SDC420T memory card Description Features Transcend’s 3D flash technology combines the advantages of high performance and exceptional endurance. The industrial memory cards can endure operating temperatures ranging from -25°C to 85°C; setting a new standard in consistent, long-term performance even in the harshest conditions. Transcend’s 3D TLC NAND flash technology Excellent endurance Compatible with SD Specification Ver. 5.
Architecture
Pin Definition SD Mode Pin No.
Specifications Physical Specification Form Factor SD SD specification SD5.1 (32GB and larger capacity),SD3.01 (16GB) Flash 3D TLC NAND flash Dimensions (mm) Length 32.00 ± 0.1 Width 24.00 ± 0.1 Height 2.10 ± 0.
** 25 ℃ , 4GB DRAM, Windows® 7 with Transcend RDF5, benchmark IO Meter 2008 , copied 4GB size ,unit IOPS Endurance TeraBytes Written (T.B.) TS16GSDC420T 13 TS32GSDC420T 80 TS64GSDC420T 160 TS128GSDC420T 320 TS256GSDC420T 640 *TBW is based on Transcend internal standard to calculate how much data can be written into the drive.
Bus Mode/ Power Consumption Value(Max.) Default Mode (25MHz) High Speed mode (50MHz) UHS-I SDR12 mode (25Mhz) UHS-I SDR25 mode (50Mhz) UHS-I SDR50 mode (100Mhz) UHS-I DDR50 mode (50Mhz) UHS-I SDR104 mode (208Mhz) Read 100mA Write 100mA Idle 0.5mA Read 200mA Write 200mA Idle 0.5mA Read 200mA Write 200mA Idle 0.5mA Read 200mA Write 200mA Idle 0.5mA Read 400mA Write 400mA Idle 0.5mA Read 400mA Write 400mA Idle 0.5mA Read 400mA Write 400mA Idle 0.
Product Description 1.Features 1.1 Lock Function Support for password protected locking and unlocking of SD devices. It uses the LOCK/UNLOCK command(CMD42) which is available in SD command sets. 1.2 Built-in ECC Engine In event of errors, the combined data allow the recovery of the original data. The number of errors that can be recovered depends on the algorithm used.
1.3 Wear-leveling This function means the data are no longer tied to a single physical area, which can extend Card’s life expectancy. 1.4 Early move The function provides a mechanism to avoid read disturbance. Built-in ECC is used to detect and correct data bit error. If error bits reaches the default threshold, the data will be moved to another good block to avoid un-correct error in advance. 1.
3.SD card Register information 3.1 OCR register The OCR 32-bit operation conditions register stores the VDD voltage profile of the non UHS-II card and VDD1 voltage profile of the UHS-II card. Additionally, this register includes status information bits. One status bit is set if the card power up procedure has been finished.
1) This bit is valid only when the card power up status bit is set. 2) This bit is set to LOW if the card has not finished the power up routine. 3.2 CID register The Card Identification (CID) register is 128 bits wide. It contains the card identification information used during the card identification phase. Every individual flash card shall have a unique identification number.
• MID An 8-bit binary number that identifies the card manufacturer. The MID number is controlled, defined, and allocated to a SD Memory Card manufacturer by the SD-3C, LLC. This procedure is established to ensure uniqueness of the CID register. • OID A 2-character ASCII string that identifies the card OEM and/or the card contents (when used as a distribution media either on ROM or FLASH cards). The OID number is controlled, defined, and allocated to a SD Memory Card manufacturer by the SD-3C, LLC.
00000001 0100. MDT can be customized by Transcend • CRC CRC7 checksum (7 bits). 3.3 CSD register The following sections describe the CSD fields and the relevant data types for the standard and High Capacity SD Memory Card. CSD Version 1.0 is applied Capacity SD Memory Card and CSD Version is applied to 2.0 is applied to only the High Capacity SD Memory Card. The field name in parenthesis is set to fixed value and indicates that the host is not necessary to refer these fields.
3.3.3 CSD Register (CSD Version 2.
3.4 RCA register The writable 16-bit relative card address register carries the card address that is published by the card during the card identification. This address is used for the addressed host-card communication after the card identification procedure. The default value of the RCA 3.
describes the SCR register content The writable 16-bit relative card address register carries the card address that is published by the card during the card identification. This address is used for the addressed host-card communication after the card identification procedure.
4.0 Power Scheme 4.1.1 Power Up Time of Card A card shall be ready to accept the first command within 1ms from detecting VDD min. The host may use up to 74 clocks for preparation before receiving the first command. Power up time is defined as voltage rising time from 0 volt to VDD min and depends on application parameters such as the maximum number of SD Cards, the bus length and the characteristic of the power supply unit.
send the card to SPI mode. CMD8 is newly added in the Physical Layer Specification Version 2.00 to support multiple voltage ranges and used to check whether the card supports supplied voltage. The version 2.00 or later host shall issue CMD8 and verify voltage before card initialization. The host that does not support CMD8 shall supply high voltage range. ACMD41 is a synchronization command used to negotiate the operation voltage range and to poll the cards until they are out of their power-up sequence.
4.1.3 Power On or Power Cycle Followings are requirements for Power on and Power cycle to assure a reliable SD Card hard reset. (1) Voltage level shall be below 0.5V (2) Duration shall be at least 1ms. 4.1.4 Power Supply Ramp Up The power ramp up time is defined from 0.5V threshold level up to the operating supply voltage which is stable between VDD(min.) and VDD(max.) and host can supply SDCLK.
Order information Capacity Transcend Part Number 16GB TS16GSDC420T 32GB TS32GSDC420T 64GB TS64GSDC420T 128GB TS128GSDC420T 256GB TS256GSDC420T The technical information above is based on industry standard data and has been 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.
Revision History Version Date Note 0.1 2019/08/16 The 1st W edition 1.0 2019/09/17 Update performance 1.1 2020/02/24 Add TS256GSDC420T 1.2 2020/03/17 Add TS16GSDC420T 1.3 2020/04/28 Add U1 in data transfer specification for TS16GSDC420T 1.4 2020/05/08 Add feature / Specification Copyright © 2020 Transcend Information, Inc.
