XR17D158_05 Datasheet, PDF (12/73 Pages) Exar Corporation – UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART

XR17D158
UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART
xr
REV. 1.2.2
ADDRESS BITS
0x00
0x04
31:16
15:0
31
30
29:28
27
26:25
24
23
22:16
15:9,7,
5,4,3,2
8
6
1
0
0x08
0x0C
0x10
0x14
0x18h
0x1C
0x20
0x24
0x28
31:8
7:0
31:24
23:16
15:8
7:0
31:12
11:0
31:0
31:0
31:0
31:0
31:0
31:0
TABLE 2: PCI LOCAL BUS CONFIGURATION SPACE REGISTERS
TYPE
DESCRIPTION
RWR^{1 Device ID (Exar device ID number)}
RWR^{1 Vendor ID (Exar) specified by PCISIG}
RWC
RWC
RO
Parity error detected. Cleared by writing a logic 1.
System error detected. Cleared by writing a logic 1.
Unused
R-Reset Target Abort. Set whenever D158 terminates with a target abort.
RO DEVSEL# timing.
RO Unemployments bus master error reporting bit
RO Fast back to back transactions are supported
RO Reserved Status bits
RO Command bits (reserved)
RESET VALUE
(HEX)
0x0158
0x13A8
0000
0
00
0
1
000 0000
0x0000
RWR
RWR
RWR
RO
RO
RO
RO
RO
RO
RO
RWR
RO
RO
RO
RO
RO
RO
RO
SERR# driver enable. Logic 1=enable driver and 0=disable
0
driver
Parity error enable. Logic 1=respond to parity error and 0=ignore
0
Command controls a device’s response to mem space accesses:
0
0=disable mem space accesses, 1=enable mem space accesses
Device’s response to I/O space accesses is disabled.
0
(0 = disable I/O space accesses)
Class Code (Simple 550 Communication Controller).
0x070002
Revision ID (Exar device revision number)
Current Rev. value
BIST (Built-in Self Test)
0x00
Header Type (a single function device with one BAR)
0x00
Unimplemented Latency Timer (needed only for bus master)
0x00
Unimplemented Cache Line Size
0x00
Memory Base Address Register (BAR)
0x00
Claims a 4K address space for the memory mapped UARTs
0x000
Unimplemented Base Address Register (returns zeros)
0x00000000
Unimplemented Base Address Register (returns zeros)
0x00000000
Unimplemented Base Address Register (returns zeros)
0x00000000
Unimplemented Base Address Register (returns zeros)
0x00000000
Unimplemented Base Address Register (returns zeros)
0x00000000
Reserved
0x00000000
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