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Parameter
Input set-up time
Input hold time
Output delay time during Data Transfer Mode
Output delay time during Identification Mode
NOTE:
OHz stops the clock. The given minimum frequency range is for cases where a continuous clock is required.
3.5. SD Card Registers
There is a set of seven registers within the card interface. The OCR, CID, CSD and SCR registers carry the card
configuration information. The RCA register holds the card relative communication address for the current session.
The card status and SD status registers hold the communication protocol related status of the card.
3.5.1. Operating Conditions Register (OCR)
The 32-bit operation conditions register stores the V
executing the voltage recognition procedure (CMD1) with any standard SD Card host using operating voltages form
2 to 3.6 Volts.
Accessing the data in the memory array, however, requires 2.7 to 3.6 Volts. The OCR shows the voltage range in
which the card data can be accessed. The structure of the OCR register is described in Table 3-8.
SanDisk Secure Digital (SD) Card Product Manual, Rev. 1.9 © 2003 SANDISK CORPORATION
Symbol
Inputs CMD, DAT (referenced to CLK)
t
ISU
t
IH
Outputs CMD, DAT (referenced to CLK)
t
ODLY
t
ODLY
voltage profile of the card. The SD Card is capable of
DD
Table 3-8. OCR Register Definition
OCR Bit
VDD Voltage Window
0-3
4
5
6
7
8
9
10
11
12
13
14
15
16
SD Card Interface Description
Min.
Max.
Unit
5
ns
5
ns
0
14
ns
0
50
ns
Reserved
1.6-1.7
1.7-1.8
1.8-1.9
1.9-2.0
2.0-2.1
2.1-2.2
2.2-2.3
2.3-2.4
2.4-2.5
2.5-2.6
2.6-2.7
2.7-2.8
2.8-2.9
Remark
C
≤ 25 pF
L
(1 cards)
C
≤ 25 pF
L
(1 cards)
C
≤ 25 pF
L
(1 cards)
C
≤ 25 pF
L
(1 cards)
3-11
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