SMS02GDFB5E NUMONYX, SMS02GDFB5E Datasheet - Page 37

• Manufacturer Part Number: SMS02GDFB5E
• Description: MICROSD CARD SMS 2GB FLASH MEM
• Manufacturer: NUMONYX

Specifications of SMS02GDFB5E

• Memory Size: 2GB
• Memory Type: SD (Secure Digital)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SMSxxxDF
6
6.1
6.1.1
Timings
The symbols listed in
The difference between P-bits and Z-bits is that P-bits are actively driven to High by the card
or the host output driver whereas Z-bits are driven to High and kept High by the pull-up
resistors R
All timing values are defined in
Table 26.
Command and response
The host command and the card response are both clocked out on the rising edge of the
host clock.
Card identification and operating conditions timings
The timings for CMD2 (ALL_SEND_CID) and ACMD41 are shown in
command is followed by two Z-bits (to leave time for the bus to switch direction) and then by
P-bits pushed up by the responding card. The card response to the host command starts
after N
Symbol
CRC
ID
D
S
T
P
E
Z
X
*
clock cycles.
CMD
Timing diagram symbols
and R
Start bit (= ‘0’)
Transmitter bit (host = '1', card = '0')
One-cycle pull-up (= '1')
End bit (=1)
High impedance state (-> = '1')
Data bits
Don't care data bits (from card)
Repetition
Cyclic redundancy check bits (7 bits)
Card active
Host active
DAT
Table 26
. P-bits, which are actively driven High, are less sensitive to noise.
are used in all timing diagrams.
Table
27.
Description
Figure
18. The
Timings
37/60