参数资料
型号: MPC8377E-RDBA
厂商: Freescale Semiconductor
文件页数: 69/127页
文件大小: 0K
描述: BOARD REF DES MPC8377 REV 2.1
设计资源: MPC8379E-RDB Ref Design Guide
标准包装: 1
系列: PowerQUICC II™ PRO
类型: MPU
适用于相关产品: MPC8377E
所含物品: 板,CD
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MPC8377E PowerQUICC II Pro Processor Hardware Specifications, Rev. 8
46
Freescale Semiconductor
This figure provides the eSDHC clock input timing diagram.
Figure 26. eSDHC Clock Input Timing Diagram
Input hold times: SD_CMD, SD_DAT
x, SD_CD to
SD_CLK
tSFSIXKH
0—
ns
SD_CLK delay within device
tINT_CLK_DLY
1.5
ns
Output valid: SD_CLK to SD_CMD, SD_DAT
x valid
tSFSKHOV
—4
ns
Output hold: SD_CLK to SD_CMD, SD_DAT
x valid
tSFSKHOX
0—
SD card input setup
tISU
5—
ns
SD card input hold
tIH
5—
ns
SD card output valid
tODLY
—14
ns
SD card output hold
tOH
0—
ns
Notes:
1. The symbols used for timing specifications herein follow the pattern of t(first three letters of functional block)(signal)(state)
(reference)(state) for inputs and t(first three letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tSFSIXKH
symbolizes eSDHC full mode speed device timing (SFS) input (I) to go invalid (X) with respect to the clock reference (K)
going to high (H). Also tSFSKHOV symbolizes eSDHC full speed timing (SFS) for the clock reference (K) to go high (H), with
respect to the output (O) going valid (V) or data output valid time. Note that, in general, the clock reference symbol
representation is based on five letters representing the clock of a particular functional. For rise and fall times, the latter
convention is used with the appropriate letter: R (rise) or F (fall).
2. Measured at capacitive load of 40 pF.
3. For reference only, according to the SD card specifications.
4. Average, for reference only.
Table 42. eSDHC AC Timing Specifications for Full-Speed Mode (continued)
At recommended operating conditions OVDD = 3.3 V ± 165 mV.
Parameter
Symbol1
Min
Max
Unit
Note
eSDHC
tSFSCKR
External Clock
VM
tSFSCK
tSFSCKF
VM = Midpoint Voltage (OVDD/2)
operational mode
tSFSCKL
tSFSCKH
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