HIGH-SPEED 2.5V 512K x 36 SYNCHRONOUS DUAL-PORT STATIC RAM WITH 3.3V OR 2.5V INTERFACE Features: ◆ ◆ ◆ ◆ ◆ ◆ ◆ True Dual-Port memory cells which allow simultaneous access of the same memory location High-speed data access – Commercial: 3.6ns (166MHz)/4.2ns (133MHz)(max.) – Industrial: 4.2ns (133MHz) (max.) Selectable Pipelined or Flow-Through output mode Counter enable and repeat features Dual chip enables allow for depth expansion without additional logic Interrupt and Collision Detection Flags Full synchronous operation on both ports – 6ns cycle time, 166MHz operation (12Gbps bandwidth) – Fast 3.6ns clock to data out – 1.5ns setup to clock and 0.5ns hold on all control, data, and address inputs @ 166MHz PRELIMINARY IDT70T3539M – Data input, address, byte enable and control registers – Self-timed write allows fast cycle time Separate byte controls for multiplexed bus and bus matching compatibility Dual Cycle Deselect (DCD) for Pipelined Output Mode 2.5V (±100mV) power supply for core LVTTL compatible, selectable 3.3V (±150mV) or 2.5V (±100mV) power supply for I/Os and control signals on each port Includes JTAG functionality Industrial temperature range (-40°C to +85°C) is available at 133MHz Available in a 256-pin Ball Grid Array (BGA) ◆ ◆ ◆ ◆ ◆ ◆ ◆ Functional Block Diagram BE3L BE3R BE2L BE2R BE1L BE1R BE0L BE0R FT/PIPEL 1/0 0a 1a 0b 1b 0c 1c 0d 1d 1d 0d 1c 0c 1b 0b 1a 0a a b c d d c b a FT/PIPER 1/0 R/WL R/WR CE0L CE1L 1 1 0 0 B B B B B B B B W W WWW W WW 0 1 2 3 3 2 1 0 L L L L R R R R 1/0 OEL Dout0-8_L Dout9-17_L Dout18-26_L Dout27-35_L 1/0 OER Dout0-8_R Dout9-17_R Dout18-26_R Dout27-35_R 1d 0d 1c 0c 1b 0b 1a 0a FT/PIPEL CE0R CE1R , 0a 1a 0b 1b 0c 1c 0d 1d 0/1 FT/PIPER 0/1 a bc d d cba 512K x 36 MEMORY ARRAY I/O0L - I/O35L Din_L I/O0R - I/O35R Din_R CLKR CLKL A0L REPEATL ADSL CNTENL , A18R A18L Counter/ Address Reg. Counter/ Address Reg. ADDR_R ADDR_L TDI INTERRUPT COLLISION DE TE CTION LOGIC CE 0 L CE1 L R/W L A0R REPEATR ADSR CNTENR CE0 R CE1 R JTAG TDO TCK TMS TRST R /W R COL L INTL COLR INTR (1) ZZL ZZ CONTROL LOGIC ZZR (1) NOTE: 1. The sleep mode pin shuts off all dynamic inputs, except JTAG inputs, when asserted. All static inputs, i.e., PL/FTx and OPTx and the sleep mode pins themselves (ZZx) are not affected during sleep mode. 5678 drw 01 APRIL 2004 1 ©2004 Integrated Device Technology, Inc. DSC 5678/5 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Description: The IDT70T3539M is a high-speed 512K x 36 bit synchronous DualPort RAM. The memory array utilizes Dual-Port memory cells to allow simultaneous access of any address from both ports. Registers on control, data, and address inputs provide minimal setup and hold times. The timing latitude provided by this approach allows systems to be designed with very short cycle times. With an input data register, the IDT70T3539M has been optimized for applications having unidirectional or bidirectional data flow Preliminary Industrial and Commercial Temperature Ranges in bursts. An automatic power down feature, controlled by CE0 and CE1, permits the on-chip circuitry of each port to enter a very low standby power mode. The 70T3539M can support an operating voltage of either 3.3V or 2.5V on one or both ports, controllable by the OPT pins. The power supply for the core of the device (VDD) is at 2.5V. 6.42 2 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Pin Configuration (1,2,3,4) 70T3539M BC BC-256(5) 256-Pin BGA Top View(6) 10/07/03 A1 NC B1 I/O18L C1 A2 TDI B2 NC C2 A3 NC B3 TDO C3 I/O18R I/O19L V SS D1 D2 D3 A4 A17L B4 A18L C4 A16L D4 A5 A6 A14L A 11L B5 B6 A15L C5 A13L D5 A12L C6 A10L D6 A7 A8L B7 A9L C7 A7L D7 A9 A8 BE2L CE1L B9 B8 BE3L C8 A10 A11 B10 B11 CE0L R/WL REPEATL C9 C10 C11 BE1L BE0L CLKL ADSL D9 D8 A12 OEL CNTEN L A5L D10 D11 B12 A4L C12 A6L D12 A13 A2L B13 A1L C13 A3L D13 A14 A0L B14 VDD C14 A15 NC B15 I/O17L C15 A16 NC B16 NC C16 OPTL I/O17R I/O16L D14 D15 D16 I/O20R I/O19R I/O20L PIPE/FTL VDDQL VDDQL VDDQR VDDQR VDDQL VDDQL VDDQR VDDQR VDD I/O15R I/O15L I/O16R E1 E2 E3 E4 E5 I/O21R I/O21L I/O22L VDDQL VDD F1 F2 F3 F4 F5 I/O23L I/O22R I/O23R VDDQL VDD G1 G2 G3 G4 G5 I/O24R I/O24L I/O25L VDDQR VSS H1 H2 H3 H4 H5 I/O26L I/O25R I/O26R VDDQR VSS J1 J2 J3 J4 J5 I/O27L I/O28R I/O27R VDDQL ZZR K1 K2 K3 K4 K5 I/O29R I/O29L I/O28L VDDQL VSS L1 L2 L3 L4 L5 I/O30L I/O31R I/O30R VDDQR VDD M1 M2 M3 M4 I/O32R I/O32L I/O31L VDDQR N1 N2 N3 N4 M5 VDD N5 E6 VDD E7 INTL F7 F6 NC G6 VSS H6 VSS J6 VSS K6 VSS L6 NC M6 VDD N6 COLL G7 VSS H7 VSS J7 VSS K7 VSS L7 E8 E9 VSS F9 F8 VSS G8 INTR N7 H8 VSS H9 VSS J8 VSS J9 VSS K8 VSS K9 VSS L8 VSS L9 M8 VSS M9 VSS N8 VSS G9 VSS COLR VSS M7 VSS VSS N9 E10 VSS F10 VSS G10 VSS H10 VSS J10 VSS K10 VSS L10 VSS M10 VSS N10 E11 VDD F11 VSS G11 VSS H11 VSS J11 VSS K11 VSS L11 VSS M11 VDD N11 E12 F12 P2 P3 I/O35R I/O34L TMS R1 I/O35L T1 NC R2 NC T2 TCK R3 P4 A16R R4 TRST A18R T3 NC T4 A17R P5 A13R R5 A15R T5 A14R P6 A10R R6 A12R T6 A11R P7 A7R R7 A9R T7 A8R P8 P9 P10 P11 BE1R BE0R CLKR ADSR R8 R9 R10 R11 G12 VSS H12 VSS J12 T9 T10 T11 E15 E16 F13 F14 F15 F16 G13 G14 G15 G16 VDDQL I/O10L I/O11L I/O11R H13 H14 VDDQL I/O 9R J13 J14 H15 H16 IO9L I/O10R J15 J16 ZZL VDDQR I/O8R I/O7R I/O8L K12 VSS L12 VDD M12 K13 K14 K15 K16 VDDQR I/O 6R I/O6L I/O7L L13 L14 L15 L16 VDDQL I/O 5L I/O4R I/O5R M13 M14 M15 M16 VDD VDDQL I/O 3R I/O3L I/O4L N12 P12 A6R R12 BE3R CE0R R/WR REPEAT R A4R T8 E14 VDD VDDQR I/O12R I/O13R I/O12L I/O33L I/O34R I/O 33R P IP E / FTR V DDQR VDDQR VDDQL VDDQL V DDQR VDDQR VDDQL VDDQL P1 E13 VDD VDDQR I/O13L I/O14L I/O14R T12 BE2R CE1R OER CNTENR A5R N13 VDD P13 A3R R13 A1R T13 A2R N14 N15 N16 I/O 2L I/O1R I/O2R P14 P15 I/O0L I/O0R R14 OPTR T14 A0R R15 NC T15 NC P16 I/O1L R16 NC T16 NC 5678 drw 02d NOTES: 1. All VDD pins must be connected to 2.5V power supply. 2. All VDDQ pins must be connected to appropriate power supply: 3.3V if OPT pin for that port is set to VDD (2.5V), and 2.5V if OPT pin for that port is set to VSS (0V). 3. All VSS pins must be connected to ground supply. 4. Package body is approximately 17mm x 17mm x 1.4mm, with 1.0mm ball-pitch. 5. This package code is used to reference the package diagram. 6. This text does not indicate orientation of the actual part-marking. 6.42 3 , , IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Pin Names Left Port Right Port Names CE0L, CE1L CE0R, CE1R Chip Enables (Input)(5) R/WL R/WR Read/Write Enable (Input) OEL OER Output Enable (Input) A0L - A18L A0R - A18R Address (Input) I/O0L - I/O35L I/O0R - I/O35R Data Input/Output CLKL CLKR Clock (Input) PL/FTL PL/FTR Pipeline/Flow-Through (Input) ADSL ADSR Address Strobe Enable (Input) CNTENL CNTENR Counter Enable (Input) REPEATL REPEATR Counter Repeat(3) BE0L - BE3L BE0R - BE3R Byte Enables (9-bit bytes) (Input)(5) VDDQL VDDQR Power (I/O Bus) (3.3V or 2.5V)(1) (Input) OPTL OPTR Option for selecting V DDQX(1,2) (Input) ZZL ZZR Sleep Mode pin(4) (Input) VDD Power (2.5V)(1) (Input) VSS Ground (0V) (Input) TDI Test Data Input TDO Test Data Output TCK Test Logic Clock (10MHz) (Input) TMS Test Mode Select (Input) Reset (Initialize TAP Controller) (Input) TRST INTL INTR Interrupt Flag (Output) COLL COLR Collision Alert (Output) 5678 tbl 01 NOTES: 1. VDD, OPTX, and VDDQX must be set to appropriate operating levels prior to applying inputs on the I/Os and controls for that port. 2. OPTX selects the operating voltage levels for the I/Os and controls on that port. If OPTX is set to VDD (2.5V), then that port's I/Os and controls will operate at 3.3V levels and VDDQX must be supplied at 3.3V. If OPT X is set to VSS (0V), then that port's I/Os and address controls will operate at 2.5V levels and VDDQX must be supplied at 2.5V. The OPT pins are independent of one another—both ports can operate at 3.3V levels, both can operate at 2.5V levels, or either can operate at 3.3V with the other at 2.5V. 3. When REPEATX is asserted, the counter will reset to the last valid address loaded via ADS X. 4. The sleep mode pin shuts off all dynamic inputs, except JTAG inputs, when asserted. All static inputs, i.e., PL/FTx and OPTx and the sleep mode pins themselves (ZZx) are not affected during sleep mode. It is recommended that boundry scan not be operated during sleep mode. 5. Chip Enables and Byte Enables are double buffered when PL/FT = VIH, i.e., the signals take two cycles to deselect. 6.42 4 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Truth Table I—Read/Write and Enable Control (1,2,3,4) OE CLK CE0 CE 1 BE3 BE2 BE1 BE0 R/W ZZ Byte 3 I/O27-35 Byte 2 I/O18-26 Byte 1 I/O9-17 Byte 0 I/O0-8 X ↑ H X X X X X X L High-Z High-Z High-Z High-Z Deselected–Power Down X ↑ X L X X X X X L High-Z High-Z High-Z High-Z Deselected–Power Down X ↑ L H H H H H X L High-Z High-Z High-Z High-Z All Bytes Deselected MODE X ↑ L H H H H L L L High-Z High-Z High-Z DIN Write to Byte 0 Only X ↑ L H H H L H L L High-Z High-Z DIN High-Z Write to Byte 1 Only X ↑ L H H L H H L L High-Z DIN High-Z High-Z Write to Byte 2 Only X ↑ L H L H H H L L DIN High-Z High-Z High-Z Write to Byte 3 Only X ↑ L H H H L L L L High-Z High-Z DIN DIN Write to Lower 2 Bytes Only X ↑ L H L L H H L L DIN DIN High-Z High-Z Write to Upper 2 bytes Only X ↑ L H L L L L L L DIN DIN DIN DIN Write to All Bytes L ↑ L H H H H L H L High-Z High-Z High-Z DOUT Read Byte 0 Only L ↑ L H H H L H H L High-Z High-Z DOUT High-Z Read Byte 1 Only L ↑ L H H L H H H L High-Z DOUT High-Z High-Z Read Byte 2 Only L ↑ L H L H H H H L DOUT High-Z High-Z High-Z Read Byte 3 Only L ↑ L H H H L L H L High-Z High-Z DOUT DOUT Read Lower 2 Bytes Only L ↑ L H L L H H H L DOUT DOUT High-Z High-Z Read Upper 2 Bytes Only L ↑ L H L L L L H L DOUT DOUT DOUT DOUT H ↑ X X X X X X X L High-Z High-Z High-Z High-Z Outputs Disabled X X X X X X X X X H High-Z High-Z High-Z High-Z Sleep Mode Read All Bytes NOTES: 1. "H" = V IH, "L" = VIL, "X" = Don't Care. 2. ADS, CNTEN, REPEAT = VIH. 3. OE and ZZ are asynchronous input signals. 4. It is possible to read or write any combination of bytes during a given access. A few representative samples have been illustrated here. Truth Table II—Address Counter Control Address Previous Internal Address Internal Address Used CLK An X An ↑ ADS L(4) CNTEN REPEAT(6) I/O(3) X H DI/O (n) H DI/O(n+1) X An An + 1 ↑ X An + 1 An + 1 ↑ H H H DI/O(n+1) X X An ↑ X X L(4) DI/O(n) H (5) L 5678 tbl 02 (1,2) MODE External Address Used Counter Enabled—Internal Address generation External Address Blocked—Counter disabled (An + 1 reused) Counter Set to last valid ADS load 5678 tbl 03 NOTES: 1. "H" = V IH, "L" = VIL, "X" = Don't Care. 2. Read and write operations are controlled by the appropriate setting of R/W, CE 0, CE1, BEn and OE. 3. Outputs configured in flow-through output mode: if outputs are in pipelined mode the data out will be delayed by one cycle. 4. ADS and REPEAT are independent of all other memory control signals including CE0, CE1 and BEn 5. The address counter advances if CNTEN = VIL on the rising edge of CLK, regardless of all other memory control signals including CE0, CE1, BEn. 6. When REPEAT is asserted, the counter will reset to the last valid address loaded via ADS. This value is not set at power-up: a known location should be loaded via ADS during initialization if desired. Any subsequent ADS access during operations will update the REPEAT address location. 6.42 5 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Recommended Operating Grade Commercial Industrial Ambient Temperature GND VDD 0OC to +70OC 0V 2.5V + 100mV -40OC to +85OC 0V 2.5V + 100mV NOTES: 1. This is the parameter TA. This is the "instant on" case temperature. 5678 tbl 04 Recommended DC Operating Conditions with VDDQ at 2.5V Symbol Parameter Min. Typ. Max. Unit VDD Core Supply Voltage 2.4 2.5 2.6 V VDDQ I/O Supply Voltage (3) 2.4 2.5 2.6 V VSS Ground 0 0 0 V VIH Input High Volltage (Address, Control & Data I/O Inputs)(3) 1.7 ____ VDDQ + 100mV(2) V VIH Input High Voltage JTAG 1.7 ____ VDD + 100mV(2) V VIH Input High Voltage ZZ, OPT, PIPE/FT VDD - 0.2V ____ VDD + 100mV(2) V VIL Input Low Voltage -0.3(1) ____ 0.7 V VIL Input Low Voltage ZZ, OPT, PIPE/FT -0.3(1) ____ 0.2 V _ 5678 tbl 05a NOTES: 1. VIL (min.) = -1.0V for pulse width less than tCYC /2 or 5ns, whichever is less. 2. VIH (max.) = VDDQ + 1.0V for pulse width less than tCYC /2 or 5ns, whichever is less. 3. To select operation at 2.5V levels on the I/Os and controls of a given port, the OPT pin for that port must be set to Vss(0V), and V DDQX for that port must be supplied as indicated above. Recommended DC Operating Conditions with VDDQ at 3.3V Symbol VDD VDDQ Parameter Core Supply Voltage I/O Supply Voltage (3) Min. Typ. Max. Unit 2.4 2.5 2.6 V 3.15 3.3 3.45 V 0 0 0 V 2.0 ____ VDDQ + 150mV(2) V 1.7 ____ VDD + 100mV(2) V VDD - 0.2V ____ VDD + 100mV(2) V VSS Ground VIH Input High Voltage (Address, Control &Data I/O Inputs)(3) VIH Input High Voltage JTAG VIH Input High Voltage ZZ, OPT, PIPE/FT VIL Input Low Voltage -0.3(1) ____ 0.8 V VIL Input Low Voltage ZZ, OPT, PIPE/FT -0.3(1) ____ 0.2 V _ 5678 tbl 05b NOTES: 1. VIL (min.) = -1.0V for pulse width less than tCYC/2, or 5ns, whichever is less. 2. VIH (max.) = V DDQ + 1.0V for pulse width less than tCYC /2 or 5ns, whichever is less. 3. To select operation at 3.3V levels on the I/Os and controls of a given port, the OPT pin for that port must be set to VDD (2.5V), and VDDQX for that port must be supplied as indicated above. 6.42 6 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Absolute Maximum Ratings (1) Symbol Rating Commercial & Industrial Unit VTERM (VDD) V DD Terminal Voltage with Respect to GND -0.5 to 3.6 VTERM(2) (VDDQ) V DDQ Terminal Voltage with Respect to GND -0.3 to V DDQ + 0.3 V VTERM(2) (INPUTS and I/O's) Input and I/O Terminal Voltage with Respect to GND -0.3 to V DDQ + 0.3 V TBIAS(3) Temperature Under Bias -55 to +125 o C TSTG Storage Temperature -65 to +150 o C TJN Junction Temperature +150 o C IOUT(For V DDQ = 3.3V) DC Output Current 50 IOUT(For V DDQ = 2.5V) DC Output Current 40 V mA mA 5678 tbl 06 NOTES: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. This is a steady-state DC parameter that applies after the power supply has reached its nominal operating value. Power sequencing is not necessary; however, the voltage on any Input or I/O pin cannot exceed VDDQ during power supply ramp up. 3. Ambient Temperature under DC Bias. No AC Conditions. Chip Deselected. Capacitance (1) (TA = +25°C, F = 1.0MHZ) PQFP ONLY Symbol Parameter Input Capacitance CIN (3) COUT Output Capacitance Conditions(2) Max. Unit VIN = 3dV 15 pF VOUT = 3dV 10.5 pF 5678 tbl 07 NOTES: 1. These parameters are determined by device characterization, but are not production tested. 2. 3dV references the interpolated capacitance when the input and output switch from 0V to 3V or from 3V to 0V. 3. COUT also references CI/O. DC Electrical Characteristics Over the Operating Temperature and Supply Voltage Range (VDD = 2.5V ± 100mV) 70T3539MS Symbol |ILI| |ILI| |ILO| VOL (3.3V) Parameter Test Conditions Input Leakage Current(1) (1,2) JTAG & ZZ Input Leakage Current (1,3) Output Leakage Current Output Low Voltage (1) (1) Min. Max. Unit VDDQ = Max., VIN = 0V to VDDQ ___ 10 µA VDD = Max., V IN = 0V to VDD ___ ±30 µA CE0 = VIH or CE1 = VIL, VOUT = 0V to VDDQ ___ 10 µA IOL = +4mA, VDDQ = Min. ___ 0.4 V V V VOH (3.3V) Output High Voltage IOH = -4mA, V DDQ = Min. 2.4 ___ VOL (2.5V) Output Low Voltage (1) IOL = +2mA, VDDQ = Min. ___ 0.4 VOH (2.5V) Output High Voltage (1) IOH = -2mA, V DDQ = Min. 2.0 ___ V 5678 tbl 08 NOTES: 1. VDDQ is selectable (3.3V/2.5V) via OPT pins. Refer to p.5 for details. 2. Applicable only for TMS, TDI and TRST inputs. 3. Outputs tested in tri-state mode. 6.42 7 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges DC Electrical Characteristics Over the Operating Temperature and Supply Voltage Range (3) (VDD = 2.5V ± 100mV) Symbol IDD ISB1(6) ISB2(6) ISB3 ISB4(6) Izz Parameter Test Condition Version 70T3539MS166 Com'l Only 70T3539MS133 Com'l & Ind Typ.(4) Max. Typ. (4) Max. Dynamic Operating Current (Both Ports Active) CEL and CER= VIL, Outputs Disabled, f = fMAX(1) COM'L S 640 900 520 740 IND S ___ ___ 520 900 Standby Current (Both Ports - TTL Level Inputs) CEL = CER = VIH f = fMAX(1) COM'L S 350 460 280 380 IND S ___ ___ 280 470 Standby Current (One Port - TTL Level Inputs) CE"A" = VIL and CE"B" = VIH(5) Active Port Outputs Disabled, f=fMAX(1) COM'L S 500 650 400 500 IND S ___ ___ 400 620 Full Standby Current (Both Ports - CMOS Level Inputs) Both Ports CEL and CER > VDDQ - 0.2V, VIN > VDDQ - 0.2V or VIN < 0.2V, f = 0(2) COM'L S 12 20 12 20 IND S ___ ___ 12 25 Full Standby Current (One Port - CMOS Level Inputs) CE"A" < 0.2V and CE"B" > VDDQ - 0.2V(5) VIN > VDDQ - 0.2V or VIN < 0.2V Active Port, Outputs Disabled, f = fMAX(1) COM'L S 500 650 400 500 IND S ___ ___ 400 620 Sleep Mode Current (Both Ports - TTL Level Inputs) ZZL = ZZR = VIH f=fMAX(1) COM'L S 12 20 12 20 IND S ___ ___ 12 25 Unit mA mA mA mA mA mA 5678 tbl 09 NOTES: 1. At f = fMAX, address and control lines (except Output Enable) are cycling at the maximum frequency clock cycle of 1/tCYC , using "AC TEST CONDITIONS". 2. f = 0 means no address, clock, or control lines change. Applies only to input at CMOS level standby. 3. Port "A" may be either left or right port. Port "B" is the opposite from port "A". 4. VDD = 2.5V, TA = 25°C for Typ, and are not production tested. I DD DC(f=0) = 30mA (Typ). 5. CEX = VIL means CE0X = VIL and CE1X = VIH CEX = VIH means CE0X = VIH or CE1X = V IL CEX < 0.2V means CE0X < 0.2V and CE1X > VDD - 0.2V CEX > VDD - 0.2V means CE0X > VDD - 0.2V or CE1X - 0.2V "X" represents "L" for left port or "R" for right port. 6. ISB1, I SB2 and ISB4 will all reach full standby levels (ISB3) on the appropriate port(s) if ZZL and/or ZZR = VIH. 6.42 8 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges AC Test Conditions (VDDQ - 3.3V/2.5V) Input Pulse Levels (Address & Controls) GND to 3.0V/GND to 2.4V Input Pulse Levels (I/Os) GND to 3.0V/GND to 2.4V Input Rise/Fall Times 2ns Input Timing Reference Levels 1.5V/1.25V Output Reference Levels 1.5V/1.25V Output Load Figure 1 5678 tbl 10 50Ω 50Ω DATAOUT 1.5V/1.25 10pF (Tester) 5678 drw 03 Figure 1. AC Output Test load. ∆ tCD (Typical, ns) ∆ Capacitance (pF) from AC Test Load 6.42 9 5678 drw 04 , IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges AC Electrical Characteristics Over the Operating Temperature Range (Read and Write Cycle Timing) (2,3) (VDD = 2.5V ± 100mV, TA = 0°C to +70°C) 70T3539MS166 Com'l Only Symbol Parameter (1) 70T3539MS133 Com'l & Ind Min. Max. Min. Max. Unit ns tCYC1 Clock Cycle Time (Flow-Through) 20 ____ 25 ____ tCYC2 Clock Cycle Time (Pipelined)(1) 6 ____ 7.5 ____ ns tCH1 Clock High Time (Flow-Through)(1) 8 ____ 10 ____ ns ns (1) tCL1 Clock Low Time (Flow-Through) 8 ____ 10 ____ tCH2 Clock High Time (Pipelined)(2) 2.4 ____ 3 ____ ns tCL2 Clock Low Time (Pipelined)(1) 2.4 ____ 3 ____ ns tSA Address Setup Time 1.7 ____ 1.8 ____ ns tHA Address Hold Time 0.5 ____ 0.5 ____ ns tSC Chip Enable Setup Time 1.7 ____ 1.8 ____ ns tHC Chip Enable Hold Time 0.5 ____ 0.5 ____ ns tSB Byte Enable Setup Time 1.7 ____ 1.8 ____ ns tHB Byte Enable Hold Time 0.5 ____ 0.5 ____ ns tSW R/W Setup Time 1.7 ____ 1.8 ____ ns tHW R/W Hold Time 0.5 ____ 0.5 ____ ns tSD Input Data Setup Time 1.7 ____ 1.8 ____ ns tHD Input Data Hold Time 0.5 ____ 0.5 ____ ns tSAD ADS Setup Time 1.7 ____ 1.8 ____ ns tHAD ADS Hold Time 0.5 ____ 0.5 ____ ns CNTEN Setup Time 1.7 ____ 1.8 ____ ns tHCN CNTEN Hold Time 0.5 ____ 0.5 ____ ns tSRPT REPEAT Setup Time 1.7 ____ 1.8 ____ ns tHRPT REPEAT Hold Time 0.5 ____ 0.5 ____ ns tOE Output Enable to Data Valid ____ 4.4 ____ 4.6 ns 1 ____ 1 ____ ns ns tSCN tOLZ(6) (6) Output Enable to Output Low-Z tOHZ Output Enable to Output High-Z 1 3.6 1 4.2 tCD1 Clock to Data Valid (Flow-Through)(1) ____ 12 ____ 15 ns tCD2 Clock to Data Valid (Pipelined) (1) ____ 3.6 ____ 4.2 ns Data Output Hold After Clock High 1 ____ 1 ____ ns tCKHZ Clock High to Output High-Z 1 3.6 1 4.2 ns tCKLZ(6) Clock High to Output Low-Z 1 ____ 1 ____ ns tINS Interrupt Flag Set Time ____ 7 ____ 7 ns tINR Interrupt Flag Reset Time ____ 7 ____ 7 ns tCOLS Collision Flag Set Time ____ 3.6 ____ 4.2 ns tCOLR Collision Flag Reset Time ____ 3.6 ____ 4.2 ns tZZSC Sleep Mode Set Cycles 2 ____ 2 ____ cycles tZZRC Sleep Mode Recovery Cycles 3 ____ 3 ____ cycles 5 ____ 6 ____ ns tDC (6) Port-to-Port Delay tCO Clock-to-Clock Offset tOFS Clock-to-Clock Offset for Collision Detection Please refer to Collision Detection Timing Table on Page 19 5678 tbl 11 NOTES: 1. The Pipelined output parameters (tCYC2, tCD2) apply to either or both left and right ports when FT/PIPEX = VDD (2.5V). Flow-through parameters (tCYC1, tCD1) apply when FT/PIPE = Vss (0V) for that port. 2. All input signals are synchronous with respect to the clock except for the asynchronous Output Enable (OE), FT/PIPE and OPT. FT/PIPE and OPT should be treated as DC signals, i.e. steady state during operation. 3. These values are valid for either level of VDDQ (3.3V/2.5V). See page 6 for details on selecting the desired operating voltage levels for each port. 4. Guaranteed by design (not production tested). 6.42 10 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Timing Waveform of Read Cycle for Pipelined Operation (FT/PIPE'X' = VIH)(1,2) tCYC2 tCH2 tCL2 CLK CE0 tSC tSC tHC tHC (3) CE1 tSB tSB tHB BEn R/W tSW tHW tSA ADDRESS (4) tHA An An + 1 (1 Latency) An + 2 An + 3 tDC tCD2 DATAOUT Qn tCKLZ OE tHB (5) Qn + 1 Qn + 2 (5) (1) tOHZ tOLZ (1) , tOE 5678 drw 05 Timing Waveform of Read Cycle for Flow-through Output (FT/PIPE"X" = VIL)(1,2,6) tCYC1 tCH1 tCL1 CLK CE0 tSC tSC tHC (3) CE1 tSB tHB BEn tSB R/W tHB tSW tHW tSA ADDRESS tHC (4) tHA An An + 1 tCD1 An + 2 tCKHZ Qn DATAOUT Qn + 1 tCKLZ OE An + 3 tDC tOHZ Qn + 2 tOLZ (5) tDC (1) tOE 5678 drw 06 NOTES: 1. OE is asynchronously controlled; all other inputs depicted in the above waveforms are synchronous to the rising clock edge. 2. ADS = VIL, CNTEN and REPEAT = VIH. 3. The output is disabled (High-Impedance state) by CE0 = VIH, CE1 = VIL, BEn = VIH following the next rising edge of the clock. Refer to Truth Table 1. 4. Addresses do not have to be accessed sequentially since ADS = VIL constantly loads the address on the rising edge of the CLK; numbers are for reference use only. 5. If BEn was HIGH, then the appropriate Byte of DATA OUT for Qn + 2 would be disabled (High-Impedance state). 6. "x" denotes Left or Right port. The diagram is with respect to that port. 6.42 11 , IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Timing Waveform of a Multi-Device Pipelined Read(1,2) tCYC2 tCH2 tCL2 CLK tSA tHA A0 ADDRESS(B1) tSC tHC CE0(B1) tSC tHC tCD2 tCD2 tCKHZ Q0 DATAOUT(B1) tSC tCKHZ A6 A5 A4 A3 A2 A1 tSC CE0(B2) Q3 tCKLZ tDC tHA A0 ADDRESS(B2) tCD2 Q1 tDC tSA A6 A5 A4 A3 A2 A1 tHC tHC tCD2 tCKHZ tCD2 , DATAOUT(B2) Q4 Q2 tCKLZ tCKLZ 5678 drw 07 Timing Waveform of a Multi-Device Flow-Through Read(1,2) tCH1 tCYC1 tCL1 CLK tSA tH A A0 ADDRESS(B1) CE0(B1) tSC tHC tSC tHC tCD1 tCD1 D0 DATAOUT(B1) tDC tSA ADDRESS(B2) A6 A5 A4 A3 A2 A1 tCKHZ (1) tCD1 tCD1 D3 D1 tDC tCKLZ (1) D5 tCKHZ(1) tCKLZ (1) tHA A0 A1 A6 A5 A4 A3 A2 tSC tHC CE0(B2) tSC tHC tCD1 DATAOUT(B2) tCKLZ (1) tCKHZ (1) tCKHZ (1) tCD1 D2 tCKLZ (1) D4 , 5678 drw 08 NOTES: 1. B1 Represents Device #1; B2 Represents Device #2. Each Device consists of one IDT70T3539M for this waveform, and are setup for depth expansion in this example. ADDRESS(B1) = ADDRESS(B2) in this situation. 2. BEn, OE, and ADS = VIL; CE1(B1) , CE1(B2) , R/W, CNTEN, and REPEAT = VIH. 6.42 12 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Timing Waveform of Left Port Write to Pipelined Right Port Read(1,2,4) CLK"A" tSW tHW tSA tHA R/W"A " ADDRESS"A" NO MATCH MATCH tSD DATAIN"A" tHD VALID tCO(3) CLK"B" tCD2 R/W"B" ADDRESS"B" tSW tHW tSA tHA NO MATCH MATCH DATAOUT"B" VALID , tDC 5678 drw 09 NOTES: 1. CE0, BEn, and ADS = VIL; CE1, CNTEN, and REPEAT = VIH. 2. OE = VIL for Port "B", which is being read from. OE = VIH for Port "A", which is being written to. 3. If tCO < minimum specified, then data from Port "B" read is not valid until following Port "B" clock cycle (ie, time from write to valid read on opposite port will be tCO + 2 tCYC2 + tCD2 ). If tCO > minimum, then data from Port "B" read is available on first Port "B" clock cycle (ie, time from write to valid read on opposite port will be tCO + t CYC2 + t CD2). 4. All timing is the same for Left and Right ports. Port "A" may be either Left or Right port. Port "B" is the opposite of Port "A" Timing Waveform with Port-to-Port Flow-Through Read(1,2,4) CLK "A" tSW tHW R/W "A" tSA ADDRESS "A" "A" NO MATCH MATCH tSD DATAIN tHA tHD VALID tCO (3) CLK "B" tCD1 R/W "B" ADDRESS "B" tSW tHW tSA tHA NO MATCH MATCH tCD1 DATAOUT "B" VALID VALID tDC tDC , 5678 drw 10 NOTES: 1. CE0, BEn, and ADS = VIL; CE1, CNTEN, and REPEAT = VIH. 2. OE = VIL for the Right Port, which is being read from. OE = VIH for the Left Port, which is being written to. 3. If tCO < minimum specified, then data from Port "B" read is not valid until following Port "B" clock cycle (i.e., time from write to valid read on opposite port will be tCO + tCYC + tCD1). If tCO > minimum, then data from Port "B" read is available on first Port "B" clock cycle (i.e., time from write to valid read on opposite port will be tCO + t CD1). 4. All timing is the same for both left and right ports. Port "A" may be either left or right port. Port "B" is the opposite of Port "A". 6.42 13 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Timing Waveform of Pipelined Read-to-Write-to-Read (OE = VIL)(2) tCYC2 tCH2 tCL2 CLK CE0 tSC tHC CE1 tSB tHB BEn tSW tHW R/W (3) ADDRESS tSW tHW An tSA tHA An +1 An + 2 An + 3 An + 2 An + 4 tSD tHD DATAIN Dn + 2 tCD2 (1) tCKHZ tCKLZ tCD2 Qn + 3 Qn DATAOUT (4) READ NOP WRITE READ 5678 drw 11 NOTES: 1. Output state (High, Low, or High-impedance) is determined by the previous cycle control signals. 2. CE 0, BEn, and ADS = VIL; CE1, CNTEN, and REPEAT = VIH. "NOP" is "No Operation". 3. Addresses do not have to be accessed sequentially since ADS = VIL constantly loads the address on the rising edge of the CLK; numbers are for reference use only. 4. "NOP" is "No Operation." Data in memory at the selected address may be corrupted and should be re-written to guarantee data integrity. , Timing Waveform of Pipelined Read-to-Write-to-Read ( OE Controlled)(2) tCH2 tCYC2 tCL2 CLK CE0 tSC tHC CE1 tSB tHB BEn tSW tHW R/W (3) ADDRESS tSW tHW An tSA tHA An +1 An + 2 tSD DATAIN Dn + 2 tCD2 (1) Qn DATAOUT An + 3 An + 4 An + 5 tHD Dn + 3 tCKLZ tCD2 Qn + 4 (4) tOHZ OE READ WRITE READ , NOTES: 5678 drw 12 1. Output state (High, Low, or High-impedance) is determined by the previous cycle control signals. 2. CE0, BEn, and ADS = VIL; CE1, CNTEN, and REPEAT = VIH. 3. Addresses do not have to be accessed sequentially since ADS = VIL constantly loads the address on the rising edge of the CLK; numbers are for reference use only. 4. This timing does not meet requirements for fastest speed grade. This waveform indicates how logically it could be done if timing so allows. 6.42 14 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Timing Waveform of Flow-Through Read-to-Write-to-Read (OE = VIL)(2) tCH1 tCYC1 tCL1 CLK CE0 tSC tHC CE1 tSB tHB BEn tSW tHW R/W tSW tHW (3) ADDRESS tSA An tHA An +1 An + 2 An + 4 An + 3 An + 2 tSD tHD DATAIN Dn + 2 tCD1 (1) tCD1 Qn DATAOUT tCD1 Qn + 1 tDC tCKLZ tCKHZ READ NOP (5) WRITE tCD1 Qn + 3 tDC READ , 5678 drw 13 Timing Waveform of Flow-Through Read-to-Write-to-Read (OE Controlled)(2) tCYC1 tCH1 tCL1 CLK CE0 tSC tHC CE1 tSB tHB BEn tSW tHW tSW tHW R/W (3) An tSA tHA ADDRESS An +1 DATAIN (1) DATAOUT An + 2 tSD tHD An + 3 Dn + 2 Dn + 3 tDC tCD1 An + 4 tOE tCD1 Qn tCKLZ tOHZ An + 5 tCD1 Qn + 4 tDC OE READ WRITE READ 5678 drw 14 NOTES: 1. Output state (High, Low, or High-impedance) is determined by the previous cycle control signals. 2. CE 0, BEn, and ADS = VIL; CE1, CNTEN, and REPEAT = VIH. 3. Addresses do not have to be accessed sequentially since ADS = VIL constantly loads the address on the rising edge of the CLK; numbers are for reference use only. 4. "NOP" is "No Operation." Data in memory at the selected address may be corrupted and should be re-written to guarantee data integrity. 6.42 15 , IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Timing Waveform of Pipelined Read with Address Counter Advance(1) tCH2 tCYC2 tCL2 CLK tSA tHA An ADDRESS tSAD tHAD ADS tSAD tHAD CNTEN tSCN tHCN tCD2 DATAOUT Qx - 1(2) , Qn + 2(2) Qn + 1 Qn Qx Qn + 3 tDC READ EXTERNAL ADDRESS READ WITH COUNTER COUNTER HOLD READ WITH COUNTER 5678 drw 15 Timing Waveform of Flow-Through Read with Address Counter Advance(1) tCYC1 tCH1 tCL1 CLK tSA ADDRESS tHA An tSAD tHAD tSAD tHAD ADS tSCN tHCN CNTEN tCD1 DATAOUT Qx(2) Qn Qn + 1 Qn + 2 Qn + 3(2) , Qn + 4 tDC READ EXTERNAL ADDRESS READ WITH COUNTER COUNTER HOLD READ WITH COUNTER 5678 drw 16 NOTES: 1. CE0, OE, BEn = VIL; CE1, R/W, and REPEAT = V IH. 2. If there is no address change via ADS = V IL (loading a new address) or CNTEN = VIL (advancing the address), i.e. ADS = VIH and CNTEN = VIH, then the data output remains constant for subsequent clocks. 6.42 16 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Timing Waveform of Write with Address Counter Advance (Flow-through or Pipelined Inputs)(1) tCH2 t CYC2 tCL2 CLK tSA tHA An ADDRESS INTERNAL(3) ADDRESS An(7) An + 2 An + 1 An + 4 An + 3 tSAD tHAD ADS tSCN tHC N CNTEN tSD tHD Dn + 1 Dn DATAIN WRITE EXTERNAL ADDRESS Dn + 1 Dn + 3 Dn + 2 WRITE WRITE WITH COUNTER COUNTER HOLD Dn + 4 WRITE WITH COUNTER , 5678 drw 17 Timing Waveform of Counter Repeat(2,6) tCYC2 CLK tSA tHA An ADDRESS (3) INTERNAL ADDRESS An+2 An+1 An An+2 An An+1 An+2 An+2 tSAD tHAD ADS tSW tHW R/W tSCN tHCN CNTEN REPEAT (4) tSRPT tHRPT , tSD tHD DATAIN D0 D3 D2 D1 tCD1 An DATAOUT WRITE TO ADS ADDRESS An ADVANCE COUNTER WRITE TO An+1 ADVANCE COUNTER WRITE TO An+2 HOLD COUNTER WRITE TO An+2 REPEAT READ LAST ADS ADDRESS An An+1 ADVANCE COUNTER READ An+1 An+2 An+2 , ADVANCE COUNTER READ An+2 HOLD COUNTER READ An+2 5678 drw 18 NOTES: 1. CE 0, BEn, and R/W = VIL; CE1 and REPEAT = VIH. 2. CE 0, BEn = VIL; CE1 = VIH. 3. The "Internal Address" is equal to the "External Address" when ADS = VIL and equals the counter output when ADS = VIH. 4. No dead cycle exists during REPEAT operation. A READ or WRITE cycle may be coincidental with the counter REPEAT cycle: Address loaded by last valid ADS load will be accessed. For more information on REPEAT function refer to Truth Table II. 5. CNTEN = VIL advances Internal Address from ‘An’ to ‘An +1’. The transition shown indicates the time required for the counter to advance. The ‘An +1’Address is written to during this cycle. 6. For Pipelined Mode user should add 1 cycle latency for outputs as per timing waveform of read cycle for pipelined operations. 6.42 17 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Waveform of Interrupt Timing(2) CLKL tSW tHW tSA tHA R/WL ADDRESSL(3) 7FFFF tSC CEL tHC (1) tINS INTR tINR CLKR tSC tHC CER(1) R/WR ADDRESSR(3) tSW tHW tSA tHA 7FFFF NOTES: 1. CE0 = VIL and CE 1 = VIH 2. All timing is the same for Left and Right ports. 3. Address is for internal register, not the external bus, i.e., address needs to be qualified by one of the Address counter control signals. 5678 drw 19 Truth Table III — Interrupt Flag(1) Left Port CLKL R/WL (2) CEL (2) Right Port (2) A18L-A0L INTL CLKR R/WR CER(2) A18R-A0R Function INTR ↑ L L 7FFFF X ↑ X X X L Set Right INTR Flag ↑ X X X X ↑ H L 7FFFF H Reset Right INTR Flag ↑ X X X L ↑ L L 7FFFE X Set Left INTL Flag ↑ H L 7FFFE H ↑ X X X X Reset Left INTL Flag NOTES: 1. INTL and INTR must be initialized at power-up by Resetting the flags. 2. CE0 = VIL and CE 1 = VIH. R/W and CE are synchronous with respect to the clock and need valid set-up and hold times. 3. Address is for internal register, not the external bus, i.e., address needs to be qualified by one of the Address counter control signals. 6.42 18 5678 tbl 12 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Waveform of Collision Timing(1,2) CLKL tOFS tSA (4) tHA ADDRESSL A3 A2 A1 A0 tCOLR tCOLS COLL (3) tOFS CLKR tSA tHA (4) ADDRESSR A0 A3 A2 A1 tCOLR tCOLS COLR 5678 drw 20 NOTES: 1. CE0 = VIL, CE1 = VIH. 2. For reading port, OE is a Don't care on the Collision Detection Logic. Please refer to Truth Table IV for specific cases. 3. Leading Port Output flag might output 3tCYC 2 + tCOLS after Address match. 4. Address is for internal register, not the external bus, i.e., address needs to be qualified by one of the Address counter control signals. Collision Detection Timing(3,4) tOFS (ns) Cycle Time Region 1 (ns) (1) NOTES: 1. Region 1 Both ports show collision after 2nd cycle for Addresses 0, 2, 4 etc. 2. Region 2 Leading port shows collision after 3rd cycle for addresses 0, 3, 6, etc. while trailing port shows collision after 2nd cycle for addresses 0, 2, 4 etc. 3. All the production units are tested to midpoint of each region. 4. These ranges are based on characterization of a typical device. Region 2 (ns) (2) 5ns 0 - 2.8 2.81 - 4.6 6ns 0 - 3.8 3.81 - 5.6 7.5ns 0 - 5.3 5.31 - 7.1 5678 tbl 13 Truth Table IV — Collision Detection Flag Left Port CLKL R/WL (1) CEL (1) Right Port A18L-A0L (2) COLL CLKR (1) R/WR CE R(1) A18R-A0R(2) COLR Function ↑ H L MATCH H ↑ H L MATCH H Both ports reading. Not a valid collision. No flag output on either port. ↑ H L MATCH L ↑ L L MATCH H Left port reading, Right port writing. Valid collision, flag output on Left port. ↑ L L MATCH H ↑ H L MATCH L Right port reading, Left port writing. Valid collision, flag output on Right port. ↑ L L MATCH L ↑ L L MATCH L Both ports writing. Valid collision. Flag output on both ports. NOTES: 1. CE 0 = VIL and CE 1 = VIH. R/W and CE are synchronous with respect to the clock and need valid set-up and hold times. 2. Address is for internal register, not the external bus, i.e., address needs to be qualified by one of the Address counter control signals. 6.42 19 5678 tbl 14 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Timing Waveform - Entering Sleep Mode (1,2) R/W (3) Timing Waveform - Exiting Sleep Mode (1,2) An An+1 (5) R/W OE (5) Dn DATAOUT Dn+1 (4) NOTES: 1. CE 1 = V IH. 2. All timing is same for Left and Right ports. 3. CE0 has to be deactivated (CE0 = VIH) three cycles prior to asserting ZZ (ZZx = VIH) and held for two cycles after asserting ZZ (ZZx = VIH). 4. CE0 has to be deactivated (CE0 = VIH) one cycle prior to de-asserting ZZ (ZZx = VIL) and held for three cycles after de-asserting ZZ (ZZx = VIL). 5. The device must be in Read Mode (R/W High) when exiting sleep mode. Outputs are active but data is not valid until the following cycle. 6.42 20 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Functional Description The IDT70T3539M provides a true synchronous Dual-Port Static RAM interface. Registered inputs provide minimal set-up and hold times on address, data, and all critical control inputs. All internal registers are clocked on the rising edge of the clock signal, however, the self-timed internal write pulse width is independent of the cycle time. An asynchronous output enable is provided to ease asynchronous bus interfacing. Counter enable inputs are also provided to stall the operation of the address counters for fast interleaved memory applications. A HIGH on CE0 or a LOW on CE1 for one clock cycle will power down the internal circuitry to reduce static power consumption. Multiple chip enables allow easier banking of multiple IDT70T3539Ms for depth expansion configurations. Two cycles are required with CE0 LOW and CE1 HIGH to re-activate the outputs. Interrupts If the user chooses the interrupt function, a memory location (mail box or message center) is assigned to each port. The left port interrupt flag (INTL) is asserted when the right port writes to memory location 7FFFE (HEX), where a write is defined as CER = R/WR = VIL per the Truth Table. The left port clears the interrupt through access of address location 7FFFE when CEL = VIL and R/WL = VIH. Likewise, the right port interrupt flag (INT R ) is asserted when the left port writes to memory location 7FFFF (HEX) and to clear the interrupt flag (INTR), the right port must read the memory location 7FFFF. The message (36 bits) at 7FFFE or 7FFFF is user-defined since it is an addressable SRAM location. If the interrupt function is not used, address locations 7FFFE and 7FFFF are not used as mail boxes, but as part of the random access memory. Refer to Truth Table III for the interrupt operation. Collision Detection Collision is defined as an overlap in access between the two ports resulting in the potential for either reading or writing incorrect data to a specific address. For the specific cases: (a) Both ports reading - no data is corrupted, lost, or incorrectly output, so no collision flag is output on either port. (b) One port writing, the other port reading - the end result of the write will still be valid. However, the reading port might capture data that is in a state of transition and hence the reading port’s collision flag is output. (c) Both ports writing - there is a risk that the two ports will interfere with each other, and the data stored in memory will not be a valid write from either port (it may essentially be a random combination of the two). Therefore, the collision flag is output on both ports. Please refer to Truth Table IV for all of the above cases. The alert flag (COLX) is asserted on the 2nd or 3rd rising clock edge of the affected port following the collision, and remains low for one cycle. Please refer to Collision Detection Timing Table on Page 19. During that next cycle, the internal arbitration is engaged in resetting the alert flag (this avoids a specific requirement on the part of the user to reset the alert flag). If two collisions occur on subsequent clock cycles, the second collision may not generate the appropriate alert flag. A third collision will generate the alert flag as appropriate. In the event that a user initiates a burst access on both ports with the Preliminary Industrial and Commercial Temperature Ranges same starting address on both ports and one or both ports writing during each access (i.e., imposes a long string of collisions on contiguous clock cycles), the alert flag will be asserted and cleared every other cycle. Please refer to the Collision Detection timing waveform on Page 19. Collision detection on the IDT70T3539M represents a significant advance in functionality over current sync multi-ports, which have no such capability. In addition to this functionality the IDT70T3539M sustains the key features of bandwidth and flexibility. The collision detection function is very useful in the case of bursting data, or a string of accesses made to sequential addresses, in that it indicates a problem within the burst, giving the user the option of either repeating the burst or continuing to watch the alert flag to see whether the number of collisions increases above an acceptable threshold value. Offering this function on chip also allows users to reduce their need for arbitration circuits, typically done in CPLD’s or FPGA’s. This reduces board space and design complexity, and gives the user more flexibility in developing a solution. Sleep Mode TThe IDT70T3539M is equipped with an optional sleep or low power mode on both ports. The sleep mode pin on both ports is asynchronous and active high. During normal operation, the ZZ pin is pulled low. When ZZ is pulled high, the port will enter sleep mode where it will meet lowest possible power conditions. The sleep mode timing diagram shows the modes of operation: Normal Operation, No Read/Write Allowed and Sleep Mode. For normal operation all inputs must meet setup and hold times prior to sleep and after recovering from sleep. Clocks must also meet cycle high and low times during these periods. Three cycles prior to asserting ZZ (ZZx = VIH) and three cycles after de-asserting ZZ (ZZx = VIL), the device must be disabled via the chip enable pins. If a write or read operation occurs during these periods, the memory array may be corrupted. Validity of data out from the RAM cannot be guaranteed immediately after ZZ is asserted (prior to being in sleep). When exiting sleep mode, the device must be in Read mode (R/Wx = VIH)when chip enable is asserted, and the chip enable must be valid for one full cycle before a read will result in the output of valid data. During sleep mode the RAM automatically deselects itself. The RAM disconnects its internal clock buffer. The external clock may continue to run without impacting the RAMs sleep current (IZZ). All outputs will remain in high-Z state while in sleep mode. All inputs are allowed to toggle. The RAM will not be selected and will not perform any reads or writes. 6.42 21 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Depth and Width Expansion The IDT70T3539M features dual chip enables (refer to Truth Table I) in order to facilitate rapid and simple depth expansion with no requirements for external logic. Figure 4 illustrates how to control the various chip enables in order to expand two devices in depth. Preliminary Industrial and Commercial Temperature Ranges The IDT70T3539M can also be used in applications requiring expanded width, as indicated in Figure 4. Through combining the control signals, the devices can be grouped as necessary to accommodate applications needing 72-bits or wider. A19 IDT70T3539M CE0 CE1 IDT70T3539M CE0 CE1 VDD Control Inputs Control Inputs IDT70T3539M CE1 IDT70T3539M CE1 CE0 CE0 Control Inputs VDD Control Inputs 5678 drw 22 Figure 4. Depth and Width Expansion with IDT70T3539M JTAG Functionality and Configuration The IDT70T3539M is composed of two independent memory arrays, and thus cannot be treated as a single JTAG device in the scan chain. The two arrays (A and B) each have identical characteristics and commands but must be treated as separate entities in JTAG operations. .Please refer to Figure 5. JTAG signaling must be provided serially to each array and utilize the information provided in the Identification Register Definitions, Scan BE, R/W, OE, CLK, ADS, REPEAT, CNTEN Register Sizes, and System Interface Parameter tables. Specifically, commands for Array B must precede those for Array A in any JTAG operations sent to the IDT70T3539M. Please reference Application Note AN-411, "JTAG Testing of Multichip Modules" for specific instructions on performing JTAG testing on the IDT70T3539M. AN-411 is available at www.idt.com. IDT70T3539M TDI Array A TDOA TDIB Array B TCK TMS TRST 5678drw 23 Figure 5. JTAG Configuration for IDT70T3539M 6.42 22 TDO IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges JTAG Timing Specifications tJF tJCL tJCYC tJR tJCH TCK Device Inputs(1)/ TDI/TMS tJS Device Outputs(2)/ TDO tJDC tJH tJRSR tJCD TRST , Figure 6. Standard JTAG Timing tJRST NOTES: 1. Device inputs = All device inputs except TDI, TMS, and TRST. 2. Device outputs = All device outputs except TDO. JTAG AC Electrical Characteristics (1,2,3,4) 70T3539M Symbol Parameter Min. Max. Units tJCYC JTAG Clock Input Period 100 ____ ns tJCH JTAG Clock HIGH 40 ____ ns tJCL JTAG Clock Low 40 ____ ns tJR JTAG Clock Rise Time ____ 3(1) ns tJF JTAG Clock Fall Time ____ (1) 3 ns tJRST JTAG Reset 50 ____ ns tJRSR JTAG Reset Recovery 50 ____ ns tJCD JTAG Data Output ____ 25 ns tJDC JTAG Data Output Hold 0 ____ ns tJS JTAG Setup 15 ____ ns tJH JTAG Hold 15 ____ ns 5678 tbl 15 NOTES: 1. Guaranteed by design. 2. 30pF loading on external output signals. 3. Refer to AC Electrical Test Conditions stated earlier in this document. 4. JTAG operations occur at one speed (10MHz). The base device may run at any speed specified in this datasheet. 6.42 23 5678 drw 24 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Identification Register Definitions Instruction Field Array B Value Array B Revision Number (31:28) 0x0 IDT Device ID (27:12) 0x333 IDT JEDEC ID (11:1) 0x33 ID Register Indicator Bit (Bit 0) 1 Instruction Field Array A Value Description Array A Revision Number (63:60) 0x0 IDT Device ID (59:44) 0x333 IDT JEDEC ID (43:33) 0x33 ID Register Indicator Bit (Bit 32) 1 Reserved for Version number Defines IDT Part number Allows unique identification of device vendor as IDT Indicates the presence of an ID Register 5678 tbl 16 Scan Register Sizes Bit Size Array A Bit Size Array B Bit Size 70T3539M Instruction (IR) 4 4 8 Bypass (BYR) 1 1 2 32 32 64 Note (3) Note (3) Note (3) Register Name Identification (IDR) Boundary Scan (BSR) 5678 tbl 17 System Interface Parameters Instruction EXTEST Code Description Forces contents of the boundary scan cells onto the device outputs (1). Places the boundary scan register (BSR) between TDI and TDO. 00000000 BYPASS 11111111 IDCODE 00100010 Loads the ID register (IDR) with the vendor ID code and places the register between TDI and TDO. 01000100 Places the bypass register (BYR) between TDI and TDO. Forces all device output drivers except INTx and COLx to a High-Z state. HIGHZ Places the bypass register (BYR) between TDI and TDO. Uses BYR. Forces contents of the boundary scan cells onto the device outputs. Places the bypass register (BYR) between TDI and TDO. CLAMP 00110011 SAMPLE/PRELOAD 00010001 Places the boundary scan register (BSR) between TDI and TDO. SAMPLE allows data from device inputs (2) to be captured in the boundary scan cells and shifted serially through TDO. PRELOAD allows data to be input serially into the boundary scan cells via the TDI. 01010101, 01110111, 10001000, 10011001, 10101010, 10111011, 11001100 Several combinations are reserved. Do not use codes other than those identified above. RESERVED PRIVATE 01100110,11101110, 11011101 For internal use only. 5678 tbl 18 NOTES: 1. Device outputs = All device outputs except TDO. 2. Device inputs = All device inputs except TDI, TMS, and TRST. 3. The Boundary Scan Descriptive Language (BSDL) file for this device is available on the IDT website (www.idt.com), or by contacting your local IDT sales representative. 6.42 24 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Ordering Information IDT XXXXX Device Type A 999 A A Power Speed Package Process/ Temperature Range Blank I Commercial (0°C to +70°C) Industrial (-40°C to +85°C) BC 256-pin BGA (BC-256) 166 133 Commercial Only Commercial & Industrial S Standard Power Speed in Megahertz 70T3539M 18Mbit (512K x 36) 2.5V Synchronous Dual-Port RAM 5678 drw 25 IDT Clock Solution for IDT70T3539M Dual-Port Dual-Port I/O Specitications IDT Dual-Port Part Number Voltage 70T3539M 3.3/2.5 Clock Specifications I/O Input Capacitance Input Duty Cycle Requirement Maximum Frequency Jitter Tolerance IDT PLL Clock Device IDT Non-PLL Clock Device LVTTL 15pF 40% 166 75ps 5T2010 5T9010 5T905, 5T9050 5T907, 5T9070 5678 tbl 19 Preliminary Datasheet: Definition "PRELIMINARY' datasheets contain descriptions for products that are in early release. 6.42 25 IDT70T3539M High-Speed 2.5V 512K x 36 Dual-Port Synchronous Static RAM Preliminary Industrial and Commercial Temperature Ranges Datasheet Document History: 10/08/03: 10/20/03: 12/04/03: 02/02/04: 04/08/04: Initial Datasheet Page 1 Added "Includes JTAG functionality" to features Page 25 Added IDT Clock Solution Table Page 10 Added tOFS symbol and parameter to AC Electrical Characteristics table Page 19 Updated Collision Timing waveform Page 19 Added Collision Detection Timing table and footnotes Page 22 Added JTAG Configuration and JTAG Functionality descriptions Page 8 Changed ISB3 and IZZ in the DC Electrical Characteristics table Page 20 & 21 Clarified Sleep Mode Text and Waveform Page 22 Added an Application Note, AN-411, reference to the JTAG Functionality and Configuration text Page 4 Added another sentence to footnote 4 to recommend that boundary scan not be operated during sleep mode CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-5166 fax: 408-492-8674 www.idt.com The IDT logo is a registered trademark of Integrated Device Technology, Inc. 6.42 26 for Tech Support: 831-754-4613 [email protected]