參數資料
型號: MC8641HX1250HC
廠商: Freescale Semiconductor
文件頁數: 107/130頁
文件大小: 0K
描述: IC MPU SGL E600 CORE 994FCCBGA
標準包裝: 1
系列: MPC86xx
處理器類型: 32-位 MPC86xx PowerPC
速度: 1.25GHz
電壓: 1.05V
安裝類型: 表面貼裝
封裝/外殼: 994-BCBGA,FCCBGA
供應商設備封裝: 994-FCCBGA(33x33)
包裝: 托盤
MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 2
78
Freescale Semiconductor
Serial RapidIO
15.2
AC Requirements for Serial RapidIO SD
n_REF_CLK and
SD
n_REF_CLK
Table 51 lists AC requirements.
15.3
Signal Definitions
LP-Serial links use differential signaling. This section defines terms used in the description and
specification of differential signals. Figure 53 shows how the signals are defined. The figures show
waveforms for either a transmitter output (TD and TD) or a receiver input (RD and RD). Each signal
swings between A Volts and B Volts where A > B. Using these waveforms, the definitions are as follows:
1. The transmitter output signals and the receiver input signals TD, TD, RD and RD each have a
peak-to-peak swing of A – B Volts
2. The differential output signal of the transmitter, VOD, is defined as VTD–VTD
3. The differential input signal of the receiver, VID, is defined as VRD–VRD
4. The differential output signal of the transmitter and the differential input signal of the receiver
each range from A – B to –(A – B) Volts
5. The peak value of the differential transmitter output signal and the differential receiver input
signal is A – B Volts
6. The peak-to-peak value of the differential transmitter output signal and the differential receiver
input signal is 2 * (A – B) Volts
Figure 53. Differential Peak-Peak Voltage of Transmitter or Receiver
Table 51. SD
n_REF_CLK and SDn_REF_CLK AC Requirements
Symbol
Parameter Description
Min
Typical
Max
Units
Comments
tREF
REFCLK cycle time
10(8)
ns
8 ns applies only to serial RapidIO
with 125-MHz reference clock
tREFCJ
REFCLK cycle-to-cycle jitter. Difference in the
period of any two adjacent REFCLK cycles
80
ps
tREFPJ
Phase jitter. Deviation in edge location with
respect to mean edge location
–40
40
ps
Differential Peak-Peak = 2 * (A-B)
A Volts
TD or RD
B Volts
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