MPC8378E datasheet(51/127 Pages) FREESCALE

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MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

Enhanced Secure Digital Host Controller (eSDHC)

Figure 30 provides the eSDHC clock input timing diagram.

Figure 30. eSDHC Clock Input Timing Diagram

Input hold times: SD_CMD, SD_DATx, SD_CD to

SD_CLK

tSFSIXKH

0—

SD_CLK delay within device

tINT_CLK_DLY

1.5

—

Output valid: SD_CLK to SD_CMD, SD_DATx valid

tSFSKHOV

—4

Output hold: SD_CLK to SD_CMD, SD_DATx valid

tSFSKHOX

0—

—

SD card input setup

tISU

5—

SD card input hold

tIH

5—

SD card output valid

tODLY

—14

SD card output hold

tOH

0—

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 47. eSDHC AC Timing Specifications for Full-Speed Mode (continued)

At recommended operating conditions OVDD = 3.3 V ± 165 mV.

Parameter

Symbol1

Min

Max

Unit

Notes

eSDHC

tSFSCKR

External Clock

tSFSCK

tSFSCKF

VM = Midpoint Voltage (OVDD/2)

operational mode

tSFSCKL

tSFSCKH

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