PRELIMINARY DATA SHEET 256M bits DDR SDRAM EDD2508AMTA (32M words × 8 bits) EDD2516AMTA (16M words × 16 bits) Pin Configurations The EDD2508AM is a 256M bits Double Data Rate (DDR) SDRAM organized as 8,388,608 words × 8 bits × 4 banks. The EDD2516AM is a 256M bits DDR SDRAM organized as 4,194,304 words × 16 bits × 4 banks. Read and write operations are performed at the cross points of the CK and the /CK. This high-speed data transfer is realized by the 2 bits prefetch-pipelined architecture. Data strobe (DQS) both for read and write are available for high speed and reliable data bus design. By setting extended mode resister, the on-chip Delay Locked Loop (DLL) can be set enable or disable. They are packaged in standard 66-pin plastic TSOP (II). /xxx indicates active low signal. Features L EO Description 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 od Pr • 2.5 V power supply: VDDQ = 2.5V ± 0.2V : VDD = 2.5V ± 0.2V • Data rate: 333Mbps/266Mbps (max.) • Double Data Rate architecture; two data transfers per clock cycle • Bi-directional, data strobe (DQS) is transmitted /received with data, to be used in capturing data at the receiver • Data inputs, outputs, and DM are synchronized with DQS • 4 internal banks for concurrent operation • DQS is edge aligned with data for READs; center aligned with data for WRITEs • Differential clock inputs (CK and /CK) • DLL aligns DQ and DQS transitions with CK transitions • Commands entered on each positive CK edge; data and data mask referenced to both edges of DQS • Data mask (DM) for write data • Auto precharge option for each burst access • 2.5 V (SSTL_2 compatible) I/O • Programmable burst length (BL): 2, 4, 8 • Programmable /CAS latency (CL): 2, 2.5 • Refresh cycles: 8192 refresh cycles/64ms ⎯ 7.8μs maximum average periodic refresh interval • 2 variations of refresh ⎯ Auto refresh ⎯ Self refresh 66-pin plastic TSOP(II) VDD VDD DQ0 DQ0 VDDQ VDDQ NC DQ1 DQ1 DQ2 VSSQ VSSQ NC DQ3 DQ2 DQ4 VDDQ VDDQ NC DQ5 DQ3 DQ6 VSSQ VSSQ NC DQ7 NC NC VDDQ VDDQ NC LDQS NC NC VDD VDD NC NC NC LDM /WE /WE /CAS /CAS /RAS /RAS /CS /CS NC NC BA0 BA0 BA1 BA1 A10(AP) A10(AP) A0 A0 A1 A1 A2 A2 A3 A3 VDD VDD X 16 X8 (Top view) A0 to A12 BA0, BA1 DQ0 to DQ15 DQS, UDQS, LDQS /CS /RAS /CAS /WE DM, UDM, LDM CK /CK CKE VREF VDD VSS VDDQ VSSQ NC Address input Bank select address Data-input/output Input and output data strobe Chip select Row address strobe command Column address strobe command Write enable Input mask Clock input Differential clock input Clock enable Input reference voltage Power for internal circuit Ground for internal circuit Power for DQ circuit Ground for DQ circuit No connection t uc Document No. E0405E10 (Ver. 1.0) Date Published September 2003 (K) Japan URL: http://www.elpida.com VSS VSS DQ15 DQ7 VSSQ VSSQ DQ14 NC DQ13 DQ6 VDDQ VDDQ DQ12 NC DQ11 DQ5 VSSQ VSSQ DQ10 NC DQ9 DQ4 VDDQ VDDQ DQ8 NC NC NC VSSQ VSSQ UDQS DQS NC NC VREF VREF VSS VSS UDM DM /CK /CK CK CK CKE CKE NC NC A12 A12 A11 A11 A9 A9 A8 A8 A7 A7 A6 A6 A5 A5 A4 A4 VSS VSS This product became EOL in March, 2007. ©Elpida Memory, Inc. 2003 EDD2508AMTA, EDD2516AMTA Ordering Information Mask version Part number EDD2508AMTA-6B EDD2508AMTA-7A EDD2508AMTA-7B EDD2516AMTA-6B EDD2516AMTA-7A EDD2516AMTA-7B M Organization (words × bits) 32M × 8 Internal banks 4 16M × 16 Data rate Mbps (max.) JEDEC speed bin (CL-tRCD-tRP) 333 266 266 333 266 266 DDR-333B (2.5-3-3) DDR-266A (2-3-3) DDR-266B (2.5-3-3) DDR-333B (2.5-3-3) DDR-266A (2-3-3) DDR-266B (2.5-3-3) Package 66-pin Plastic TSOP (II) Part Number EO E D D 25 16 A M TA - 6B Elpida Memory Type D: Monolithic Device Product Code D: DDR SDRAM L Density / Bank 25: 256M / 4-bank Bit Organization 08: x8 16: x16 Die Rev. Package TA: TSOP (II) t uc od Speed 6B: DDR333B (2.5-3-3) 7A: DDR266A (2-3-3) 7B: DDR266B (2.5-3-3) Pr Voltage, Interface A: 2.5V, SSTL_2 Preliminary Data Sheet E0405E10 (Ver. 1.0) 2 EDD2508AMTA, EDD2516AMTA CONTENTS Description .................................................................................................................................................... 1 Features ........................................................................................................................................................ 1 Pin Configurations......................................................................................................................................... 1 Ordering Information ..................................................................................................................................... 2 Part Number.................................................................................................................................................. 2 Electrical Specifications ................................................................................................................................ 4 Block Diagram............................................................................................................................................. 11 Pin Function ................................................................................................................................................ 12 Command Operation................................................................................................................................... 14 EO Simplified State Diagram ............................................................................................................................ 22 Operation of the DDR SDRAM ................................................................................................................... 23 Timing Waveforms ...................................................................................................................................... 25 Package Drawing........................................................................................................................................ 31 Recommended Soldering Conditions ......................................................................................................... 32 L t uc od Pr Preliminary Data Sheet E0405E10 (Ver. 1.0) 3 EDD2508AMTA, EDD2516AMTA Electrical Specifications • All voltages are referenced to VSS (GND). • After power up, wait more than 200 µs and then, execute power on sequence and CBR (Auto) refresh before proper device operation is achieved. Absolute Maximum Ratings Parameter Symbol Rating Unit Voltage on input pin relative to VSS VI –0.5 to VDD +0.5 V Voltage on DQ and DQS pin relative to VSS VIO –0.5 to VDDQ +0.5 V Supply voltage relative to VSS VDD –0.5 to +3.7 V Supply voltage for output relative to VSS VDDQ –0.5 to +3.7 V IOS 50 mA Power dissipation PD 1.0 W Operating temperature TA 0 to +70 °C Storage temperature Tstg –55 to +125 °C EO Short circuit output current Note Caution Exposing the device to stress above those listed in Absolute Maximum Ratings could cause permanent damage. The device is not meant to be operated under conditions outside the limits described in the operational section of this specification. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. L Recommended DC Operating Conditions (TA = 0 to 70°C) Parameter Symbol min typ max Unit Notes 2.3 2.5 2.7 V 1 0 0 0 V VREF 0.49 × VDDQ 0.50 × VDDQ 0.51 × VDDQ V Termination voltage VTT VREF – 0.04 VREF VREF + 0.04 V Input high voltage VIH (DC) VREF + 0.15 — VDDQ + 0.3 V Input low voltage VIL (DC) –0.3 — VREF – 0.15 V VIN (DC) –0.3 — VDDQ + 0.3 V VIX (DC) 0.5 × VDDQ − 0.2V 0.5 × VDDQ 0.5 × VDDQ + 0.2V V VID (DC) 0.36 — VDDQ + 0.6 Supply voltage V 2 3, 4 VDDQ must be lower than or equal to VDD. VIN (DC) specifies the allowable DC execution of each differential input. VID (DC) specifies the input differential voltage required for switching. VIH (CK) min assumed over VREF + 0.18V, VIL (CK) max assumed under VREF – 0.18V if measurement. t uc Notes: 1. 2. 3. 4. od Input voltage level, CK and /CK inputs Input differential cross point voltage, CK and /CK inputs Input differential voltage, CK and /CK inputs Pr Input reference voltage VDD, VDDQ VSS, VSSQ Preliminary Data Sheet E0405E10 (Ver. 1.0) 4 EDD2508AMTA, EDD2516AMTA AC Overshoot/Undershoot Specification Parameter Specification Maximum peak amplitude allowed for overshoot 1.6V Maximum peak amplitude allowed for undershoot 1.6V The area between the overshoot signal and VDD must be less than or equal to 4.5V-ns The area between the undershoot signal and GND must be less than or equal to 4.5V-ns Maximum amplitude = 1.6V Overshoot area 4.5V-ns (max.) EO 5 4 3 2 Volts (V) 1 0 −1 −2 −3 VDD Ground Undershoot area 4.5V-ns (max.) 0 1 2 3 4 5 6 Time (ns) L t uc od Pr Preliminary Data Sheet E0405E10 (Ver. 1.0) 5 EDD2508AMTA, EDD2516AMTA DC Characteristics 1 (TA = 0 to +70°C, VDD, VDDQ = 2.5V ± 0.2V, VSS, VSSQ = 0V) max. Symbol Grade ×8 × 16 Unit Operating current (ACT-PRE) IDD0 -6B -7A, -7B 80 75 85 80 mA Operating current (ACT-READ-PRE) IDD1 -6B -7A, -7B 115 100 125 115 mA Idle power down standby current IDD2P 4 4 mA Floating idle standby current IDD2F Quiet idle standby current IDD2Q 35 30 35 30 25 20 40 35 200 135 175 125 145 140 35 30 35 30 25 20 45 40 250 180 200 160 145 140 3 3 mA 300 260 330 300 mA EO Parameter Active power down standby current IDD3P Active standby current IDD3N Operating current (Burst read operation) Operating current (Burst write operation) Auto Refresh current -6B -7A, -7B -6B -7A, -7B -6B -7A, -7B -6B -7A, -7B -6B -7A, -7B -6B -7A, -7B -6B -7A, -7B IDD4R IDD4W IDD5 L Self refresh current IDD6 Operating current (4 banks interleaving) IDD7A -6B -7A, -7B mA mA mA mA mA mA mA Test condition CKE ≥ VIH, tRC = tRC (min.) CKE ≥ VIH, BL = 4, CL = 2.5, tRC = tRC (min.) CKE ≤ VIL CKE ≥ VIH, /CS ≥ VIH DQ, DQS, DM = VREF CKE ≥ VIH, /CS ≥ VIH DQ, DQS, DM = VREF CKE ≤ VIL CKE ≥ VIH, /CS ≥ VIH tRAS = tRAS (max.) CKE ≥ VIH, BL = 2, CL = 2.5 CKE ≥ VIH, BL = 2, CL = 2.5 tRFC = tRFC (min.), Input ≤ VIL or ≥ VIH Input ≥ VDD – 0.2 V Input ≤ 0.2 V BL = 4 Notes 1, 2, 9 1, 2, 5 4 4, 5 4, 10 3 3, 5, 6 1, 2, 5, 6 1, 2, 5, 6 5, 6, 7 od Pr Notes: 1. These IDD data are measured under condition that DQ pins are not connected. 2. One bank operation. 3. One bank active. 4. All banks idle. 5. Command/Address transition once per one clock cycle. 6. DQ, DM and DQS transition twice per one clock cycle. 7. 4 banks active. Only one bank is running at tRC = tRC (min.) 8. The IDD data on this table are measured with regard to tCK = tCK (min.) in general. 9. Command/Address transition once every two clock cycle. 10. Command/Address stable at ≥ VIH or ≤ VIL. DC Characteristics 2 (TA = 0 to +70°C, VDD, VDDQ = 2.5V ± 0.2V, VSS, VSSQ = 0V) Parameter Symbol max. Unit Test condition Input leakage current Output leakage current ILI –2 2 µA VDD ≥ VIN ≥ VSS ILO –5 5 µA VDDQ ≥ VOUT ≥ VSS Output high current IOH –16.2 — mA VOUT = 1.95V Output low current IOL 16.2 — mA Preliminary Data Sheet E0405E10 (Ver. 1.0) 6 Notes t uc min. VOUT = 0.35V EDD2508AMTA, EDD2516AMTA Pin Capacitance (TA = +25°C, VDD, VDDQ = 2.5V ± 0.2V) Parameter Symbol Pins min. Typ max. Unit Notes Input capacitance CI1 CK, /CK 2.0 — 3.0 pF 1 CI2 All other input pins 2.0 — 3.0 pF 1 Delta input capacitance Cdi1 CK, /CK — — 0.25 pF 1 Cdi2 All other input-only pins — — 0.5 pF 1 Data input/output capacitance CI/O DQ, DM, DQS 4.0 — 5 pF 1, 2, Delta input/output capacitance Cdio DQ, DM, DQS — — 0.5 pF 1 Notes: 1. These parameters are measured on conditions: TA = +25°C. 2. DOUT circuits are disabled. f = 100MHz, VOUT = VDDQ/2, ΔVOUT = 0.2V, EO AC Characteristics (TA = 0 to +70°C, VDD, VDDQ = 2.5V ± 0.2V, VSS, VSSQ = 0V) -6B -7A -7B Parameter Symbol min. max. min. max. min. max Unit Notes Clock cycle time (CL = 2) tCK 7.5 12 7.5 12 10 12 ns 10 (CL = 2.5) tCK 6 12 7.5 12 7.5 12 ns CK high-level width 0.55 0.45 0.55 0.45 0.55 tCK tCL tCH 0.45 0.55 0.45 0.55 0.45 0.55 tCK CK half period tHP min (tCH, tCL) — min (tCH, tCL) — min (tCH, tCL) — tCK tAC –0.7 0.7 –0.75 0.75 –0.75 0.75 ns 2, 11 tDQSCK –0.6 0.6 –0.75 0.75 –0.75 0.75 ns 2, 11 tDQSQ 0.45 — 0.5 — 0.5 ns 3 L 0.45 CK low-level width DQS to DQ skew Pr DQ output access time from CK, /CK DQS output access time from CK, /CK — tHP – tQHS — tHP – tQHS — tHP – tQHS — ns Data hold skew factor tQHS — 0.55 — 0.75 — 0.75 ns tHZ –0.7 0.7 –0.75 0.75 –0.75 0.75 ns 5, 11 tLZ –0.7 0.75 ns 6, 11 Data-out high-impedance time from CK, /CK Data-out low-impedance time from CK, /CK tRPRE 0.9 Read postamble tRPST 0.4 DQ and DM input setup time tDS 0.45 DQ and DM input hold time tDH 0.45 DQ and DM input pulse width tDIPW 1.75 Write preamble setup time tWPRES 0 0.7 –0.75 0.75 –0.75 1.1 0.9 1.1 0.9 1.1 tCK 0.6 0.4 0.6 0.4 0.6 tCK — 0.5 — 0.5 — ns 8 — 0.5 — 0.5 — ns 8 — 1.75 — 1.75 — ns 7 — 0 — 0 — ns t uc Read preamble od DQ/DQS output hold time from DQS tQH Write preamble tWPRE 0.25 — 0.25 — 0.25 — tCK Write postamble tWPST 0.4 0.6 0.4 0.6 0.4 0.6 tCK Write command to first DQS latching tDQSS transition 0.75 1.25 0.75 1.25 0.75 1.25 tCK DQS falling edge to CK setup time tDSS 0.2 — 0.2 — 0.2 — tCK DQS falling edge hold time from CK tDSH 0.2 — 0.2 — 0.2 — tCK DQS input high pulse width tDQSH 0.35 — 0.35 — DQS input low pulse width tDQSL 0.35 — 0.35 — 0.75 — 0.9 — Address and control input setup time tIS Preliminary Data Sheet E0405E10 (Ver. 1.0) 7 0.35 — tCK 0.35 — tCK 0.9 — ns 9 8 EDD2508AMTA, EDD2516AMTA -6B -7A -7B Parameter Symbol min. max. min. max. min. max Unit Notes Address and control input hold time tIH 0.75 — 0.9 — 0.9 — ns 8 Address and control input pulse width tIPW 2.2 — 2.2 — 2.2 — ns 7 Mode register set command cycle time 2 — 2 — 2 — tCK 42 120000 45 120000 45 120000 ns tRC 60 — 65 — 65 — ns tRFC 72 — 75 — 75 — ns tRCD 18 — 20 — 20 — ns tMRD Active to Precharge command period tRAS Active to Active/Auto refresh command period Auto refresh to Active/Auto refresh command period Active to Read/Write delay 18 — 20 — 20 — ns Active to Autoprecharge delay tRAP tRCD min. — tRCD min. — tRCD min. — ns Active to active command period tRRD 12 — 15 — 15 — ns Write recovery time tWR 15 — 15 — 15 — ns tDAL (tWR/tCK)+ — (tRP/tCK) (tWR/tCK)+ — (tRP/tCK) (tWR/tCK)+ — (tRP/tCK) tCK tWTR 1 — 1 — 1 — tCK tREF — 7.8 — 7.8 — 7.8 µs EO Precharge to active command period tRP Auto precharge write recovery and precharge time Internal write to Read command delay Average periodic refresh interval 13 L Notes: 1. On all AC measurements, we assume the test conditions shown in the next page. For timing parameter definitions, see ‘Timing Waveforms’ section. 2. This parameter defines the signal transition delay from the cross point of CK and /CK. The signal transition is defined to occur when the signal level crossing VTT. 3. The timing reference level is VTT. 4. Output valid window is defined to be the period between two successive transition of data out or DQS (read) signals. The signal transition is defined to occur when the signal level crossing VTT. 5. tHZ is defined as DOUT transition delay from Low-Z to High-Z at the end of read burst operation. The timing reference is cross point of CK and /CK. This parameter is not referred to a specific DOUT voltage level, but specify when the device output stops driving. 6. tLZ is defined as DOUT transition delay from High-Z to Low-Z at the beginning of read operation. This parameter is not referred to a specific DOUT voltage level, but specify when the device output begins driving. 7. Input valid windows is defined to be the period between two successive transition of data input or DQS (write) signals. The signal transition is defined to occur when the signal level crossing VREF. 8. The timing reference level is VREF. 9. The transition from Low-Z to High-Z is defined to occur when the device output stops driving. A specific reference voltage to judge this transition is not given. 10. tCK (max.) is determined by the lock range of the DLL. Beyond this lock range, the DLL operation is not assured. 11. tCK = tCK (min) when these parameters are measured. Otherwise, absolute minimum values of these values are 10% of tCK. 12. VDD is assumed to be 2.5V ± 0.2V. VDD power supply variation per cycle expected to be less than 0.4V/400 cycle. 13. tDAL = (tWR/tCK)+(tRP/tCK) For each of the terms above, if not already an integer, round to the next highest integer. Example: For –7A Speed at CL = 2.5, tCK = 7.5ns, tWR = 15ns and tRP= 20ns, tDAL = (15ns/7.5ns) + (20ns/7.5ns) = (2) + (3) tDAL = 5 clocks t uc od Pr Preliminary Data Sheet E0405E10 (Ver. 1.0) 8 EDD2508AMTA, EDD2516AMTA Test Conditions Parameter Symbol Value Unit Input reference voltage VREF VDDQ/2 V Termination voltage VTT VREF V Input high voltage VIH (AC) VREF + 0.31 V Input low voltage VIL (AC) VREF − 0.31 V VID (AC) 0.7 V VIX (AC) VREF V SLEW 1 V/ns Input differential voltage, CK and /CK inputs Input differential cross point voltage, CK and /CK inputs Input signal slew rate VDD CK VID VREF /CK VSS tCL tCH VIX VDD L EO tCK VIH VIL VREF VSS Δt Pr SLEW = (VIH (AC) – VIL (AC))/Δt VTT Measurement point od DQ RT = 50Ω CL = 30pF Input Waveforms and Output Load t uc Preliminary Data Sheet E0405E10 (Ver. 1.0) 9 EDD2508AMTA, EDD2516AMTA Timing Parameter Measured in Clock Cycle Number of clock cycle tCK 6ns 7.5ns Symbol min. Write to pre-charge command delay (same bank) tWPD 4 + BL/2 3 + BL/2 tCK Read to pre-charge command delay (same bank) tRPD BL/2 BL/2 tCK Write to read command delay (to input all data) tWRD 2 + BL/2 2 + BL/2 tCK Burst stop command to write command delay (CL = 2) tBSTW 2 2 tCK (CL = 2.5) tBSTW 3 3 tCK Burst stop command to DQ High-Z (CL = 2) tBSTZ 2 2 2 2 tCK (CL = 2.5) tBSTZ 2.5 2.5 2.5 2.5 tCK Read command to write command delay (to output all data) (CL = 2) tRWD 2 + BL/2 2 + BL/2 tCK (CL = 2.5) tRWD 3 + BL/2 3 + BL/2 tCK Pre-charge command to High-Z (CL = 2) tHZP 2 2 2 2 tCK (CL = 2.5) tHZP 2.5 2.5 2.5 2.5 tCK Write command to data in latency tWCD 1 1 1 1 tCK tWR 3 tDMD 0 Write recovery L EO Parameter DM to data in latency max. min. max. 2 0 0 Unit tCK 0 tCK tMRD 2 2 tCK Self refresh exit to non-read command tSNR 12 10 tCK Self refresh exit to read command tSRD 200 200 tCK Power down entry Power down exit to command input Pr Mode register set command cycle time tPDEN 1 tPDEX 1 1 1 1 1 tCK tCK t uc od Preliminary Data Sheet E0405E10 (Ver. 1.0) 10 EDD2508AMTA, EDD2516AMTA Clock generator Block Diagram Bank 3 Bank 2 Bank 1 A0 to A12, BA0, BA1 Memory cell array Bank 0 Sense amp. L Control logic Command decoder EO /CS /RAS /CAS /WE Mode register Row address buffer and refresh counter Row decoder CK /CK CKE Column decoder Column address buffer and burst counter Data control circuit Latch circuit Pr DLL CK, /CK Input & Output buffer DQS DM DQ t uc od Preliminary Data Sheet E0405E10 (Ver. 1.0) 11 EDD2508AMTA, EDD2516AMTA Pin Function CK, /CK (input pins) The CK and the /CK are the master clock inputs. All inputs except DM, DQS and DQs are referred to the cross point of the CK rising edge and the /CK falling edge. When a read operation, DQS and DQs are referred to the cross point of the CK and the /CK. When a write operation, DQS and DQs are referred to the cross point of the DQS and the VREF level. DQS for write operation is referred to the cross point of the CK and the /CK. CK is the master clock input to this pin. The other input signals are referred at CK rising edge. /CS (input pin) When /CS is Low, commands and data can be input. When /CS is High, all inputs are ignored. However, internal operations (bank active, burst operations, etc.) are held. EO /RAS, /CAS, and /WE (input pins) These pins define operating commands (read, write, etc.) depending on the combinations of their voltage levels. See "Command operation". A0 to A12 (input pins) Row address (AX0 to AX12) is determined by the A0 to the A12 level at the cross point of the CK rising edge and the /CK falling edge in a bank active command cycle. Column address (See “Address Pins Table”) is loaded via the A0 to the A8 at the cross point of the CK rising edge and the /CK falling edge in a read or a write command cycle. This column address becomes the starting address of a burst operation. [Address Pins Table] L Address (A0 to A12) Part number EDD2508AM EDD2516AM Row address Column address AX0 to AX12 AY0 to AY9 AX0 to AX12 AY0 to AY8 Pr A10 (AP) (input pin) A10 defines the precharge mode when a precharge command, a read command or a write command is issued. If A10 = High when a precharge command is issued, all banks are precharged. If A10 = Low when a precharge command is issued, only the bank that is selected by BA1/BA0 is precharged. If A10 = High when read or write command, auto-precharge function is enabled. While A10 = Low, auto-precharge function is disabled. [Bank Select Signal Table] BA0 L Bank 1 H Bank 2 L Bank 3 H BA1 L L H t uc Bank 0 od BA0 and BA1 (input pins) BA0, BA1 are bank select signals (BA). The memory array is divided into bank 0, bank 1, bank 2 and bank 3. (See Bank Select Signal Table) H Remark: H: VIH. L: VIL. Preliminary Data Sheet E0405E10 (Ver. 1.0) 12 EDD2508AMTA, EDD2516AMTA CKE (input pin) This pin determines whether or not the next CK is valid. If CKE is High, the next CK rising edge is valid. If CKE is Low. CKE controls power down and self-refresh. The power down and the self-refresh commands are entered when the CKE is driven Low and exited when it resumes to High. CKE must be maintained high throughout read or write access. The CKE level must be kept for 1 CK cycle at least, that is, if CKE changes at the cross point of the CK rising edge and the /CK falling edge with proper setup time tIS, by the next CK rising edge CKE level must be kept with proper hold time tIH. EO DM, UDM, LDM (input pin) DMs are the reference signals of the data input mask function. DMs are sampled at the cross point of DQS and VREF. DMs provide the byte mask function. In × 16 products, LDM controls the lower byte (DQ0 to DQ7) and UDM controls the upper byte (DQ8 to DQ15) of write data. When DM = High, the data input at the same timing are masked while the internal burst counter will be count up. LDM controls the lower byte (DQ0 to DQ7) and UDM controls the upper byte (DQ8 to DQ15) of write data. DQ0 to DQ15 (input/output pins) Data is input to and output from these pins. DQS, UDQS, LDQS (input and output pin): DQS provide the read data strobes (as output) and the write data strobes (as input). In ×16 products, LDQS is the lower byte (DQ0 to DQ7) data strobe signal, UDQS is the upper byte (DQ8 to DQ15) data strobe signal. L VDD, VSS, VDDQ, VSSQ (Power supply) VDD and VSS are power supply pins for internal circuits. VDDQ and VSSQ are power supply pins for the output buffers. t uc od Pr Preliminary Data Sheet E0405E10 (Ver. 1.0) 13 EDD2508AMTA, EDD2516AMTA Command Operation Command Truth Table DDR SDRAM recognize the following commands specified by the /CS, /RAS, /CAS, /WE and address pins. All other combinations than those in the table below are illegal. CKE Symbol n–1 n /CS /RAS /CAS /WE BA1 BA0 AP Address Ignore command DESL H H H × × × × × × × No operation NOP H H L H H H × × × × Burst stop in read command BST H H L H H L × × × × Column address and read command READ H H L H L H V V L V Read with auto-precharge READA H H L H L H V V H V Column address and write command WRIT H H L H L L V V L V Write with auto-precharge WRITA H H L H L L V V H V Row address strobe and bank active ACT H H L L H H V V V V Precharge select bank PRE H H L L H L V V L × Precharge all bank PALL H H L L H L × × H × EO Command Refresh H H L L L H × × × × H L L L L H × × × × MRS H H L L L L L L L V EMRS H H L L L L L H L V L Mode register set REF SELF Remark: H: VIH. L: VIL. ×: VIH or VIL V: Valid address input Note: The CKE level must be kept for 1 CK cycle at least. Pr Ignore command [DESL] When /CS is High at the cross point of the CK rising edge and the VREF level, every input are neglected and internal status is held. od No operation [NOP] As long as this command is input at the cross point of the CK rising edge and the VREF level, address and data input are neglected and internal status is held. Burst stop in read operation [BST] This command stops a burst read operation, which is not applicable for a burst write operation. t uc Column address strobe and read command [READ] This command starts a read operation. The start address of the burst read is determined by the column address (See “Address Pins Table” in Pin Function) and the bank select address. After the completion of the read operation, the output buffer becomes High-Z. Read with auto-precharge [READA] This command starts a read operation. After completion of the read operation, precharge is automatically executed. Column address strobe and write command [WRIT] This command starts a write operation. The start address of the burst write is determined by the column address (See “Address Pins Table” in Pin Function) and the bank select address. Write with auto-precharge [WRITA] This command starts a write operation. After completion of the write operation, precharge is automatically executed. Preliminary Data Sheet E0405E10 (Ver. 1.0) 14 EDD2508AMTA, EDD2516AMTA Row address strobe and bank activate [ACT] This command activates the bank that is selected by BA0, BA1 and determines the row address (AX0 to AX12). (See Bank Select Signal Table) Precharge selected bank [PRE] This command starts precharge operation for the bank selected by BA0, BA1. (See Bank Select Signal Table) [Bank Select Signal Table] BA0 BA1 Bank 0 L L Bank 1 H L Bank 2 L H Bank 3 H H EO Remark: H: VIH. L: VIL. Precharge all banks [PALL] This command starts a precharge operation for all banks. Refresh [REF/SELF] This command starts a refresh operation. There are two types of refresh operation, one is auto-refresh, and another is self-refresh. For details, refer to the CKE truth table section. L Mode register set/Extended mode register set [MRS/EMRS] The DDR SDRAM has the two mode registers, the mode register and the extended mode register, to defines how it works. The both mode registers are set through the address pins (the A0 to the A12, BA0 to BA1) in the mode register set cycle. For details, refer to "Mode register and extended mode register set". Pr CKE Truth Table CKE Current state Command n–1 n /CS /RAS /CAS /WE Address Notes Auto-refresh command (REF) H H L L L H × 2 Idle Self-refresh entry (SELF) H L L L L H × 2 Idle Power down entry (PDEN) H L L H H H × H L H × × × × Self refresh Self refresh exit (SELFX) L H L H H H × L H H × × × × Power down Power down exit (PDEX) od Idle L H L H H H × L H H × × × × Preliminary Data Sheet E0405E10 (Ver. 1.0) 15 t uc Remark: H: VIH. L: VIL. ×: VIH or VIL. Notes: 1. All the banks must be in IDLE before executing this command. 2. The CKE level must be kept for 1 CK cycle at least. EDD2508AMTA, EDD2516AMTA Function Truth Table The following tables show the operations that are performed when each command is issued in each state of the DDR SDRAM. Function Truth Table Current state Precharging* 1 /CS /RAS /CAS /WE Address Command Operation Next state H × × × × DESL NOP ldle L H H H × NOP NOP L H H H BA, CA, A10 READ/READA ILLEGAL* L L BA, CA, A10 WRIT/WRITA ILLEGAL*11 — 11 ILLEGAL* — EO H BA, RA ACT PRE, PALL L L H L BA, A10 L L L × × H × × × × L H H H L H H L H L H NOP ldle ILLEGAL — DESL NOP ldle × NOP NOP ldle × BST ILLEGAL*11 — ILLEGAL* 11 — 11 BA, CA, A10 READ/READA L H L L BA, CA, A10 WRIT/WRITA ILLEGAL* L L H H BA, RA ACT Activating L L H L BA, A10 PRE, PALL NOP ldle ldle/ Self refresh L — Active L L L H × REF, SELF Refresh/ Self refresh*12 L L L L MODE MRS Mode register set*12 ldle H × × × × DESL NOP ldle L H H H × NOP NOP ldle BST Pr Activating* — L H L 4 — 11 ILLEGAL* H H Refresh (auto-refresh)*3 BST L L Idle* × L L 2 L ldle 11 L H H L × ILLEGAL — L H L × × ILLEGAL — L L × × × ILLEGAL — NOP Active × × × × L H H H × L H H L × DESL od H NOP BST NOP Active 11 — 11 — ILLEGAL* L H L H BA, CA, A10 READ/READA ILLEGAL* L H L L BA, CA, A10 WRIT/WRITA ILLEGAL*11 — 11 — 11 ILLEGAL* — ILLEGAL — L L H H BA, RA L H L BA, A10 L L L × × PRE, PALL ILLEGAL* t uc L ACT Preliminary Data Sheet E0405E10 (Ver. 1.0) 16 EDD2508AMTA, EDD2516AMTA Current state 5 Active* /CS /RAS /CAS /WE Address Command Operation Next state H × × × × DESL NOP Active L H H H × NOP NOP Active L H H L × BST ILLEGAL Active L H L H BA, CA, A10 READ/READA Starting read operation Read/READA L H L L BA, CA, A10 WRIT/WRITA Write Starting write operation recovering/ precharging L L H H BA, RA ACT ILLEGAL*11 — L L H L BA, A10 PRE, PALL Pre-charge Idle L L L × × ILLEGAL — H × × × × DESL NOP Active EO NOP Active Read*6 L H H H × NOP L H H L × BST BST Active Active L H L H BA, CA, A10 READ/READA Interrupting burst read operation to start new read L H L L BA, CA, A10 WRIT/WRITA ILLEGAL*13 — 11 L L L L H H H L BA, RA BA, A10 L ACT ILLEGAL* — PRE, PALL Interrupting burst read operation to start pre-charge Precharging ILLEGAL — L L × × × × × × DESL NOP Precharging L H H H × NOP NOP Precharging L H H L × BST ILLEGAL — L H L H BA, CA, A10 READ/READA ILLEGAL*14 — L H L L BA, CA, A10 WRIT/WRITA ILLEGAL*14 — 11, 14 L L H H BA, RA ACT ILLEGAL* — L L H L BA, A10 PRE, PALL ILLEGAL*11, 14 — L L L × × ILLEGAL od Write*8 Pr L Read with auto-preH charge*7 H × × × × L H H H × L H H L × L H L H BA, CA, A10 READ/READA L H L L BA, CA, A10 WRIT/WRITA L L H H BA, RA ACT L L H L BA, A10 PRE, PALL L L L × × 17 NOP NOP NOP BST ILLEGAL Interrupting burst write operation to start read operation. Interrupting burst write operation to start new write operation. — Read/ReadA t uc Preliminary Data Sheet E0405E10 (Ver. 1.0) DESL — Write recovering Write recovering Write/WriteA ILLEGAL*11 — Interrupting write operation to start precharge. Idle ILLEGAL — EDD2508AMTA, EDD2516AMTA Current state 9 Write recovering* Write with autopre-charge*10 /CS /RAS /CAS /WE Address Command Operation Next state H × × × × DESL NOP Active L H H H × NOP NOP Active L H H L × BST ILLEGAL — L H L H BA, CA, A10 READ/READA Starting read operation. Read/ReadA Write/WriteA L H L L BA, CA, A10 WRIT/WRITA Starting new write operation. L L H H BA, RA ACT ILLEGAL*11 — 11 L H L BA, A10 L L L × × H × × × × L H H H L H H L EO L PRE/PALL ILLEGAL* — ILLEGAL — DESL NOP Precharging × NOP NOP Precharging × BST ILLEGAL — 14 — — L H L H BA, CA, A10 READ/READA ILLEGAL* L H L L BA, CA, A10 WRIT/WRIT A ILLEGAL*14 L L H H BA, RA L L H L BA, A10 L L L × × ACT PRE, PALL 11, 14 — 11, 14 ILLEGAL* — ILLEGAL — ILLEGAL* L H: VIH. L: VIL. ×: VIH or VIL The DDR SDRAM is in "Precharging" state for tRP after precharge command is issued. The DDR SDRAM reaches "IDLE" state tRP after precharge command is issued. The DDR SDRAM is in "Refresh" state for tRFC after auto-refresh command is issued. The DDR SDRAM is in "Activating" state for tRCD after ACT command is issued. The DDR SDRAM is in "Active" state after "Activating" is completed. The DDR SDRAM is in "READ" state until burst data have been output and DQ output circuits are turned off. 7. The DDR SDRAM is in "READ with auto-precharge" from READA command until burst data has been output and DQ output circuits are turned off. 8. The DDR SDRAM is in "WRITE" state from WRIT command to the last burst data are input. 9. The DDR SDRAM is in "Write recovering" for tWR after the last data are input. 10. The DDR SDRAM is in "Write with auto-precharge" until tWR after the last data has been input. 11. This command may be issued for other banks, depending on the state of the banks. 12. All banks must be in "IDLE". 13. Before executing a write command to stop the preceding burst read operation, BST command must be issued. t uc od Pr Remark: Notes: 1. 2. 3. 4. 5. 6. Preliminary Data Sheet E0405E10 (Ver. 1.0) 18 EDD2508AMTA, EDD2516AMTA 14. The DDR SDRAM supports the concurrent auto-precharge feature, a read with auto-precharge enabled,or a write with auto-precharge enabled, may be followed by any column command to other banks, as long as that command does not interrupt the read or write data transfer, and all other related limitations apply. (E.g. Conflict between READ data and WRITE data must be avoided.) The minimum delay from a read or write command with auto precharge enabled, to a command to a different bank, is summarized below. From command To command (different bank, noninterrupting command) Minimum delay (Concurrent AP supported) Units Read w/AP Read or Read w/AP BL/2 tCK Write or Write w/AP CL(rounded up)+ (BL/2) tCK Precharge or Activate 1 tCK Read or Read w/AP 1 + (BL/2) + tWTR tCK Write or Write w/AP BL/2 tCK Precharge or Activate 1 tCK Write w/AP L EO t uc od Pr Preliminary Data Sheet E0405E10 (Ver. 1.0) 19 EDD2508AMTA, EDD2516AMTA Command Truth Table for CKE Current State CKE n–1 n Self refresh Self refresh recovery Notes × × × × × × INVALID, CK (n-1) would exit self refresh L H H × × × × Self refresh recovery L H L H H × × Self refresh recovery L H L H L × × ILLEGAL L H L L × × × ILLEGAL L L × × × × × Maintain self refresh H H H × × × × Idle after tRC H H L H H × × Idle after tRC H H L H L × × ILLEGAL H H L L × × × ILLEGAL H L H × × × × ILLEGAL H L L H H × × ILLEGAL H L L H L × × ILLEGAL H L L L × × × ILLEGAL H × × × × × L H H × × × × L H L H H H × × INVALID, CK (n – 1) would exit power down EXIT power down → Idle L L × × × × H H H × × × Refer to operations in Function Truth Table H H L H × × Refer to operations in Function Truth Table H H L L H × H H L L L H × H H L L L L OPCODE Refer to operations in Function Truth Table Maintain power down mode Pr Refer to operations in Function Truth Table CBR (auto) refresh H L H × × × Refer to operations in Function Truth Table H L L H × × Refer to operations in Function Truth Table H L L L H × Refer to operations in Function Truth Table H L L L L H H L L L L L L × × × × × H × × × × × L × × × × × od Row active Operation L All banks idle /RAS /CAS /WE Address H EO Power down /CS × Self refresh 1 OPCODE Refer to operations in Function Truth Table × Power down × Refer to operations in Function Truth Table × Power down 1 1 t uc Remark: H: VIH. L: VIL. ×: VIH or VIL Note: Self refresh can be entered only from the all banks idle state. Power down can be entered only from all banks idle or row active state. Preliminary Data Sheet E0405E10 (Ver. 1.0) 20 EDD2508AMTA, EDD2516AMTA Auto-refresh command [REF] This command executes auto-refresh. The banks and the ROW addresses to be refreshed are internally determined by the internal refresh controller. The average refresh cycle is 7.8 μs. The output buffer becomes High-Z after autorefresh start. Precharge has been completed automatically after the auto-refresh. The ACT or MRS command can be issued tRFC after the last auto-refresh command. Self-refresh entry [SELF] This command starts self-refresh. The self-refresh operation continues as long as CKE is held Low. During the selfrefresh operation, all ROW addresses are repeated refreshing by the internal refresh controller. A self-refresh is terminated by a self-refresh exit command. EO Power down mode entry [PDEN] tPDEN (= 1 cycle) after the cycle when [PDEN] is issued. The DDR SDRAM enters into power-down mode. In power down mode, power consumption is suppressed by deactivating the input initial circuit. Power down mode continues while CKE is held Low. No internal refresh operation occurs during the power down mode. [PDEN] do not disable DLL. Self-refresh exit [SELFX] This command is executed to exit from self-refresh mode. To issue non-read commands, tSNR has to be satisfied. ((tSNR =)10 cycles for tCK = 7.5 ns or 12 cycles for tCK = 6.0 ns after [SELFX]) To issue read command, tSRD has to be satisfied to adjust DOUT timing by DLL. (200 cycles after [SELFX]) After the exit, input auto-refresh command within 7.8 μs. L Power down exit [PDEX] The DDR SDRAM can exit from power down mode tPDEX (1 cycle min.) after the cycle when [PDEX] is issued. t uc od Pr Preliminary Data Sheet E0405E10 (Ver. 1.0) 21 EDD2508AMTA, EDD2516AMTA Simplified State Diagram SELF REFRESH SR ENTRY SR EXIT MRS MODE REGISTER SET REFRESH IDLE *1 AUTO REFRESH CKE CKE_ CKE_ CKE ROW ACTIVE BST WRITE Write READ WRITE WITH AP WRITE L EO IDLE POWER DOWN ACTIVE ACTIVE POWER DOWN WRITE WITH AP READ WITH AP READ READ READ WITH AP READ WITH AP PRECHARGE WRITEA READA PRECHARGE PRECHARGE Pr POWER APPLIED Read POWER ON PRECHARGE PRECHARGE od Automatic transition after completion of command. Transition resulting from command input. Note: 1. After the auto-refresh operation, precharge operation is performed automatically and enter the IDLE state. t uc Preliminary Data Sheet E0405E10 (Ver. 1.0) 22 EDD2508AMTA, EDD2516AMTA Operation of the DDR SDRAM Power-up Sequence EO The following sequence is recommended for Power-up. (1) Apply power and attempt to maintain CKE at an LVCMOS low state (all other inputs may be undefined). Apply VDD before or at the same time as VDDQ. Apply VDDQ before or at the same time as VTT and VREF. (2) Start clock and maintain stable condition for a minimum of 200 µs. (3) After the minimum 200 µs of stable power and clock (CK, /CK), apply NOP and take CKE high. (4) Issue precharge all command for the device. (5) Issue EMRS to enable DLL. (6) Issue a mode register set command (MRS) for "DLL reset" with bit A8 set to high (An additional 200 cycles of clock input is required to lock the DLL after every DLL reset). (7) Issue precharge all command for the device. (8) Issue 2 or more auto-refresh commands. (9) Issue a mode register set command to initialize device operation with bit A8 set to low in order to avoid resetting the DLL. (4) (5) (6) (7) (8) (9) /CK CK L Command PALL MRS EMRS 2 cycles (min.) PALL REF REF REF tRP 2 cycles (min.) 2 cycles (min.) tRFC tRFC DLL reset with A8 = High DLL enable Any command MRS 2 cycles (min.) Disable DLL reset with A8 = Low 200 cycles (min) Pr Power-up Sequence after CKE Goes High Mode Register and Extended Mode Register Set BA0 BA1 A12 0 0 0 A11 A10 A9 0 0 0 od There are two mode registers, the mode register and the extended mode register so as to define the operating mode. Parameters are set to both through the A0 to the A12 and BA0, BA1 pins by the mode register set command [MRS] or the extended mode register set command [EMRS]. The mode register and the extended mode register are set by inputting signal via the A0 to the A12 and BA0, BA1 during mode register set cycles. BA0 and BA1 determine which one of the mode register or the extended mode register are set. Prior to a read or a write operation, the mode register must be set. Remind that no other parameters shown in the table bellow are allowed to input to the registers. A8 A7 DR 0 A6 1 0 2.5 A3 23 A1 BT A3 Burst Type 0 Sequential 1 Interleave Mode Register Set [MRS] (BA0 = 0, BA1 = 0) Preliminary Data Sheet E0405E10 (Ver. 1.0) A2 A0 BL t uc A8 DLL Reset A6 A5 A4 CAS Latency 2 0 1 0 0 No 1 A4 LMODE MRS 1 Yes A5 A2 A1 A0 Burst Length 0 0 0 1 BT=0 BT=1 2 2 1 4 4 0 0 1 1 8 8 EDD2508AMTA, EDD2516AMTA BA0 BA1 1 A12 A11 A10 A9 0 0 0 0 0 A8 A7 A6 A5 A4 A3 A2 A1 A0 0 0 0 0 0 0 0 0 DLL EMRS A0 DLL Control 0 DLL Enable 1 DLL Disable Extended Mode Register Set [EMRS] (BA0 = 1, BA1 = 0) Burst Operation EO The burst type (BT) and the first three bits of the column address determine the order of a data out. Burst length = 2 Burst length = 4 Starting Ad. Addressing(decimal) A0 Sequence Starting Ad. Addressing(decimal) Interleave A1 A0 0 0, 1, 0, 1, 0 0 0, 1, 2, 3, 0, 1, 2, 3, 1 1, 0, 1, 0, 0 1 1, 2, 3, 0, 1, 0, 3, 2, 1 0 2, 3, 0, 1, 2, 3, 0, 1, 1 1 3, 0, 1, 2, 3, 2, 1, 0, Sequence Interleave L Burst length = 8 Addressing(decimal) Starting Ad. A1 0 0 A0 Sequence 0 0, 1, 2, 3, 4, 5, 6, 7, Interleave 0, 1, 2, 3, 4, 5, 6, 7, 0 0 1 1, 2, 3, 4, 5, 6, 7, 0, 1, 0, 3, 2, 5, 4, 7, 6, 0 1 0 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 0, 1, 6, 7, 4, 5, 0 1 1 3, 4, 5, 6, 7, 0, 1, 2, 3, 2, 1, 0, 7, 6, 5, 4, 1 0 0 4, 5, 6, 7, 0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 1 0 1 5, 6, 7, 0, 1, 2, 3, 4, 5, 4, 7, 6, 1, 0, 3, 2, 1 1 0 6, 7, 0, 1, 2, 3, 4, 5, 6, 7, 4, 5, 2, 3, 0, 1, 1 1 1 7, 0, 1, 2, 3, 4, 5, 6, 7, 6, 5, 4, 3, 2, 1, 0, t uc od Pr A2 Preliminary Data Sheet E0405E10 (Ver. 1.0) 24 ;;;;;; EDD2508AMTA, EDD2516AMTA Timing Waveforms Command and Addresses Input Timing Definition CK /CK tIS Command (/RAS, /CAS, /WE, /CS) tIH VREF tIS tIH VREF Address Read Timing Definition EO /CK CK DQS tCL tCH tDQSCK tDQSCK tDQSCK tDQSCK tRPST tRPRE tDQSQ tLZ L DQ (Dout) tCK tAC tDQSQ tQH tAC tAC tQH tHZ tDQSQ tDQSQ tQH tQH Write Timing Definition tCK tDQSS DQS tWPRES Pr /CK CK tDSS tDQSL tWPRE tDS DM tDS tDH tDH tDSS VREF tDQSH tWPST od DQ (Din) tDSH VREF tDIPW tDIPW VREF tDIPW t uc Preliminary Data Sheet E0405E10 (Ver. 1.0) 25 EDD2508AMTA, EDD2516AMTA Read Cycle tCK tCH tCL CK /CK tRC VIH CKE tRAS tRCD tRP tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH /CS /RAS EO /CAS /WE BA L A10 tIS tIH Address DQS DQ (output) High-Z High-Z Pr DM Bank 0 Read tRPST od Bank 0 Active tRPRE Bank 0 Precharge CL = 2 BL = 4 Bank0 Access = VIH or VIL t uc Preliminary Data Sheet E0405E10 (Ver. 1.0) 26 EDD2508AMTA, EDD2516AMTA Write Cycle tCK tCH tCL CK /CK tRC VIH CKE tRAS tRP tRCD tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH tIS tIH /CS /RAS EO /CAS /WE BA Address L A10 tIS tIH tDQSS tDQSL tWPST Pr DQS (input) tDQSH tDS tDS DM tDS tDH tDH od DQ (input) tWR tDH Bank 0 Active Bank 0 Write Bank 0 Precharge CL = 2 BL = 4 Bank0 Access = VIH or VIL t uc Preliminary Data Sheet E0405E10 (Ver. 1.0) 27 EDD2508AMTA, EDD2516AMTA Mode Register Set Cycle 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 /CK CK CKE VIH /CS /RAS /CAS /WE EO BA Address code C: b R: b code valid DM High-Z DQS High-Z b L DQ (output) tRP Mode register set Precharge If needed /CK CK CKE 0 VIH /CS 2 3 4 C:a R:b 5 /CAS /WE BA Address R:a 6 7 8 9 a 12 13 14 15 C:b'' b’’ High-Z b tRWD Bank 0 Active 11 CL = 2 BL = 4 = VIH or VIL t uc DQS DQ (input) 10 C:b DM DQ (output) Bank 3 Precharge od /RAS 1 Bank 3 Read Bank 3 Active Pr Read/Write Cycle tMRD tWRD Bank 0 Bank 3 Read Active Bank 3 Write Preliminary Data Sheet E0405E10 (Ver. 1.0) 28 Bank 3 Read Read cycle CL = 2 BL = 4 =VIH or VIL ;;;;; ; ; ; ; ; ; ;;; EDD2508AMTA, EDD2516AMTA ;;;;;;;;; ; ; ; ; ;;;;;;;;; ; ; ; ;; Auto Refresh Cycle /CK CK CKE VIH /CS /RAS /CAS /WE EO BA Address A10=1 R: b C: b DM DQS b DQ (output) L DQ (input) High-Z tRP Precharge If needed tRFC Auto Refresh Bank 0 Active Bank 0 Read t uc od Pr CL = 2 BL = 4 = VIH or VIL Preliminary Data Sheet E0405E10 (Ver. 1.0) 29 EDD2508AMTA, EDD2516AMTA Self Refresh Cycle /CK CK tIS tIH CKE CKE = low /CS /RAS /CAS EO /WE BA Address A10=1 R: b C: b DM DQ (output) L DQS High-Z DQ (input) tSNR tRP Pr Precharge If needed Self refresh entry Self refresh exit tSRD Bank 0 Active Bank 0 Read CL = 2.5 BL = 4 = VIH or VIL t uc od Preliminary Data Sheet E0405E10 (Ver. 1.0) 30 EDD2508AMTA, EDD2516AMTA Package Drawing 66-pin Plastic TSOP (II) Unit: mm 22.22 ± 0.10 * 1 A 0.25 0 to 10° 0.10 S 0.60 ± 0.15 Notes: 1. This dimension does not include mold flash. 2. This dimension does not include trim offset. Pr 0.71 0.86 max 0.80 Nom 0.125 ± 0.075 S B 0.13 M S A B L 1.0 ± 0.05 2 0.22 +0.1 −0.05* 33 0.65 0.125 +0.05 −0.02 1 1.20 max EO PIN#1 ID 11.76 ± 0.20 34 10.16 66 ECA-TS2-0097-01 t uc od Preliminary Data Sheet E0405E10 (Ver. 1.0) 31 EDD2508AMTA, EDD2516AMTA Recommended Soldering Conditions Please consult with our sales offices for soldering conditions of the EDD2508AM, EDD2516AM. Type of Surface Mount Device EDD2508AMTA, EDD2516AMTA: 66-pin Plastic TSOP (II) L EO t uc od Pr Preliminary Data Sheet E0405E10 (Ver. 1.0) 32 EDD2508AMTA, EDD2516AMTA NOTES FOR CMOS DEVICES 1 PRECAUTION AGAINST ESD FOR MOS DEVICES EO Exposing the MOS devices to a strong electric field can cause destruction of the gate oxide and ultimately degrade the MOS devices operation. Steps must be taken to stop generation of static electricity as much as possible, and quickly dissipate it, when once it has occurred. Environmental control must be adequate. When it is dry, humidifier should be used. It is recommended to avoid using insulators that easily build static electricity. MOS devices must be stored and transported in an anti-static container, static shielding bag or conductive material. All test and measurement tools including work bench and floor should be grounded. The operator should be grounded using wrist strap. MOS devices must not be touched with bare hands. Similar precautions need to be taken for PW boards with semiconductor MOS devices on it. 2 HANDLING OF UNUSED INPUT PINS FOR CMOS DEVICES 3 L No connection for CMOS devices input pins can be a cause of malfunction. If no connection is provided to the input pins, it is possible that an internal input level may be generated due to noise, etc., hence causing malfunction. CMOS devices behave differently than Bipolar or NMOS devices. Input levels of CMOS devices must be fixed high or low by using a pull-up or pull-down circuitry. Each unused pin should be connected to VDD or GND with a resistor, if it is considered to have a possibility of being an output pin. The unused pins must be handled in accordance with the related specifications. STATUS BEFORE INITIALIZATION OF MOS DEVICES Pr Power-on does not necessarily define initial status of MOS devices. Production process of MOS does not define the initial operation status of the device. Immediately after the power source is turned ON, the MOS devices with reset function have not yet been initialized. Hence, power-on does not guarantee output pin levels, I/O settings or contents of registers. MOS devices are not initialized until the reset signal is received. Reset operation must be executed immediately after power-on for MOS devices having reset function. CME0107 t uc od Preliminary Data Sheet E0405E10 (Ver. 1.0) 33 EDD2508AMTA, EDD2516AMTA The information in this document is subject to change without notice. Before using this document, confirm that this is the latest version. No part of this document may be copied or reproduced in any form or by any means without the prior written consent of Elpida Memory, Inc. Elpida Memory, Inc. does not assume any liability for infringement of any intellectual property rights (including but not limited to patents, copyrights, and circuit layout licenses) of Elpida Memory, Inc. or third parties by or arising from the use of the products or information listed in this document. No license, express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of Elpida Memory, Inc. or others. Descriptions of circuits, software and other related information in this document are provided for illustrative purposes in semiconductor product operation and application examples. The incorporation of these circuits, software and information in the design of the customer's equipment shall be done under the full responsibility of the customer. Elpida Memory, Inc. assumes no responsibility for any losses incurred by customers or third parties arising from the use of these circuits, software and information. EO [Product applications] Elpida Memory, Inc. makes every attempt to ensure that its products are of high quality and reliability. However, users are instructed to contact Elpida Memory's sales office before using the product in aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment, medical equipment for life support, or other such application in which especially high quality and reliability is demanded or where its failure or malfunction may directly threaten human life or cause risk of bodily injury. L [Product usage] Design your application so that the product is used within the ranges and conditions guaranteed by Elpida Memory, Inc., including the maximum ratings, operating supply voltage range, heat radiation characteristics, installation conditions and other related characteristics. Elpida Memory, Inc. bears no responsibility for failure or damage when the product is used beyond the guaranteed ranges and conditions. Even within the guaranteed ranges and conditions, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as fail-safes, so that the equipment incorporating Elpida Memory, Inc. products does not cause bodily injury, fire or other consequential damage due to the operation of the Elpida Memory, Inc. product. [Usage environment] This product is not designed to be resistant to electromagnetic waves or radiation. This product must be used in a non-condensing environment. Pr If you export the products or technology described in this document that are controlled by the Foreign Exchange and Foreign Trade Law of Japan, you must follow the necessary procedures in accordance with the relevant laws and regulations of Japan. Also, if you export products/technology controlled by U.S. export control regulations, or another country's export control laws or regulations, you must follow the necessary procedures in accordance with such laws or regulations. If these products/technology are sold, leased, or transferred to a third party, or a third party is granted license to use these products, that third party must be made aware that they are responsible for compliance with the relevant laws and regulations. M01E0107 t uc od Preliminary Data Sheet E0405E10 (Ver. 1.0) 34