xr17v258 Exar Corporation, xr17v258 Datasheet - Page 11

• Manufacturer Part Number: xr17v258
• Description: 66mhz Pci Bus Octal Uart With Power Management Support
• Manufacturer: Exar Corporation

xr
REV. 1.0.0
N
The Power Management Registers are implemented in 2 DWORDs starting at address offset 0x40 of the PCI
local bus configuration space. The bit definitions of these registers are shown in
complies with Revision 1.1 of the PCI Power Management Interface Specification.
1.2
OTE
A
A
O
O
DDRESS
0x2C
0x3C
DDRESS
0x24
0x28
0x30
0x34
0x38
0x40
0x44
FFSET
FFSET
: EWR=Read/Write from external EEPROM. RWR=Read/Write from AD[31:0]. RO= Read Only. RWC=Read/Write-
Clear.
Power Management Registers
31:0
31:0
31:16
15:0
31:0
31:8
7:0
31:0
31:24
23:16
15:8
7:0
31:16
31:27
26:20
18:16
31:24
23:16
B
B
15:8
15:0
14:9
7:0
19
15
ITS
ITS
See Below
See Below
EWR
EWR
RWR
RWC
T
T
RO
RO
RO
RO
RO
RO
RO
RO
RO
T
RO
RO
RO
RO
RO
RO
RO
RO
RO
YPE
YPE
ABLE
1: PCI L
66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT
Unimplemented Base Address Register (returns zeros)
Reserved
Subsystem ID (write from external EEPROM by customer)
Subsystem Vendor ID (write from external EEPROM by cus-
tomer)
Expansion ROM Base Address (Unimplemented)
Reserved (returns zeros)
Capability Pointer (Implemented for Power Management)
Reserved (returns zeros)
Unimplemented MAXLAT
Unimplemented MINGNT
Interrupt Pin, use INTA#.
Interrupt Line.
T
ABLE
PME Clock (PCI clock is required for PME# generation)
PME Support (PME# can be asserted from D3
Power Management Control/Status Register (PMCSR)
OCAL
2: P
Unimplemented Bridge Support Extensions
Power Management Capabilities (PMC)
OWER
B
US
Unimplemented Data Register
Reserved or Not Supported
C
M
ONFIGURATION
ANAGEMENT
11
Next Item Pointer
D
Capability ID
D
PME_Status
ESCRIPTION
ESCRIPTION
Reserved
Version
R
EGISTERS
S
PACE
R
EGISTERS
hot
only)
Table 2
below. The V258
(
(
HEX OR BINARY
HEX OR BINARY
R
R
0x00000000
0x00000000
0x00000000
0x00000000
See Below
See Below
ESET
0x000000
ESET
0000000b
0x0000
0x0000
01000b
00000b
XR17V258
0xXX
0x40
0x00
0x00
0x01
010b
0x00
0x01
0x00
0x00
1b
0b
V
V
ALUE
ALUE
)
)