NOTE: EWR=" />
參數(shù)資料
型號(hào): XR17V252IM-F
廠商: Exar Corporation
文件頁(yè)數(shù): 69/69頁(yè)
文件大?。?/td> 0K
描述: IC UART PCI BUS DUAL 100TQFP
標(biāo)準(zhǔn)包裝: 90
特點(diǎn): *
通道數(shù): 2,DUART
FIFO's: 64 字節(jié)
規(guī)程: RS485
電源電壓: 3.3V,5V
帶自動(dòng)流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動(dòng)位檢測(cè)功能:
帶調(diào)制解調(diào)器控制功能:
安裝類型: 表面貼裝
封裝/外殼: 100-TQFP
供應(yīng)商設(shè)備封裝: 100-TQFP(14x14)
包裝: 托盤
XR17V252
9
REV. 1.0.2
66 MHZ PCI BUS DUAL UART WITH POWER MANAGEMENT SUPPORT
NOTE: EWR=Read/Write from external EEPROM. RWR=Read/Write from AD[31:0]. RO= Read Only. RWC=Read/Write-
Clear.
1.2
Power Management Registers
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 Table 2 below. The V252
complies with Revision 1.1 of the PCI Power Management Interface Specification.
0x24
31:0
RO
Unimplemented Base Address Register (returns zeros)
0x00000000
0x28
31:0
RO
Reserved
0x00000000
0x2C
31:16
EWR
Subsystem ID (write from external EEPROM by customer)
0x0000
15:0
EWR
Subsystem Vendor ID (write from external EEPROM by cus-
tomer)
0x0000
0x30
31:0
RO
Expansion ROM Base Address (Unimplemented)
0x00000000
0x34
31:8
RO
Reserved (returns zeros)
0x000000
7:0
RO
Capability Pointer (Implemented for Power Management)
0x40
0x38
31:0
RO
Reserved (returns zeros)
0x00000000
0x3C
31:24
RO
Unimplemented MAXLAT
0x00
23:16
RO
Unimplemented MINGNT
0x00
15:8
RO
Interrupt Pin, use INTA#.
0x01
7:0
RWR
Interrupt Line.
0xXX
TABLE 2: POWER MANAGEMENT REGISTERS
ADDRESS
OFFSET
BITS
TYPE
DESCRIPTION
RESET VALUE
(HEX OR BINARY)
0x40
31:16
See Below
Power Management Capabilities (PMC)
See Below
31:27
RO
PME Support (PME# can be asserted from D3hot only)
01000b
26:20
RO
Reserved or Not Supported
0000000b
19
RO
PME Clock (PCI clock is required for PME# generation)
1b
18:16
RO
Version
010b
15:8
RO
Next Item Pointer
0x00
7:0
RO
Capability ID
0x01
0x44
31:24
RO
Unimplemented Data Register
0x00
23:16
RO
Unimplemented Bridge Support Extensions
0x00
15:0
See Below
Power Management Control/Status Register (PMCSR)
See Below
15
RWC
PME_Status
0b
TABLE 1: PCI LOCAL BUS CONFIGURATION SPACE REGISTERS
ADDRESS
OFFSET
BITS
TYPE
DESCRIPTION
RESET VALUE
(HEX OR BINARY)
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