mpc8306 Freescale Semiconductor, Inc, mpc8306 Datasheet - Page 36

• Manufacturer Part Number: mpc8306
• Description: Powerquicc Ii Pro Integrated Communications Processor Family Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

eSDHC
The following figure provides the eSDHC clock input timing diagram.
The following figure provides the data and command input/output timing diagram.
36
At recommended operating conditions with OV
Input hold times: SD_CMD, SD_DATx, SD_CD to
SD_CLK
Output delay time: SD_CLK to SD_CMD, SD_DATx valid
Notes:
1. The symbols used for timing specifications herein follow the pattern of t
2. In full-speed mode, the clock frequency value can be 0–25 MHz for an SD/SDIO card and 0–20 MHz for an MMC card. In
3. To satisfy hold timing, the delay difference between clock input and cmd/data input must not exceed 2 ns.
4. C
(reference)(state)
symbolizes eSDHC high-speed mode device timing (SHS) clock reference (K) going to the high (H) state, with respect to the
output (O) reaching the invalid state (X) or output hold time. Note that in general, the clock reference symbol 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).
high-speed mode, the clock frequency value can be 0–33.25 MHz for an SD/SDIO card and 0–52 MHz for an MMC card.
CARD
MPC8306 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 2
Figure 28. eSDHC Data and Command Input/Output Timing Diagram Referenced to Clock
 10 pF, (1 card), and C
External Clock
operational mode
SD_DAT/CMD
SD_DAT/CMD
External Clock
for inputs and t
SD_CK
Outputs
eSDHC
Parameter
Inputs
Table 37. eSDHC AC Timing Specifications (continued)
VM
(first three letters of functional block)(reference)(state)(signal)(state)
L
= C
Figure 27. eSDHC Clock Input Timing Diagram
BUS
VM
DD
+ C
= 3.3 V
HOST
VM = Midpoint Voltage (OV
VM = Midpoint Voltage (OV
t
SHSCK
+ C
t
VM
SHSKHOV
t
CARD
VM
SHSIVKH
40 pF
t
Symbol
t
SHSKHOV
SHSIXKH
VM
VM
1
(first three letters of functional block)(signal)(state)
DD
DD
/2)
/2)
t
SHSIXKH
Min
t
2.5
–3
SHSCKL
t
SHSCKR
for outputs. For example, t
VM
t
Max
SHSCKH
—
3
t
SHSCKF
Freescale Semiconductor
Unit
ns
ns
FHSKHOV
Notes
3, 4
4