SMS01GDFB5E NUMONYX, SMS01GDFB5E Datasheet - Page 26

• Manufacturer Part Number: SMS01GDFB5E
• Description: MICROSD CARD SMS 1GB FLASH MEM
• Manufacturer: NUMONYX

Specifications of SMS01GDFB5E

• Memory Size: 1GB
• Memory Type: SD (Secure Digital)
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SD memory card hardware interface
4
4.1
Figure 13. Full size SD memory card circuitry
26/60
SD memory card hardware interface
SD memory card bus circuitry
Figure 13
The SD memory card may also feature two additional contacts, that are not part of the
internal circuitry. When present in the device, these contacts are located at the level of the
write protect/card detect switch in the socket, and should be connected as illustrated in
Figure
When DAT3 is used for card detection, the R
disconnected and another resistor should be connected to ground.
R
against bus floating when no card is inserted or when all card drivers are high impedance.
R
SD memory card
WP
DAT
is used to protect the write protect/card detection switch.
host
and R
13.
shows the internal bus circuitry required for the SD memory card.
CMD
are pull-up resistors used to protect the DAT and CMD lines, respectively,
V
DD
R
DAT
V
DD
R
CMD
C1
V
DD
C2
R
WP
Write protect
CMD
DAT0-DAT3
DAT
C3
resistor connected to DAT3 should be
9
1 2 3 4 5 6 7 8
SD memory
card
V
SS
CLK
SMSxxxDF
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