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64MB/128MB/256MB/512MB Secure Digital Card Description
ESSDC64 / ESSDC128 / ESSDC256 / ESSDC512 are different memory capacities from 64MB to 512MB of the Secure Digital Card. They are non-volatile, which means no external power required to retain the information stored on these. Besides, They are also the solid-state device that without moving parts to skip or break down. ESMSDC64 / ESMSDC128 / ESMSDC256 / ESMSDC512 can offer an incredible combination of fast data transfer, great flexibility, excellent security and incredibly small size.
Features
Operating Voltage: 2.7V ~ 3.6V Operating Temperature: -25 ~ 85 Data Transfer Rate: Average 2MB/s Durability: 10,000 insertion/removal cycles Mechanical Write Protection Switch SD Host allows MultiMediaCard upward compatibility Form Factor: 24mm x 32mm x 2.1mm
Pin Definition
Pin No. 1 2 3 4 5 6 7 8 9 Name CD/DA CMD VSS1 VDD CLK VSS2 DAT0 DAT1 DAT2 Type I/O/PP PP S S I S I/O/PP I/O/PP I/O/PP Description Card Detect/Data Line[Bit3] Command/Response Supply voltage ground Supply voltage Clock Supply voltage ground Data Line [Bit0] Data Line [Bit1] Data Line [Bit2]
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64MB/128MB/256MB/512MB Secure Digital Card Architecture
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64MB/128MB/256MB/512MB Secure Digital Card
Bus Operating Conditions 1. General
Parameter Peak voltage on all lines All Inputs Input Leakage Current All Outputs Output Leakage Current -10 10 A -10 10 A Symbol Min. -0.3 Max. VDD+0.3 Unit V Remark
2. Power Supply Voltage
Parameter Supply voltage Symbol VDD Min 2.0 Max 3.6 Unit V Remark CMD0, 12, 55, ACMD41 commands Supply voltage specified in OCR register Except CMD0, 15, 55, ACMD41 commands Supply voltage differentials (VSS1, VSS2) Power up time -0.3 0.3 250 V ms From 0V to VDD Min.
Note: The current consumption of any card during the power-up procedure must not exceed 10mA.
The total capacitance CL of each line of the MultiMediaCard bus is the sum of the bus master capacitance CHOST, the bus capacitance CBUS itself and the capacitance CCARD of each card connected to this line: CL = CHOST + CBUS + N* CCARD Where N is the number of connected cards. Requiring the sum of the host and bus capacitance's not to exceed 30pF for up to 10 cards, and 40pF up to 30 cards, the following values must not be exceeded: Parameter Bus signal line capacitance Signal card capacitance Maximum signal line inductance Pull-up resistance inside card (pin1) RDAT3 10 Symbol CL CCARD Min Max 100 10 16 90 Unit pF pF nH K fpp20MHz May be used for card detection Note that the total capacitance of CMD and DAT lines will be consist of CHOST, CBUS and one CCARD only since they are connected separately to the SD Memory Card host. Parameter Pull-up resistance Bus signal line capacitance
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3. Bus Signal Line Load
Remark fpp20MHz, 7 cards
Symbol RCMD, RDAT CL
Min 10
Max 100 250
Unit K pF
Remark To prevent bus floating fpp5MHz, 21 cards
64MB/128MB/256MB/512MB Secure Digital Card 4. Bus Signal Levels
As the bus can be supplied with a variable supply voltage, all signal levels are related to the supply voltage.
To meet the requirements of the JEDEC specification JESD8-1A, the card input and output voltages shall be within the following specified ranges for any VDD of the allowed voltage range:
Parameter Output HIGH voltage Output LOW voltage Input HIGH voltage Input LOW voltage Symbol VOH VOL VIH VIL 0.625* VDD Min 0.75* VDD 0.125* VDD VDD+0.3 0.25* VDD Max Unit V V V V Remark IOH=-100A @VDD min IOL=-100A @VDD min
VSS-0.3
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64MB/128MB/256MB/512MB Secure Digital Card 5. Bus Timing
Parameter
Symbol
Min
Max
Unit
Remark
Clock CLK (All values are referred to min (VIH) and max (VIL) Clock frequency Data Transfer Mode Clock frequency Identification Mode (The low freq. is required for MultiMediaCard compatibility.) Clock low time tWL 10 50 Clock high time tWH 10 50 Clock rise time tTLH 10 50 Clock fall time tTHL 10 50 Inputs CMD, DAT (referenced to CLK) Input set-up time Input hold time Outputs CMD, DAT (referenced to CLK) Output Delay time
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fpp fOD
0 0
20 400
MHz KHz
CL<100pF,(7 cards) CL<250pF,(21 cards)
ns ns ns ns ns ns ns ns
CL100pF, (7 cards) CL250pF, (21 cards) CL100pF, (7 cards) CL250pF, (21 cards) CL100pF, (7 cards) CL250pF, (21 cards) CL100pF, (7 cards) CL250pF, (21 cards)
fISU fIH
5 5
ns ns
CL<25pF,(1 cards) CL<25pF,(1 cards)
fODLY
0
14
ns
CL<25pF,(1 cards)
64MB/128MB/256MB/512MB Secure Digital Card 6. Reliability and Durability
Temperature Operation: -25 / 85 (Target spec) Storage: -40 (168h) / 85 (500h) Junction temperature: max. 95 Operation: 25 / 95% rel. humidity Storage: 40 / 93% rel. hum./ 500h Salt Water Spray: 3% NaCI/35C; 24h acc. MIL STD Method 1009 10,000 mating cycles; test procedure: tbd. t.b.d t.b.d 1.5m free fall UV: 200nm, 15Ws/cm2 according to ISO7816-1 No warp page; no mold skin; complete form; no cavities surface smoothness <= -0.1mm/cm2 within contour; no cracks; no pollution (fat, oil dust, etc.) 40gf (Ensures that the WP switch will not slide while it is inserted to the connector.) t.b.d
Moisture and corrosion
Durability Bending Torque Drop test UV light exposure Visual inspection Shape and form Minimum moving force of WP witch WP Switch cycles
Above technical information is based on industry standard data and tested to be reliable. However, Transcend makes no warranty, either expressed or implied, as to its accuracy and assumes no liability in connection with the use of this product. Transcend reserves the tight to make changes in specifications at any time without prior notice.
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