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參數(shù)資料
| 型號： | SPC5121YVY400BR |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | RISC PROCESSOR, PBGA516 |
| 封裝： | 27 X 27 MM, 2.25 MM HEIGHT, 1 MM PITCH, ROHS COMPLIANT, PLASTIC, TFBGA-516 |
| 文件頁數(shù)： | 75/86頁 |
| 文件大?。?/td> | 719K |
| 代理商： | SPC5121YVY400BR |
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System Design Information
MPC5121E/MPC5123 Data Sheet, Rev. 3
Freescale Semiconductor
77
Figure 59. Recommended connection for pins of unused USB PHY
4.4
Pull-Up/Pull-Down Resistor Requirements
The MPC5121e/MPC5123 requires external pull-up or pull-down resistors on certain pins.
4.4.1
Pull-Down Resistor Requirements for TEST pin
The MPC5121e/MPC5123 requires a pull-down resistor on the test pin TEST.
4.4.2
Pull-Up Requirements for the PCI Control Lines
PCI control signals always require pull-up resistors on the motherboard (not the expansion board) to ensure that they contain
stable values when no agent is actively driving the bus. This includes PCI_FRAME, PCI_TRDY, PCI_IRDY, PCI_DEVSEL,
PCI_STOP, PCI_SERR, PCI_PERR, and PCI_REQ.
Refer to the PCI Local Bus specification.
4.5
JTAG
The MPC5121e/MPC5123 provides you with an IEEE 1149.1 JTAG interface to facilitate board/system testing. It also provides
a Common On-Chip Processor (COP) Interface, which shares the IEEE 1149.1 JTAG port.
The COP Interface provides access to the MPC5121e/MPC5123's embedded e300 processor and to other on-chip resources.
This interface provides a means for executing test routines and for performing software development and debug functions.
4.5.1
TRST
Boundary scan testing is enabled through the JTAG interface signals. The TRST signal is optional in the IEEE 1149.1
specification but is provided on all processors that implement the PowerPC architecture. To obtain a reliable power-on reset
performance, the TRST signal must be asserted during power-on reset.
USB_XTALO
USB_XTALI
VSS
NC
USB_TPA
NC
USB_DN
USB_DP
Weak pull-up or pull-down
USB_UID
USB_VBUS
VSS
USB_PLL_PWR3
USB_PLL_GND
VSS
USB_VSSA_BIAS
USB_RREF
VSS
USB_VDDA_BIAS
VSS
VDD_IO
USB_VSSA
VSS
USB_VDDA
VDD_IO
MPC5121e/MPC5123
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SPC5123YVY300B | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Advance Information |
| SPC5123YVY300BR | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Advance Information |
| SPC5123YVY400B | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:e300 Power Architecture processor core |
| SPC5123YVY400BR | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:e300 Power Architecture processor core |
| SPC5125 | 制造商:ELECTROMAGNETIC CORPORATI 功能描述:_ |
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