DS707 Datasheet, PDF (13/20 Pages) Xilinx, Inc – Configurable as single or dual port PS2 controller

LogiCORE IP XPS PS2 Controller (v1.01b)
Table 8: XPS PS2 Status Register Description
Bit(s)
Name
Core
Access
Reset
Value
0 to 29
Unused
N/A
0
30
TXx_Full_Status Read
’0’
31
RXx_Full_Status Read
’0’
Description
Unused
PS2 Portx SIE is busy. This field is set when the data to be
transmitted is written into the transmit register. This is field is cleared
when the transmission is done. The software has no direct write
permission to change this field, since this field is set by the state
machine in the SIE. However, the software can indirectly do that by
using the Soft Reset Register
This field is set when the data packet is received by the Portx SIE
and is waiting for the host to read this data packet. This field is
cleared once the data packet is read by the host. The software has
no direct write permission to change this field, since this field is set
by the state machine in the SIE. However, the software can indirectly
do that by using the Soft Reset Register
XPS PS2 Portx Receive Data Register
XPS PS2 Portx Receive Data Register is used to read the data line during device-to-host communication. The device
writes the data into this register and the host reads back the data from this register to perform the appropriate
functions. Table 9 gives a detailed description of the XPS PS2 Portx Receive Data Register.
The XPS PS2 Portx Receive Data Register is shown in Figure 6.
X-Ref Target - Figure 6
Unused
RXx_DATA
00
23 24
31
DS707_06_041910
Figure 6: XPS PS2 Receive Data Register
Table 9: XPS PS2 Receive Data Register Description
Bit(s)
Name
Core Access Reset Value
0 to 23
Unused
N/A
0
24 to 31
RXx_DATA
Read
0
Description
Unused
PS2 Portx Receive Data from the device to host
XPS PS2 Portx Transmit Data Register
XPS PS2 Portx Transmit Data Register is drive the data line during host-to-device communication. The host writes
the data into this register and the SIE transmits the data on the data line for the device to perform the necessary
function. Table 10 gives a detailed description of the XPS PS2 Portx Transmit Data Register.
The XPS PS2 Portx Transmit Data Register is shown in Figure 7
X-Ref Target - Figure 7
Unused
TXx_DATA
00
23 24
31
DS707_07_041910
Figure 7: XPS PS2 Transmit Data Register
DS707 April 19, 2010
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Product Specification