参数资料
型号: MPC8544VTALFB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 667 MHz, RISC PROCESSOR, PBGA783
封装: 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-783
文件页数: 39/120页
文件大小: 1321K
代理商: MPC8544VTALFB
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 2
Freescale Semiconductor
25
Enhanced Three-Speed Ethernet (eTSEC), MII Management
8.3
SGMII Interface Electrical Characteristics
Each SGMII port features a 4-wire AC-coupled serial link from the dedicated SerDes 2 interface of
MPC8544E as shown in Figure 7, where CTX is the external (on board) AC-coupled capacitor. Each output
pin of the SerDes transmitter differential pair features 50-
Ω output impedance. Each input of the SerDes
receiver differential pair features 50-
Ω on-die termination to SGND_SRDS2 (xcorevss). The reference
circuit of the SerDes transmitter and receiver is shown in Figure 7.
When an eTSEC port is configured to operate in SGMII mode, the parallel interface’s output signals of
this eTSEC port can be left floating. The input signals should be terminated based on the guidelines
described in Section 21.5, “Connection Recommendations,” as long as such termination does not violate
the desired POR configuration requirement on these pins, if applicable.
When operating in SGMII mode, the eTSEC EC_GTX_CLK125 clock is not required for this port. Instead,
SerDes reference clock is required on SD2_REF_CLK and SD2_REF_CLK pins.
8.3.1
AC Requirements for SGMII SD2_REF_CLK and SD2_REF_CLK
Table 23 lists the SGMII SerDes reference clock AC requirements. Please note that SD2_REF_CLK and
SD2_REF_CLK are not intended to be used with, and should not be clocked by, a spread spectrum clock
source.
Input low current (VIN = GND)
IIL
–600
μA3
Notes:
1. LVDD supports eTSEC1.
2. TVDD supports eTSEC3.
3. The symbol VIN, in this case, represents the LVIN and TVIN symbols referenced in Table 1 and Table 2.
Table 22. GMII, MII, RMII, RGMII, RTBI, TBI, and FIFO DC Electrical Characteristics
Parameters
Symbol
Min
Max
Unit
Notes
Supply voltage 2.5 V
LVDD/TVDD
2.375
2.625
V
1, 2
Output high voltage (LVDD/TVDD = Min, IOH = –1.0 mA)
VOH
2.0
V
Output low voltage (LVDD/TVDD = Min, IOL = 1.0 mA)
VOL
—0.4
V
Input high voltage
VIH
1.70
V
Input low voltage
VIL
—0.7
V
Input current (VIN = 0, VIN = LVDD, VIN = TVDD)IIN
—±15
μA
1, 2, 3
Notes:
1. LVDD supports eTSEC1.
2. TVDD supports eTSEC3.
3. The symbol VIN, in this case, represents the LVIN and TVIN symbols referenced in Table 1 and Table 2.
Table 21. GMII, MII, TBI, RMII and FIFO DC Electrical Characteristics (continued)
Parameter
Symbol
Min
Max
Unit
Notes
相关PDF资料
PDF描述
MPC8544VTAQJB 32-BIT, 1000 MHz, RISC PROCESSOR, PBGA783
MPC8544VTALJB 32-BIT, 667 MHz, RISC PROCESSOR, PBGA783
MPC8544CVTARFB 32-BIT, 1067 MHz, RISC PROCESSOR, PBGA783
MPC8544CVTALGB 32-BIT, 667 MHz, RISC PROCESSOR, PBGA783
MPC8544VTANGB 32-BIT, 800 MHz, RISC PROCESSOR, PBGA783
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