MPC8308 datasheet(52/90 Pages) FREESCALE

52 / 90 page

MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 2

Freescale Semiconductor

Enhanced Secure Digital Host Controller (eSDHC)

Figure 37 provides the eSDHC clock input timing diagram.

Figure 37. eSDHC Clock Input Timing Diagram

SD Card Output Valid

tODLY

—14

SD Card Output Hold

tOH

2.5

—

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.

Table 40. eSDHC AC Timing Specifications for High Speed Mode (continued)

At recommended operating conditions NVDD = 3.3 V ± 300 mV.

Parameter

Symbol 1

Min

Max

Unit

Notes

eSDHC

tSHSCKR

External Clock

tSHSCK

tSHSCKF

VM = Midpoint Voltage (NVDD/2)

operational mode

tSHSCKL

tSHSCKH

MPC8308 Datasheet(PDF) 52 Page - Freescale Semiconductor, Inc