DS571 Datasheet, PDF (7/16 Pages) Xilinx, Inc – LogiCORE IP XPS UART Lite

LogiCORE IP XPS UART Lite (v1.02.a)
Table 3: XPS UART Lite Parameter-Port Dependencies (Cont’d)
Generic
or Port
Name
Affects Depends
Relationship Description
P36
Sl_MBusy[0 :
-
C_SPLB_NUM_MASTERS - 1]
G9
Width of the Sl_MBusy varies
according to
C_SPLB_NUM_MASTERS
P37
Sl_MWrErr[0 :
-
C_SPLB_NUM_MASTERS - 1]
G9
Width of the Sl_MWrErr varies
according to
C_SPLB_NUM_MASTERS
P38
Sl_MRdErr[0 :
-
C_SPLB_NUM_MASTERS - 1]
G9
Width of the Sl_MRdErr varies
according to
C_SPLB_NUM_MASTERS
P42
Sl_MIRQ[0 :
-
C_SPLB_NUM_MASTERS - 1]
G9
Width of the Sl_MIRQ varies according
to C_SPLB_NUM_MASTERS
XPS UART Lite Register Descriptions
Table 4 shows all the XPS UART Lite registers and their addresses.
Table 4: XPS UART Lite Registers
Base Address + Offset
(hex)
Register Name
Access Default
Type Value (hex)
Description
C_BASEADDR + 0x0
Rx FIFO⁽³⁾
Read⁽¹⁾ 0x0
Receive Data FIFO
C_BASEADDR + 0x4
Tx FIFO⁽³⁾
Write⁽²⁾ 0x0
Transmit Data FIFO
C_BASEADDR + 0x8
STAT_REG⁽³⁾
Read⁽¹⁾ 0x4
UART Lite Status Register
C_BASEADDR + 0xC
CTRL_REG⁽³⁾
Write⁽²⁾ 0x0
UART Lite Control Register
1. Writing of a read only register has no effect.
2. Reading of a write only register returns zero.
3. Registers are defined for full 32-bit access only. Any partial word accesses (byte or halfword) have undefined results and returns a
bus error.
Receive Data FIFO
This 16 entry deep FIFO contains data to be received by XPS UART Lite. The FIFO bit definitions are shown in
Table 5. Reading of this location will result in reading the current word out from the FIFO. When a read request is
issued to an empty FIFO a bus error is generated and the result is undefined. The Receive Data FIFO is a read-only
register. Issuing a write request to Receive Data FIFO will do nothing but generate the write acknowledgement.
Figure 2 shows the location for data on the PLB when C_DATA_BITS is set to 8.
X-Ref Target - Figure 2
Rx Data
0
23 24
31
Reserved
Figure 2: Receive Data FIFO (C_DATA_BITS = 8)
DS571 June 22, 2011
www.xilinx.com
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Product Specification