參數(shù)資料
型號： TMS320DM647_08
廠商： Texas Instruments, Inc.
英文描述： Digital Media Processor
中文描述： 數(shù)字媒體處理器
文件頁數(shù)： 151/167頁
文件大?。?/td> 1438K
代理商： TMS320DM647_08
www.ti.com
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6.19 Management Data Input/Output (MDIO)
6.19.1 MII Management Interface
6.19.2 MDIO Register Descriptions
TMS320DM647/TMS320DM648
Digital Media Processor
SPRS372A–MAY 2007–REVISED JUNE 2007
REFCLKP/N Jitter and PLL Loop Bandwidth
Jitter on the reference clock will degrade both the transmit eye and receiver jitter tolerance thereby
impairing system performance. A good quality, low jitter reference clock is necessary to achieve
compliance with most if not all physical layer standards (see
Table 6-69
).
Table 6-69. REFCLKP/N Jitter Requirements for Standards Compliance
Line Rate (Gbps)
Total REFCLKP/N Jitter (within PLL bandwidth)
1.25
Standard
Gigabit Ethernet
50 ps pk-pk
The management data input/output (MDIO) module continuously polls all 32 MDIO addresses to
enumerate all PHY devices in the system. It contains two user access registers to control and monitor up
to two PHYs simultaneously.
The MDIO module implements the 802.3 serial management interface to interrogate and control two
Ethernet PHYs simultaneously using a shared two-wire bus. Figure 6-xx shows a device with two MACs,
each connected to a PHY, being managed by the MII interface module using a shared bus.
Host software uses the MDIO module to configure the auto-negotiation parameters of each PHY attached
to the Ethernet Switch Subsystem, retrieve the negotiation results, and configure required parameters in
the Ethernet Switch Subsystem module for correct operation. The module is designed to allow almost
transparent operation of the MDIO interface, with very little maintenance from the core processor. Only a
maximum of two PHYs may be connected at any given time.
For more detailed information on the Ethernet Switch Subsystem, see the
TMS320DM647/DM648 DSP
Ethernet Subsystem User's Guide Reference Guide
(literature number
SPRUF57
). For a list of supported
registers and register fields, see
Table 6-70
.
Table 6-70. MDIO Registers
REGISTER ACRONYM
MDIOVer
MDIOControl
MDIOAlive
MDIOLink
MDIOLinkIntRaw
HEX ADDRESS RANGE
0x02D0 4000
0x02D0 4004
0x02D0 4008
0x02D0 400C
0x02D0 4010
DESCRIPTION
Module version register
Module control register
PHY acknowledge status register
PHY link status register
Link status change interrupt register (raw
value)
Link status change interrupt register (masked
value)
0x02D0 4014
MDIOLinkIntMasked
0x02D0 4018 - 0x02D0 401C
0x02D0 4020
Reserved
MDIOUserIntRaw
User command complete interrupt register
(raw value)
User command complete interrupt register
(masked value)
User interrupt mask set register
User interrupt mask clear register
0x02D0 4024
MDIOUserIntMasked
0x02D0 4028
0x02D0 402C
0x02D0 4030 - 0x02D0 407C
0x02D0 4080
0x02D0 4084
0x02D0 4088
0x02D0 408C
MDIOUserIntMaskSet
MDIOUserIntMaskClr
Reserved
MDIOUserAccess0
MDIOUserPhySel0
MDIOUserAccess1
MDIOUserPhySel1
User access register0
User PHY select register0
User access register1
User PHY select register1
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Peripheral Information and Electrical Specifications
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TMS320DM647CUT9 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC Dig Media Proc RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
TMS320DM647CUTA8 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC Dig Media Proc RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
TMS320DM647CUTD7 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC Dig Media Proc RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
TMS320DM647ZUT1 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC Dig Media Proc RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
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