AC Requirements for SGMII
參數資料
型號： MPC8313EZQADD
廠商： Freescale Semiconductor
文件頁數： 22/99頁
文件大?。?/td> 0K
描述： IC MPU POWERQUICC II PRO 516PBGA
標準包裝： 40
系列： MPC83xx
處理器類型： 32-位 MPC83xx PowerQUICC II Pro
速度： 267MHz
電壓： 0.95 V ~ 1.05 V
安裝類型： 表面貼裝
封裝/外殼： 516-BBGA 裸露焊盤
供應商設備封裝： 516-PBGAPGE（27x27）
包裝： 托盤
配用： MPC8313E-RDB-ND - BOARD PROCESSOR
MPC8313E PowerQUICC II Pro Processor Hardware Specifications, Rev. 4
Freescale Semiconductor
29
8.3.2
AC Requirements for SGMII SD_REF_CLK and SD_REF_CLK
This table lists the SGMII SerDes reference clock AC requirements. Note that SD_REF_CLK and
SD_REF_CLK are not intended to be used with, and should not be clocked by, a spread spectrum clock
source.
8.3.3
SGMII Transmitter and Receiver DC Electrical Characteristics
Table 32 and Table 33 describe the SGMII SerDes transmitter and receiver AC-coupled DC electrical
characteristics. Transmitter DC characteristics are measured at the transmitter outputs (SD_TX[n] and
SD_TX[n]) as depicted in Figure 16.
Table 31. SD_REF_CLK and SD_REF_CLK AC Requirements
Symbol
Parameter Description
Min
Typ
Max
Unit
tREF
REFCLK cycle time
—
8
—
ns
tREFCJ
REFCLK cycle-to-cycle jitter. Difference in the period of any two
adjacent REFCLK cycles
——
100
ps
tREFPJ
Phase jitter. Deviation in edge location with respect to mean
edge location
–50
—
50
ps
Table 32. SGMII DC Transmitter Electrical Characteristics
Parameter
Symbol
Min
Typ
Max
Unit
Note
Supply voltage
XCOREVDD
0.95
1.0
1.05
V
Output high voltage
VOH
—
XCOREVDD-Typ/2
+|VOD|-max/2
mV
1
Output low voltage
VOL
XCOREVDD-Typ/2
– |VOD|-max/2
——
mV
1
Output ringing
VRING
——
10
%
Output differential voltage2, 3
|VOD|
323
500
725
mV
Equalization
setting: 1.0x
Output offset voltage
VOS
425
500
575
mV
1, 4
Output impedance
(single-ended)
RO
40
—
60
Mismatch in a pair
R
O
——
10
%
Change in VOD between 0 and 1
|V
OD|—
—
25
mV
Change in VOS between 0 and 1
V
OS
——
25
mV
Output current on short to GND
ISA, ISB
——
40
mA
Notes:
1. This will not align to DC-coupled SGMII. XCOREVDD-Typ = 1.0 V.
2. |VOD| = |VTXn – VTXn|. |VOD| is also referred as output differential peak voltage. VTX-DIFFp-p = 2*|VOD|.
3. The |VOD| value shown in the Typ column is based on the condition of XCOREVDD-Typ = 1.0 V, no common mode offset
variation (VOS = 500 mV), SerDes transmitter is terminated with 100- differential load between TX[n] and TX[n].
4. VOS is also referred to as output common mode voltage.
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