFO Empty
Page 27 of 46