XR17V252 Datasheet, PDF (13/69 Pages) Exar Corporation – 66 MHZ PCI BUS DUAL UART WITH POWER MANAGEMENT SUPPORT

REV. 1.0.1
XR17V252
66 MHZ PCI BUS DUAL UART WITH POWER MANAGEMENT SUPPORT
TABLE 5: XR17V252 UART AND DEVICE CONFIGURATION REGISTERS
OFFSET ADDRESS
MEMORY SPACE
0x000 - 0x00F
UART channel 0 Regs
READ/WRITE
(Table 13 &
Table 14)
DATA WIDTH
COMMENT
8/16/24/32 First 8 regs are 16550 compatible
0x010 - 0x07F
0x080 - 0x093
0x094 - 0x0FF
0x100
0x100
0x140 - 0x17F
0x180 - 0x1FF
Reserved
DEVICE CONFIGURA-
TION REGISTERS
Reserved
UART 0 – Read FIFO
UART 0 – Write FIFO
Reserved
UART 0 – Read FIFO
with errors
(Table 6)
Read-Only
Write-Only
Read-Only
8/16/24/32
8/16/24/32 64 bytes of RX FIFO data
8/16/24/32 64 bytes of TX FIFO data
16/32 64 bytes of RX FIFO data + LSR
0x200 - 0x20F
UART channel 1 Regs
0x210 - 0x2FF
0x300
0x300
0x340 - 0x37F
0x380 - 0x3FF
Reserved
UART 1 – Read FIFO
UART 1 – Write FIFO
Reserved
UART 1 – Read FIFO
with errors
(Table 13 &
Table 14)
Read-Only
Write-Only
Read-Only
8/16//24/32 First 8 regs are 16550 compatible
d
8/16/24/32 64 bytes of RX FIFO data
8/16/24/32 64 bytes of TX FIFO data
16/32 64 bytes of RX FIFO data + LSR
13