EtronTech EM6A9320BI Revision History Revision 0.9C(Mar., 2006) Deleted confidential wording Revision 0.9B(Mar., 2006) Revise the DC and AC characteristics Etron Technology, Inc. No. 6, Technology Rd. V, Science-Based Industrial Park, Hsinchu, Taiwan 30077, R.O.C. TEL: (886)-3-5782345 FAX: (886)-3-5778671 Etron Technology, Inc., reserves the right to make changes to its products and specifications without notice. EtronTech 4Mx32 DDR SDRAM EM6A9320BI 4M x 32 DDR SDRAM (Rev 0.9C May/2006) Features Overview • Fast clock rate: 250/200/166 MHz • Differential Clock CK & CK# input The EM6A9320 DDR SDRAM is a high-speed CMOS double data rate synchronous DRAM containing 128 Mbits. It is internally configured as a quad 1M x 32 DRAM with a synchronous interface (all signals are registered on the positive edge of the clock signal, CK). • 4 Bi-directional DQS. Data transactions on both edges of DQS (1DQS / Byte) • DLL aligns DQ and DQS transitions • Edge aligned data & DQS output Data outputs occur at both rising edges of CK and CK#. Read and write accesses to the SDRAM are burst oriented; accesses start at a selected location and continue for a programmed number of locations in a programmed sequence. • Center aligned data & DQS input • 4 internal banks, 1M x 32-bit for each bank • Programmable mode and extended mode registers Accesses begin with the registration of a BankActivate command, which is then followed by a Read or Write command. - CAS Latency: 2, 2.5, 3, 4 - Burst length: 2, 4, 8, and Full Page • Full page burst length for sequential type only • Start address of full page burst should be even The EM6A9320 provides programmable Read or Write burst lengths of 2, 4, 8 and full page. An auto precharge function may be enabled to provide a self-timed row precharge that is initiated at the end of the burst sequence. • All inputs except DQ’s & DM are at the positive edge of the system clock The refresh functions, either Auto or Self Refresh are easy to use. • No Write-Interrupted by Read function • 4 individual DM control for write masking only In addition, EM6A9320 features programmable DLL option. By having a programmable mode register and extended mode register, the system can choose the most suitable modes to maximize its performance. - Burst Type: Sequential & Interleave • Auto Refresh and Self Refresh • 4096 refresh cycles / 32ms • Power supplies : VDD = 2.5V ± 5% VDDQ = 2.5V ± 5% These devices are well suited for applications requiring high memory bandwidth, result in a device particularly well suited to high performance main memory and graphics applications. • Interface : SSTL_2 I/O compatible • Standard 144-ball FBGA package • Pb-free package is availiable Ordering Information Part Number EM6A9320BI-4M EM6A9320BI-4MG EM6A9320BI-5M EM6A9320BI-5MG EM6A9320BI-6M EM6A9320BI-6MG G : indicates Pb Free package. Frequency 250MHz 250MHz 200MHz 200MHz 166MHz 166MHz Power Supply Package FBGA FBGA VDD 2.5V FBGA VDDQ 2.5V FBGA FBGA FBGA EtronTech EM6A9320BI 4Mx32 DDR SDRAM Pin Assignment (FBGA 144Ball Top View) Note: VSS pins for thermal balls are optional 1 2 3 4 5 6 7 8 9 10 11 12 A DQS0 DM0 VSSQ DQ3 DQ2 DQ0 DQ31 DQ29 DQ28 VSSQ DM3 DQS3 B DQ4 VDDQ NC VDDQ DQ1 VDDQ VDDQ DQ30 VDDQ NC VDDQ DQ27 C DQ6 DQ5 VSSQ VSSQ VSSQ VDD VDD VSSQ VSSQ VSSQ DQ26 DQ25 D DQ7 VDDQ VDD VSS VSSQ VSS VSS VSSQ VSS VDD VDDQ DQ24 E DQ17 DQ16 VDDQ VSSQ VSS VSS VSS VSS VSSQ VDDQ DQ15 DQ14 F DQ19 DQ18 VDDQ VSSQ VSS VSS VSS VSS VSSQ VDDQ DQ13 DQ12 G DQS2 DM2 NC VSSQ VSS VSS VSS VSS VSSQ NC DM1 DQS1 H DQ21 DQ20 VDDQ VSSQ VSS VSS VSS VSS VSSQ VDDQ DQ11 DQ10 J DQ22 DQ23 VDDQ VSSQ VSS VSS VSS VSS VSSQ VDDQ DQ9 DQ8 K CAS# WE# VDD VSS A10 VDD VDD NC VSS VDD NC NC L RAS# NC NC BA1 A2 A11 A9 A5 NC CK CK# NC M CS# NC BA0 A0 A1 A3 A4 A6 A7 A8 CKE VREF Pin Assignment by Name (FBGA 144Ball) Symbol Location Symbol Location Symbol Location Symbol Location Symbol Location Symbol Location Symbol Location Symbol Location A0 M4 DQ6 C1 DQ24 D12 CK L10 VDDQ B6 VSS E5 VSS J7 VSSQ G4 A1 M5 DQ7 D1 DQ25 C12 CK# L11 VDDQ B7 VSS E6 VSS J8 VSSQ G9 A2 L5 DQ8 J12 DQ26 C11 CKE M11 VDDQ B9 VSS E7 VSS K4 VSSQ H4 A3 M6 DQ9 J11 DQ27 B12 CS# M1 VDDQ B11 VSS E8 VSS K9 VSSQ H9 A4 M7 DQ10 H12 DQ28 A9 RAS# L1 VDDQ D2 VSS F5 VSSQ A3 VSSQ J4 A5 L8 DQ11 H11 DQ29 A8 CAS# K1 VDDQ D11 VSS F6 VSSQ A10 VSSQ J9 A6 M8 DQ12 F12 DQ30 B8 WE# K2 VDDQ E3 VSS F7 VSSQ C3 NC B3 A7 M9 DQ13 F11 DQ31 A7 VREF M12 VDDQ E10 VSS F8 VSSQ C4 NC B10 A8/AP M10 DQ14 E12 DQS0 A1 VDD C6 VDDQ F3 VSS G5 VSSQ C5 NC G3 A9 L7 DQ15 E11 DQS1 G12 VDD C7 VDDQ F10 VSS G6 VSSQ C8 NC G10 A10 K5 DQ16 E2 DQS2 G1 VDD D3 VDDQ H3 VSS G7 VSSQ C9 NC K8 A11 L6 DQ17 E1 DQS3 A12 VDD D10 VDDQ H10 VSS G8 VSSQ C10 NC K11 DQ0 A6 DQ18 F2 DM0 A2 VDD K3 VDDQ J3 VSS H5 VSSQ D5 NC K12 DQ1 B5 DQ19 F1 DM1 G11 VDD K6 VDDQ J10 VSS H6 VSSQ D8 NC L2 DQ2 A5 DQ20 H2 DM2 G2 VDD K7 VSS D4 VSS H7 VSSQ E4 NC L3 DQ3 A4 DQ21 H1 DM3 A11 VDD K10 VSS D6 VSS H8 VSSQ E9 NC L9 DQ4 B1 DQ22 J1 BA0 M3 VDDQ B2 VSS D7 VSS J5 VSSQ F4 NC L12 DQ5 C2 DQ23 J2 BA1 L4 VDDQ B4 VSS D9 VSS J6 VSSQ F9 NC M2 3 Rev 0.9C May 2006 EtronTech 4Mx32 DDR SDRAM EM6A9320BI Block Diagram Row Decoder Column Decoder 4096 X 256 X 32 CELL ARRAY (BANK #0) Sense Amplifier DLL CLOCK BUFFER CK CK# CONTROL SIGNAL GENERATOR CKE CS# RAS# CAS# WE# Row Decoder Sense Amplifier COMMAND DECODER MODE REGISTER 4096 X 256 X 32 CELL ARRAY (BANK #1) Column Decoder COLUMN COUNTER A8/AP A0 Row Decoder Column Decoder ADDRESS BUFFER A10 A11 BA0 BA1 4096 X 256 X 32 CELL ARRAY (BANK #2) Sense Amplifier REFRESH COUNTER DQS0~3 Sense Amplifier Row Decoder DATA STROBE BUFFER DQ BUFFER DQ0 │ DQ31 4096 X 256 X 32 CELL ARRAY (BANK #3) Column Decoder DM0~3 4 Rev 0.9C May 2006 EtronTech 4Mx32 DDR SDRAM EM6A9320BI Pin Descriptions Table 1. Pin Details of EM6A9320 Symbol CK, CK# Type Input CKE Input BA0, BA1 Input A0-A11 Input CS# Input RAS# Input CAS# Input WE# Input DQS0-DQS3 Input / Output DM0 - DM3 Input DQ0 - DQ31 Input / Output Supply VDD Description Differential Clock: CK, CK# are driven by the system clock. All SDRAM input commands are sampled on the positive edge of CK. Both CK and CK# increment the internal burst counter and controls the output registers. Clock Enable: CKE activates (HIGH) and deactivates (LOW) the CK signal. If CKE goes low synchronously with clock, the internal clock is suspended from the next clock cycle and the state of output and burst address is frozen as long as the CKE remains low. When all banks are in the idle state, deactivating the clock controls the entry to the Power Down and Self Refresh modes. Bank Select: BA0 and BA1 defines to which bank the BankActivate, Read, Write, or BankPrecharge command is being applied. They also define which Mode Register or Extended Mode Register is loaded during a Mode Register Set command. Address Inputs: A0-A11 are sampled during the Bank Activate command (row address A0-A11) and Read/Write command (column address A0-A7 with A8 defining Auto Precharge) to select one location out of the 256K available in the respective bank. During a Precharge command, A8 is sampled to determine if all banks are to be precharged (A8 = HIGH). The address inputs also provide the op-code during a Mode Register Set or Extended Mode Register Set command. Chip Select: CS# enables (sampled LOW) and disables (sampled HIGH) the command decoder. All commands are masked when CS# is sampled HIGH. CS# provides for external bank selection on systems with multiple banks. It is considered part of the command code. Row Address Strobe: The RAS# signal defines the operation commands in conjunction with the CAS# and WE# signals and is latched at the positive edges of CK. When RAS# and CS# are asserted "LOW" and CAS# is asserted "HIGH" either the BankActivate command or the Precharge command is selected by the WE# signal. When the WE# is asserted "HIGH," the BankActivate command is selected and the bank designated by BS is turned on to the active state. When the WE# is asserted "LOW," the Precharge command is selected and the bank designated by BS is switched to the idle state after the precharge operation. Column Address Strobe: The CAS# signal defines the operation commands in conjunction with the RAS# and WE# signals and is latched at the positive edges of CK. When RAS# is held "HIGH" and CS# is asserted "LOW" the column access is started by asserting CAS# "LOW" Then, the Read or Write command is selected by asserting WE# "HIGH " or “LOW". Write Enable: The WE# signal defines the operation commands in conjunction with the RAS# and CAS# signals and is latched at the positive edges of CK. The WE# input is used to select the BankActivate or Precharge command and Read or Write command. Bidirectional Data Strobe: The DQSx signals are mapped to the following data bytes: DQS0 to DQ0-DQ7, DQS1 to DQ8-DQ15, DQS2 to DQ16-DQ23, DQS3 to DQ24-DQ31. Data Input Mask: DM0-DM3 are byte specific. Input data is masked when DM is sampled HIGH during a write cycle. DM3 masks DQ31-DQ24, DM2 masks DQ23DQ16, DM1 masks DQ15-DQ8, and DM0 masks DQ7-DQ0. Data I/O: The DQ0-DQ31 input and output data are synchronized with the positive edges of CK and CK#. The I/Os are byte-maskable during Writes. Power Supply: Power for the input buffers and core logic. 5 Rev 0.9C May 2006 EtronTech VSS 4Mx32 DDR SDRAM EM6A9320BI Supply Ground: Ground for the input buffers and core logic. Supply DQ Power: Provide isolated power to DQs for improved noise immunity. VDDQ Supply DQ Ground: Provide isolated ground to DQs for improved noise immunity. VSSQ Supply Reference Voltage for Inputs: +0.5 x VDDQ VREF NC No Connect: These pins should be left unconnected. Note: The timing reference point for the differential clocking is the cross point of the CK and CK#. For any applications using the single ended clocking, apply VREF to CK# pin. Operation Mode Fully synchronous operations are performed to latch the commands at the positive edges of CK. Table 2 shows the truth table for the operation commands. Table 2. Truth Table (Note (1), (2) ) Command BankActivate BankPrecharge PrechargeAll Write Write and AutoPrecharge Read Read and Autoprecharge Mode Register Set Extended Mode Register Set No-Operation Device Deselect Burst Stop AutoRefresh SelfRefresh Entry SelfRefresh Exit State CKEn-1 CKEn DM BA1 BA0 (3) Idle H X X V V Any H X X V V Any H X X X X Active(3) H X V V V (3) H X V V V Active (3) Active H X X V V Active(3) H X X V V Idle H X X L L Idle H X X L H Any H X X X X Any H X X X X Active(4) H X X X X Idle H H X X X Idle H L X X X Idle L H X X X (Self Refresh) Power Down Mode Entry Idle/Active(5) H L X X X A8 A11-A9, A7-0 CS# RAS# CAS# WE# Row Address L L H H L X L L H L H X L L H L L L H L L Column H L H L L Address L L H L H A0~A7 H L H L H L L L L OP code L L L L X X L H H H X X H X X X X X L H H L X X L L L H X X L L L H H X X X X X L H H H H X X X X X L H H H H X X X X X L H H H X X X X X X X X X X X X Any L H X X X (Power Down) Active H X L X X Data Write/Output Enable Active H X H X X Data Mask/Output Disable Note: 1. V = Valid data, X = Don't Care, L = Low level, H = High level 2. CKEn signal is input level when commands are provided. CKEn-1 signal is input level one clock cycle before the commands are provided. 3. These are states of bank designated by BA0, BA1signals. 4. Read burst stop with BST command for all burst types. 5. Power Down Mode can not enter in the burst operation. When this command is asserted in the burst cycle, device state is clock suspend mode. Power Down Mode Exit 6 Rev 0.9C May 2006 EtronTech EM6A9320BI 4Mx32 DDR SDRAM Mode Register Set (MRS) The mode register is divided into various fields depending on functionality. Burst Length Field (A2, A1, A0) • This field specifies the data length of column access and selects the Burst Length. Addressing Mode Select Field (A3) • The Addressing Mode can be Interleave Mode or Sequential Mode. Both Sequential Mode and Interleave Mode support burst length of 2, 4 and 8. Full page burst length is only for Sequential mode. CAS# Latency Field (A6, A5, A4) • This field specifies the number of clock cycles from the assertion of the Read command to the first read data. The minimum whole value of CAS# Latency depends on the frequency of CK. The minimum whole value satisfying the following formula must be programmed into this field. CAS# Latency X tCK tCAC(min) Test Mode field :A7; DLL Reset Mode field : A8 • These two bits must be programmed to "00" in normal operation. ( BA0, BA1) • ≦ Mode Resistor Bitmap BA1 0 BA0 A11 A10 A9 A8 Mode RFU must be set to “0” DLL(1) BA0 0 1 A6 0 0 1 1 1 A5 1 1 0 0 1 Register Mode MRS EMRS A8 0 1 0 A7 TM A6 A7 0 0 1 A5 A4 CAS Latency Mode Normal Reset DLL Test Mode A4 CAS Latency 0 2 clocks 1 3 clocks 0 4 clocks 1 Reserved 0 2.5 clocks All other Reserved A2 0 0 0 1 A3 BT A3 0 1 A1 0 1 1 1 A2 A1 A0 Burst Lenght Type Sequential Interleave A0 Burst Length 1 2 0 4 1 8 1 Full Page (Sequential) All other Reserved Burst Definition, Addressing Sequence of Sequential and Interleave Mode Burst Length 2 4 8 Note : Start Address A2 A1 A0 X X 0 X X 1 X 0 0 X 0 1 X 1 0 X 1 1 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 Sequential Interleave 0, 1 1, 0 0, 1, 2, 3 1, 2, 3, 0 2, 3, 0, 1 3, 0, 1, 2 0, 1, 2, 3, 4, 5, 6, 7 1, 2, 3, 4, 5, 6, 7, 0 2, 3, 4, 5, 6, 7, 0, 1 3, 4, 5, 6, 7, 0, 1, 2 4, 5, 6, 7, 0, 1, 2, 3 5, 6, 7, 0, 1, 2, 3, 4 6, 7, 0, 1, 2, 3, 4, 5 7, 0, 1, 2, 3, 4, 5, 6 0, 1 1, 0 0, 1, 2, 3 1, 0, 3, 2 2, 3, 0, 1 3, 2, 1, 0 0, 1, 2, 3, 4, 5, 6, 7 1, 0, 3, 2, 5, 4, 7, 6 2, 3, 0, 1, 6, 7, 4, 5 3, 2, 1, 0, 7, 6, 5, 4 4, 5, 6, 7, 0, 1, 2, 3 5, 4, 7, 6, 1, 0, 3, 2 6, 7, 4, 5, 2, 3, 0, 1 7, 6, 5, 4, 3, 2, 1, 0 1. DLL must be resetted whenever changing the operation frequency. 7 Rev 0.9C May 2006 EtronTech EM6A9320BI 4Mx32 DDR SDRAM Extended Mode Register Set (EMRS) The Extended Mode Register Set stores the data for enabling or disabling DLL and selecting output driver strength. The default value of the extended mode register is not defined, therefore must be written after power up for proper operation. The extended mode register is written by asserting low on CS#, RAS#, CAS#, and WE#. The state of A0, A2 ~ A5, A7 ~ A11and BA1 is written in the mode register in the same cycle as CS#, RAS#, CAS#, and WE# going low. The DDR SDRAM should be in all bank precharge with CKE already high prior to writing into the extended mode register. A1 and A6 are used for setting driver strength to normal, weak or matched impedance. Two clock cycles are required to complete the write operation in the extended mode register. The mode register contents can be changed using the same command and clock cycle requirements during operation as long as all banks are in the idle state. A0 is used for DLL enable or disable. "High" on BA0 is used for EMRS. Refer to the table for specific codes. Extended Mode Resistor Bitmap BA1 0 BA0 1 BA0 Mode 0 MRS 1 EMRS A11 A6 0 0 1 1 A10 A9 A8 RFU must be set to “0” A7 A6 DS1 A5 A4 A3 A2 RFU must be set to “0” A1 Drive Strength Strength Comment 0 Full 100% 1 SSTL-2 weak 60% 0 RFU RFU Do not use 1 Matched impedance 30% Output driver matches impedance A1 DS0 A0 DLL A0 DLL 0 Enable 1 Disable Power up Sequence Power up must be performed in the following sequence. 1) Apply power to VDD before or at the same time as VDDQ, VTT and VREF when all input signals are held "NOP" state and maintain CKE “LOW”. 2) Start clock and maintain stable condition for minimum 200us. 3) Issue a “NOP” command and keep CKE “HIGH” 4) Issue a “Precharge All” command. 5) Issue EMRS – enable DLL. 6) Issue MRS – reset DLL. (An additional 200 clock cycles are required to lock the DLL). 7) Precharge all banks of the device. 8) Issue two or more Auto Refresh commands. 9) Issue MRS – with A8 to low to initialize the mode register. 8 Rev 0.9C May 2006 EtronTech EM6A9320BI 4Mx32 DDR SDRAM Absolute Maximum Rating Symbol Item VIN, VOUT VDD, VDDQ TA TSTG TSOLDER PD IOUT Input, Output Voltage Power Supply Voltage Ambient Temperature Storage Temperature Soldering Temperature (10s) Power Dissipation Short Circuit Output Current Rating Leaded Pb-Free - 0.3 ~ VDDQ+0.3 -0.3 ~ 3.6 0~70 - 55~150 240 260 2.0 50 Unit V V °C °C °C W mA Note : Stress greater than those listed under "Absolute Maximum Ratings" may cause permanent damage of the device. Recommended D.C. Operating Conditions (SSTL_2 In/Out, TA = 0 ~ 70 °C) Symbol Parameter VDD Power Supply Voltage VDDQ Power Supply Voltage(for I/O ) Min. 2.375 Typ. 2.5 Max. 2.625 Unit V 2.375 2.5 2.625 V VREF VTT VIH(DC) VIL(DC) VOH Input Reference Voltage Termination Voltage Input High Voltage Input Low Voltage Output High Voltage 0.49 x VDDQ VREF – 0.04 VREF + 0.15 Vssq - 0.3 Vtt + 0.76 VREF - 0.51 x VDDQ VREF + 0.04 VDDQ + 0.3 VREF- 0.15 - V V V V V VOL IIL IOL Output Low Voltage Input Leakage Current Output Leakage Current -5 -5 - Vtt- 0.76 5 5 V uA uA Note IOH = -15.2 mA IOL = +15.2 mA Note : Under all conditions VDDQ must be less than or equal to VDD. Capacitance (VDD = 2.5V, f = 1MHz, TA = 25 °C) Parameter Input Capacitance (A0~A11, BA0, BA1) Input Capacitance (CK, CK#, CKE, CS#, RAS#, CAS#, WE#) DQ & DQS input/output capacitance DM0~DM3 input/output capacitance Symbol CIN1 CIN2 COUT CIN3 Min. 4 3 6 6 Max. 5 5 8 8 Unit pF pF pF pF Note: These parameters are periodically sampled and are not 100% tested. 9 Rev 0.9C May 2006 EtronTech EM6A9320BI 4Mx32 DDR SDRAM D.C. Characteristics (VDD=2.5V ± 5% TA = 0~70 °C) Parameter & Test Condition Symbol 4 5 Max 6 Unit OPERATING CURRENT : IDD0 220 210 200 mA One bank; Active-Precharge; tRC=tRC(min); tCK=tCK(min) OPERATING CURRENT : IDD1 260 240 240 mA One bank; Active-Read-Precharge; tRC≥tRC(min); tCK=tCK(min); lout=0mA; PRECHARGE POWER-DOWN STANDBY CURRENT: IDD2P 75 75 75 mA All banks idle; power-down mode; tCK=tCK(min); CKE=LOW IDLE STANDLY CURRENT : IDD2N 100 100 100 mA CKE = HIGH; CS#=HIGH(DESELECT); All banks idle; tCK=tCK(min) ACTIVE POWER-DOWN STANDBY CURRENT : IDD3P 75 75 75 mA One bank active; power-down mode; CKE=LOW; tCK=tCK(min) ACTIVE STANDBY CURRENT : IDD3N 230 220 220 mA CS#=HIGH;CKE=HIGH; one bank active ; tRC=tRC(max);tCK=tCK(min) OPERATING CURRENT BURST MODE : IDD4 440 420 400 mA tCK=tCK(min); lout=0mA AUTO REFRESH CURRENT : IDD5 330 300 300 mA tRC=tRFC(min); tCK=tCK(min) SELF REFRESH CURRENT: IDD6 6 6 6 mA Sell Refresh Mode ; CKE<=0.2V;tCK=tCK(min) BURST OPERATING CURRENT 4 bank operation: IDD7 600 570 550 mA Four bank interleaving; BL=4; tRC=tRC(min); tCK=tCK(min) Note: These parameters depend on the cycle rate and these values are measured by the cycle rate under the minimum value of tCK and tRC. 10 Rev 0.9C May 2006 EtronTech 4Mx32 DDR SDRAM EM6A9320BI Decoupling Capacitance Guide Line Symbol Parameter CDC1 Decouping Capacitance between VDD and VSS CDC2 Decouping Capacitance between VDDQ and VSSQ Value 0.1+0.01 0.1+0.01 Unit uF uF AC Input Operating Conditions (VDD=2.5 ± 5%, Ta = 0~70 °C) Symbol VIH VIL VID VIX Parameter Input High Voltage; DQ Input Low Voltage; DQ Clock Input Differential Voltage; Ck & CK# Clock Input Crossing Point Voltage; Ck & CK# Min VREF+0.4 0.8 0.5xVDDQ-0.2 Max VREF-0.4 VDDQ+0.6 0.5xVDDQ+0.2 Unit V V V V Note AC Operating Test Conditions (VDD=2.5 ± 5%, Ta = 0~70 °C) Reference Level of Output Signals (VRFE) CK & CK# signal maximum peak swing Output Load Input Signal Levels Input Signals Slew Rate Input timing measurement reference level Output timing measurement reference level Reference Level of Input Signals 0.5 x VDDQ 1.5V See Figure. A Test Load VREF+0.4 V / VREF-0.4 V 1 V/ns VREF VTT 0.5 x VDDQ Figure A. Test Load VTT=0.5 x VDDQ 50 Ω DQ,DQS Z0=50 W 30pF VREF=0.5 x VDDQ 11 Rev 0.9C May 2006 EtronTech EM6A9320BI 4Mx32 DDR SDRAM Electrical Characteristics and Recommended A.C. Operating Conditions (VDD = 2.5V ± 5%, Ta = 0~70 °C) Symbol 4 Parameter CL = 2 CL = 2.5 CL = 3 5 6 Min Max Min Max Min Max 4 10 75 6 5 10 10 10 75 6 6 12 12 12 tCK Clock cycle time tCH tCL tDQSCK tAC tDQSQ tRPRE tRPST tDQSS tWPRES tWPREH tWPST tDQSH tDQSL tIS tIH tDS tDH Clock high level width 0.45 0.55 0.45 0.55 0.45 0.55 Clock low level width 0.45 0.55 0.45 0.55 0.45 0.55 Unit ns - 0.5 - 0.5 - tCK tCK ns ns ns tCK tCK tCK ns tck tCK tCK tCK ns ns ns ns tCLMIN or tCHMIN - tCLMIN or tCHMIN - tCLMIN or tCHMIN - ns - 0.45 - 0.5 0.55 tHP - tQHS - tHP - tQHS - tHP - tQHS - Row cycle time 15 - 12 - 10 - Refresh row cycle time 17 - 14 - 12 - Row active time 10 100K 8 100K 7 100K RAS# to CAS# Delay in Read 5 - 4 - 3 - RAS# to CAS# Delay in Write 3 - 2 - 2 - Row precharge time 4 - 4 - 3 - Row active to Row active delay 3 - 2 - 2 - ns ns tCK tCK tCK tCK tCK tCK tCK tCK tCK tCK tCK tCK tCK ns us ps ps DQS-out access time from CK,CK# -0.7 0.7 -0.7 0.7 -0.7 0.7 Output access time from CK,CK# -0.7 0.7 -0.7 0.7 -0.7 0.7 DQS-DQ Skew - 0.4 - 0.4 - 0.45 Read preamble 0.9 1.1 0.9 1.1 0.9 1.1 Read postamble 0.4 0.6 0.4 0.6 0.4 0.6 CK to valid DQS-in 0.85 1.15 0.8 1.2 0.75 1.25 DQS-in setup time 0 - 0 - 0 - DQS-in hold time 0.35 - 0.25 - 0.25 - DQS write postamble 0.4 0.6 0.4 0.6 0.4 0.6 DQS in high level pulse width 0.4 0.6 0.4 0.6 0.4 0.6 DQS in low level pulse width 0.4 0.6 0.4 0.6 0.4 0.6 Address and Control input setup time 0.9 - 1.0 - 1.0 - Address and Control input hold time 0.9 - 1.0 - 1.0 - DQ & DM setup time to DQS 0.45 - 0.5 - 0.5 - 0.45 DQ & DM hold time to DQS tHP Clock half period tQHS tQH tRC tRFC tRAS tRCDRD tRCDWR tRP tRRD twR tCDLR tCCD tMRD tDAL tXSA tPDEX tREF tJ tR, tF Data hold skew factor Output DQS valid window Write recovery time 3 - 2 - 2 - Last data in to Read command 2 - 2 - 2 - Col. Address to Col. Address delay 1 - 1 - 1 - Mode register set cycle time 2 - 2 - 2 - Auto precharge write recovery + Precharge Self refresh exit to read command delay 7 - 6 - 6 - 200 - 200 - 200 - Power down exit time tIS + 2tCK - tIS + 2tCK - tIS + 2tCK - Refresh interval time - 7.8 - 7.8 - 7.8 Short term jitter - 100 - 105 - 105 CLK Rise time, Fall time - 700 - 700 - 700 12 Rev 0.9C May 2006 EtronTech EM6A9320BI 4Mx32 DDR SDRAM Timing Waveforms Figure 1. AC Parameters for Read Timimg (Burst Length = 4) 0 tCH tCK CK# 1 tCL tHP 2 tHP 3 4 5 6 7 8 tIS CK tIH RD CMD tIS tIH A0-11, BA0-1 Valid “Preamble” tRPRE CAS Latency = 4 DQS “Postmble” tRPST tDQSCK tAC tQHS DQ DQ0 DQ1 DQ2 tDQSQ CAS Latency = 3 “Postmble” “Preamble” DQS DQ3 tQH DQ DQ0 DQ1 DQ2 DQ3 CAS Latency = 2.5 “Preamble” DQS “Postmble” DQ DQ0 DQ1 DQ2 DQ3 CAS Latency = 2 “Postmble” “Preamble” DQS DQ DQ0 DQ1 DQ2 DQ3 Figure 2. AC Parameters for Write Timing (Burst Length=4) 0 CK# 1 2 3 4 5 6 7 8 CK CMD A0-11, BA0-1 WR WR WR Valid Valid Valid “Preamble” DQS “Postmble” tWPRES tWPREH “Postmble” “Preamble” tWPST tDQSS tWPST tDQSS tDH DM tDH tDS tDS Input Data Masked tDS DQ tDH DQ0 DQ1 DQ2 DQ0 DQ3 13 DQ1 DQ2 DQ3 DQ4 DQ5 Rev 0.9C DQ6 DQ7 May 2006 EtronTech EM6A9320BI 4Mx32 DDR SDRAM Figure 3. Bank Activate Read or Write Command Timing CK tRCDRD tRCDWR tRAS tRP tRAS tRC CMD ACT RD PRE ROW ADR Active A0-11 RA ROW ADR BA0-1 BA tRP tRRD tRC ACT ACT WR RA RA CA BA BA BA PRE ACT Percharge CA RA Column ADR BA BA BA BA Bank ADR Figure 4. Burst Stop for Read (CAS Letancy = 3, Burst Length = 4) 0 CK# 1 2 3 4 5 6 7 8 CK CMD RD BST CMD Burst Stop for CAS Latency = 3 A0-11, BA0-1 Valid 1x CK After 1 x CK Command can be active DQS DQ DQ0 DQ1 Figure 5. Read with Auto Precharge (CAS Letancy = 3, Burst Length = 4) 0 CK# 1 2 3 4 5 6 CK Read with Auto Precharge CMD Bank can be Active after Auto Precharge ACT RDA CAS Latency = 3 A0-11, BA0-1 Valid Valid tRP DQS Begin of Auto Precharge DQ DQ0 14 DQ1 DQ2 DQ3 Rev 0.9C May 2006 EtronTech EM6A9320BI 4Mx32 DDR SDRAM Figure 6. Write with Auto Precharge (Burst Length = 4) CK# 0 1 2 3 4 5 6 CK Write with Auto Precharge Bank can be Active after Auto Precharge CMD WRA ACT A0-11, BA0-1 Valid Valid tWR DQS tRP Begin of Auto Precharge DQ0 DQ DQ1 DQ2 DQ3 Figure 7. Read Burst Interrupt by Read (CAS Letancy = 3, Burst Length = 4) CK# 0 1 2 3 4 5 6 7 8 CK tCCD CMD RDa RDb A0-11, BA0-1 Valid Valid DQS DQ Da0 Da1 Db0 Db1 Db2 Db3 Figure 8. Write Interrupted by Write (Burst Length = 4) CK# 0 1 2 3 4 CK tCCD CMD WRa WRb A0-11, BA0-1 Valid Valid DQS DQ Da0 Da1 Db0 Db1 Db2 Db3 Figure 9. Auto Refresh Timimg CK tRP CMD PRE Precharge tRFC AFRF CMD Auto Refresh E it 15 Rev 0.9C May 2006 EtronTech EM6A9320BI 4Mx32 DDR SDRAM Figure 10. Self Refresh Timimg CK 200xCK tSREX SREF CMD SREX NOP CMD CKE Self Refresh Entry Self Refresh Exit After 200 x CK, Command can be active Figure 11. Precharge Command CK tRAS tRP tRC CMD ACT A0-11 RA BA0-1 BA PRE ACT RA BA BA Figure 12. Power Up Sequence CK 200uS CMD NOP tRP NOP PREA Power Up wait 200uS Precharge All tMRD 200xCK EMRS MRS EMRS set MRS set Reset DLL with A8=H tRP PREA Precharge All tRFC AREF AREF 2 or more Auto Refresh MRS MRS set with A8=L Figure 13. Mode Register Set Timing CK tRP CMD PREA 1xCK MRS Precharge All MRS set tMRD CMD After 1 x CK, Command can be active Figure 14. Power Down Mode CK CMD PRE NOP NOP NOP CMD tPDEX CKE Power Down Mode Entry Power Down Mode Exit 16 Rev 0.9C May 2006 EtronTech EM6A9320BI 4Mx32 DDR SDRAM BOTTOM VIEW TOP VIEW C 0.15 S C PIN A1 CORNER A B 0.40~0.50 (144X) PIN A1 CORNER 1 2 3 4 5 6 0.08 S 12 11 10 9 8 7 6 5 4 3 2 1 7 8 9 10 11 12 L L 0.80 -A- 8.80 1.60 0.20 C -B0.15 (4x) C \\ Ball pitch : 0.80 0.15 C -C- Ball Diam eter : 0.45 SEATING PLANE 17 Rev 0.9C May 2006