HIGH-SPEED 2.5V ADVANCED 256/128K x 72 IDT70T3719/99M 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 (23.9Gbps bandwidth) – Fast 3.6ns clock to data out – Self-timed write allows fast cycle time ◆ ◆ ◆ ◆ ◆ ◆ ◆ – 1.7ns setup to clock and 0.5ns hold on all control, data, and address inputs @ 166MHz – Data input, address, byte enable and control registers 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 Industrial temperature range (-40°C to +85°C) is available at 133MHz Available in a 324-pin Green Ball Grid Array (BGA) Includes JTAG Functionality Functional Block Diagram BE7L BE7R BE0L BE0R FT/PIPEL 1/0 0a 1a 0h 1h 1h 0h 1a 0a a h h a FT/PIPER 1/0 R/WL R/WR CE0L CE1L 1 1 0 0 B W 0 L 1/0 OEL B W 7 L D OUT0-8_L D OUT9-17_L DO UT 18-26_L D OUT 27-35_L D OUT 36-44_L D OUT 45-53_L D OUT 54-62_L D OUT 63-72_L 1h 0h FT/PIPEL B W 7 R B W 0 R CE0R CE1R 1/0 OER D OUT0-8_R D OUT9-17_R D OUT18-26_R DOUT27-35_R DOUT36-44_R DOUT45-53_R DOUT54-62_R DOUT63-72_R 1a 0a 0a 1a , 0h 1h 0/1 FT/PIPER 0/1 a h h a 256/128K x 72 MEMORY ARRAY Byte 7 Byte 0 Byte 0 Byte 7 I/O0L - I/O71L DIN_L I/O0R - I/O71R DIN _R CLKL CLKR A17L (1) A 0L REPEATL ADSL CNTENL , A17R (1) Counter/ Address Reg. Counter/ Address Reg. ADDR_R ADDR_L INTERRUPT COLLISION DETECTION LOGIC CE0L CE1L R/W L A 0R REPEATR ADSR CNTENR CE0R CE1R TDI JTAG TDO R/W R COL L INTL TCK TMS TRST COL R INTR (2) ZZ L ZZ CONTROL ZZ R (2) LOGIC NOTES: 1. Address A17 is a NC for the IDT70T3799. 2. 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. 5687 drw 01 JUNE 2005 1 ©2005 Integrated Device Technology, Inc. DSC 5687/1 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced Industrial and Commercial Temperature Ranges Description: The IDT70T3719/99M is a high-speed 256K/128K x 72 bit synchronous Dual-Port 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 IDT70T3719/99M has been optimized for applications having unidirec- tional or bidirectional data flow 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 70T3719/99M 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced Industrial and Commercial Temperature Ranges Pin Configuration (2,3,4,5) 70T3719/99M BBG-324(6) 324-Pin BGA Top View(7) 06/27/05 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 A I/O39R I/O38R I/O37R I/O36R COLL A15L A12L A8L BE7L BE2L CE1L ADSL A6L A1L I/O32R I/O33R I/O34R I/O35R A B I/O39L I/O38L I/O37L I/O36L TDO A17L(1) A13L A10L BE6L BE5L BE1L OEL REPEATL A0L I/O32L I/O33L I/O34L I/O35L B C I/O40R I/O41R I/O42R I/O43R INTL A16L A11L A7L BE0L CE0L R/WL CNTENL A4L A3L I/O31R I/O30R I/O29R I/O28R C D I/O40L I/O41L I/O42L I/O43L TDI NC A14L A9L BE4L BE3L CLKL A5L A2L ZZL I/O31L I/O30L I/O29L I/O28L D E I/O47R I/O46R I/O45R I/O44R PL/FTL VDD VDDQL VDDQR VDDQR VDDQL VDDQL VDDQR VDDQR OPTL I/O24R I/O25R I/O26R I/O27R E F I/O47L I/O46L I/O45L I/O44L VDD VDD VDDQL Vs s Vs s Vs s VDD VDD VDD VDD I/O24L I/O25L I/O26L I/O27L F G I/O48R I/O49R I/O50R I/O51R VDDQR VDDQR Vs s Vs s Vs s Vs s Vs s Vs s VDDQR VDDQR I/O23R I/O22R I/O21R I/O20R G H I/O48L I/O49L I/O50L I/O51L VDDQL VDDQL Vs s Vs s Vs s Vs s Vs s Vs s VDDQL VDDQL I/O23L I/O22L I/O21L I/O20L H J I/O55R I/O54R I/O53R I/O52R VDDQR Vs s Vs s Vs s Vs s Vs s Vs s Vs s Vs s VDDQR I/O16R I/O17R I/O18R I/O19R J K I/O55L I/O54L I/O53L I/O52L VDDQR Vs s Vs s Vs s Vs s Vs s Vs s Vs s Vs s VDDQR I/O16L I/O17L I/O18L I/O19L K L I/O56R I/O57R I/O58R I/O59R VDDQL Vs s Vs s Vs s Vs s Vs s Vs s Vs s Vs s VDDQL I/O15R I/O14R I/O13R I/O12R L M I/O56L I/O57L I/O58L I/O59L VDDQL VDD Vs s Vs s Vs s Vs s Vs s Vs s VDDQL VDDQL I/O15L I/O14L I/O13L I/O12L M N I/O63R I/O62R I/O61R I/O60R VDDQR VDDQR VDDQL VDDQL Vs s Vs s VDD VDDQR VDDQR VDDQR I/O8R I/O9R I/O10R I/O11R N P I/O63L I/O62L I/O61L I/O60L ZZR TMS VDD VDD VDD VDDQL VDDQL VDD VDD OPTR I/O8L I/O9L I/O10L I/O11L P R I/O64R I/O65R I/O66R I/O67R COLR A17R(1) A12R A9R BE4R CE0R OER A6R A2R A1R I/O7R I/O6R I/O5R I/O4R R T I/O64L I/O65L I/O66L I/O67L PL/FTR A16R A13R A7R BE7R BE3R CE1R ADSR A4R A0R I/O7L I/O6L I/O5L I/O4L T U I/O71R I/O70R I/O69R I/O68R TCK INTR A14R A10R BE2R BE6R BE1R R/WR REPEATR A3R I/O0R I/O1R I/O2R I/O3R U V I/O71L I/O70L I/O69L I/O68L TRST NC A15R A11R A8R BE5R BE0R CLKR CNTENR A5R I/O0L I/O1L I/O2L I/O3L V 1 2 3 4 5 6 7 8 9 10 11 14 15 16 17 18 12 13 5687 tbl 01 NOTES: 1. Pin is a NC for IDT70T3799. 2. All VDD pins must be connected to 2.5V power supply. 3. 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). 4. All VSS pins must be connected to ground supply. 5. Package body is approximately 19mm x 19mm x 1.4mm, with 1.76mm ball-pitch. 6. This package code is used to reference the package diagram. 7. This text does not indicate orientation of the actual part-marking. 6.42 3 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced Industrial and Commercial Temperature Ranges Pin Names Left Port Right Port Names CE0L, CE1L CE0R, CE1R Chip Enables (Input)(6) R/WL R/WR Read/Write Enable (Input) OEL OER Output Enable (Input) A0L - A17L(5) A0R - A17R(5) Address (Input) I/O0L - I/O71L I/O0R - I/O71R 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 - BE7L BE0R - BE7R Byte Enables (9-bit bytes) (Input)(6) 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) TRST Reset (Initialize TAP Controller) (Input) INTL INTR Interrupt Flag (Output) COLL COLR Collision Alert (Output) 5687 tbl 02 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. Address A17x is a NC for the IDT70T3799M. 6. Chip Enables and Byte Enables are double buffered when PL/FT = VIH, i.e., the signals take two cycles to deselect. 6.42 4 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced Industrial and Commercial Temperature Ranges Truth Table I—Read/Write and Enable Control OE CLK CE0 CE1 X ½ H X X ½ X X ½ X ½ X (1,2,3,4,5) R/W ZZ I/O Operation(6) MODE All BE = X X L All Bytes= High-Z Deselected: Power Down L All BE = X X L All Bytes = High-Z Deselected: Power Down L H All BE = H X L All Bytes = High-Z All Bytes Deselected L H BEn = L, All other BE = H L L Byte n = DIN, All other Bytes = High-Z Write to Byte X Only ½ L H BE4-7 = L, BE0-3 = H L L Byte 4-7 = DIN, Byte 0-3 = High-Z Write to Lower Bytes Only X ½ L H BE4-7 = H, BE0-3 = L L L Byte 4-7 = High-Z, Byte 0-3 = DIN Write to Upper Bytes Only X ½ L H BE0-7 = L L L Byte 0-7 = DIN Write to All Bytes L ½ L H BEn = L, All other BE = H H L Byte n = DOUT, All other Bytes = High-Z Read Byte X Only L ½ L H BE4-7 = L, BE0-3 = H H L Byte 4-7 = DOUT, Byte 0-3 = High-Z Read Lower Bytes Only L ½ L H BE4-7 = H, BE0-3 = L H L Byte 4-7 = High-Z, Byte 0-3 = DOUT Read Upper Bytes Only L ½ L H All BE = L H L All Bytes = DOUT Read All Bytes H X X X All BE = X X L All Bytes = High-Z Outputs Disabled X X X X All BE = X X H All Bytes = High-Z Sleep Mode Byte Enables 5687 tbl 03 NOTES: 1. "H" = V IH, "L" = V IL, "X" = Don't Care. 2. ADS, CNTEN, REPEAT = Don't Care. See Truth Table II. 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. 5. For the examples shown here, BEn may correspond to any of the eight byte enable signals. Truth Table II—Address Counter Control (1,2) Address Previous Internal Address Internal Address Used CLK ADS(4) CNTEN REPEAT(4,6) I/O(3) An X An ½ L X H DI/O(n) (5) MODE External Address Used X An An + 1 ½ H L H DI/O(n+1) Counter Enabled-Internal Address generation X An + 1 An + 1 ½ H H H DI/O(n+1) Enabled Address Blocked-Counter disabled (An + 1 reused) X X An ½ X X L DI/O(n) Counter Set to last valid ADS load 5687 tbl 04 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, CE0, 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced Industrial and Commercial Temperature Ranges Recommended Operating Temperature and Supply Voltage Ambient Temperature Grade GND VDD 0 C to +70 C 0V 2.5V + 100mV -40OC to +85OC 0V 2.5V + 100mV O Commercial Industrial (1) O NOTES: 1. This is the parameter TA. This is the "instant on" case temperature. 5687 tbl 05 Recommended DC Operating Conditions with VDDQ at 2.5V Symbol Parameter Min. Typ. Max. Unit V DD Core Supply Voltage 2.4 2.5 2.6 V V DDQ I/O Supply Voltage (3) 2.4 2.5 2.6 V V SS Ground 0 0 0 V V IH Input High Volltage (Address, Control & Data I/O Inputs)(3) 1.7 ____ VDDQ + 100mV (2) V V IH Input High Voltage JTAG 1.7 ____ VDD + 100mV (2) V V IH Input High Voltage ZZ, OPT, PIPE/FT V DD - 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 _ 5687 tbl 06a 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 V DD Parameter Core Supply Voltage (3) VDDQ I/O Supply Voltage V SS Ground V IH Input High Voltage (Address, Control &Data I/O Inputs)(3) V IH Input High Voltage JTAG V IH Input High Voltage ZZ, OPT, PIPE/FT 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 V DD - 0.2V ____ VDD + 100mV (2) V (1) ____ 0.8 V ____ 0.2 V _ VIL Input Low Voltage -0.3 VIL Input Low Voltage ZZ, OPT, PIPE/FT -0.3(1) 5687 tbl 06b 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced 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 5687 tbl 07 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) Conditions(2) Max. Unit Input Capacitance VIN = 0V 15 pF Output Capacitance VOUT = 0V 10.5 Symbol CIN (2) COUT Parameter pF 5687 tbl 08 NOTES: 1. These parameters are determined by device characterization, but are not production tested. 2. COUT also references CI/O. DC Electrical Characteristics Over the Operating Temperature and Supply Voltage Range (VDD = 2.5V ± 100mV) 70T3719/99M 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 5687 tbl 09 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced Industrial and Commercial Temperature Ranges DC Electrical Characteristics Over the Operating Temperature and Supply Voltage Range (3) (VDD = 2.5V ± 100mV) 70T3719/99M S166 Com'l Only Symbol IDD ISB1(6) ISB2(6) ISB3 ISB4(6) Izz Parameter Test Condition Version 70T3719/99M S133 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 5687 tbl 10 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. IDD 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced 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 5687 tbl 11 50Ω 50Ω DATAOUT 1.5V/1.25 10pF (Tester) 5687 drw 03 Figure 1. AC Output Test load. ∆ tCD (Typical, ns) ∆ Capacitance (pF) from AC Test Load 6.42 9 5687 drw 04 , IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced 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) 70T3719/99M S166 Com'l Only Symbol tCYC1 Parameter Clock Cycle Time (Flow-Through)(1) (1) 70T3719/99M S133 Com'l & Ind Min. Max. Min. Max. Unit 20 ____ 25 ____ ns ns tCYC2 Clock Cycle Time (Pipelined) 6 ____ 7.5 ____ tCH1 Clock High Time (Flow-Through)(1) 8 ____ 10 ____ ns tCL1 Clock Low Time (Flow-Through)(1) 8 ____ 10 ____ ns tCH2 Clock High Time (Pipelined)(2) 2.4 ____ 3 ____ ns ns (1) tCL2 Clock Low Time (Pipelined) 2.4 ____ 3 ____ 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 ns tHC Chip Enable Hold Time 0.5 ____ 0.5 ____ 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 ns tHW R/W Hold Time 0.5 ____ 0.5 ____ 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 tSCN 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 Output Enable to Output Low-Z 1 ____ 1 ____ ns tOHZ Output Enable to Output High-Z 1 3.6 1 4.2 ns 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(4) 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 tOLZ(4) (4) tDC (4) Port-to-Port Delay tCO tOFS Clock-to-Clock Offset Please refer to collision Detection Timing Table on Page 19. Clock-to-Clock Offset for Collision Detection 5687 tbl 12 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced 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 5687 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 5687 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 DATAOUT 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 , IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced 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 5687 drw 07 Timing Waveform of a Multi-Device Flow-Through Read tCH1 (1,2) 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) tCD1 D2 tCKLZ (1) tCKHZ (1) D4 , 5687 drw 08 NOTES: 1. B1 Represents Device #1; B2 Represents Device #2. Each Device consists of one IDT70T3719/99M 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced 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 5687 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 , 5687 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced Industrial and Commercial Temperature Ranges Timing Waveform of Pipelined Read-to-Write-to-Read tCYC2 (OE = VIL)(2) 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 5687 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) tCH2 (2) 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: 5687 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced 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 tCD1 Qn + 1 tDC tCKLZ tCKHZ READ NOP (5) WRITE Qn + 3 tDC READ , 5687 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 5687 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 , IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced Industrial and Commercial Temperature Ranges Timing Waveform of Pipelined Read with Address Counter Advance tCH2 (1) 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 5687 drw 15 Timing Waveform of Flow-Through Read with Address Counter Advance 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 5687 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 (1) IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced 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 Timing Waveform of Counter Repeat Dn + 4 WRITE WITH COUNTER , 5687 drw 17 (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 5687 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Waveform of Interrupt Timing Advanced Industrial and Commercial Temperature Ranges (2) CLKL tSW tHW tSA tHA R/WL ADDRESSL(3) 3FFFF tSC CEL tHC (1) tINS INTR tINR CLKR tSC tHC CER(1) R/WR ADDRESSR(3) tSW tHW tSA tHA 3FFFF 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. Truth Table III — Interrupt Flag (1) Left Port CLKL R/WL CEL 5687 drw 19 Right Port (3,4) A17L-A0L INTL CLKR (2) R/WR CE R (2) A17R-A0R(3,4) INTR Function Ç L L 3FFFF X Ç X X X L Set Right INTR Flag Ç X X X X Ç X L 3FFFF H Reset Right INTR Flag Ç X X X L Ç L L 3FFFE X Set Left INTL Flag Ç H L 3FFFE H Ç 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. A17X is a NC for IDT70T3799, therefore Interrupt Addresses are 1FFFF and 1FFFE. 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. 6.42 18 5687 tbl 13 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced Industrial and Commercial Temperature Ranges Waveform of Collision Timing(1,2) Both Ports Writing with Left Port Clock Leading 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 5687 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 3tCYC2 + 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) Region 2 (ns) 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 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. (2) 56876 tbl 14 Truth Table IV — Collision Detection Flag Left Port CLKL R/WL CEL Ç H L Ç H Ç Ç Right Port (2) CER(1) A17R-A0R(2) COLR H L MATCH H Both ports reading. Not a valid collision. No flag output on either port Ç L L MATCH H Left port reading, Right port writing. Valid collision, flag output on Left port. H Ç H L MATCH L Right port reading, Left port writing. Valid collision, flag output on Right port. L Ç L L MATCH L Both ports writing. Valid collision. Flag output on both ports. COLL CLKR MATCH H Ç L MATCH L L L MATCH L L MATCH A17L-A0L (1) R/WR Function NOTES: 1. CE 0 = VIL and CE1 = 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 5687 tbl 15 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced 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. CE1 = 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 = V IH). 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Functional Description The IDT70T3719/99M 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 IDT70T3719/99Ms 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 3FFFE (HEX), where a write is defined as CER = R/WR = VIL per the Truth Table I. The left port clears the interrupt through access of address location 3FFFE 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 3FFFF (HEX) and to clear the interrupt flag (INTR), the right port must read the memory location 3FFFF (1FFFF or 1FFFE for IDT70T3799M). The message (72 bits) at 3FFFE or 3FFFF (1FFFF or 1FFFE for 70T3799M) is user-defined since it is an addressable SRAM location. If the interrupt function is not used, address locations 3FFFE and 3FFFF (1FFFF or 1FFFE for IDT70T3799M) 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 Advanced Industrial and Commercial Temperature Ranges alert flag as appropriate. In the event that a user initiates a burst access on both ports with the 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 IDT70T3719/99M represents a significant advance in functionality over current sync multi-ports, which have no such capability. In addition to this functionality the IDT70T3719/99M 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 The IDT70T3719/99M 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Depth and Width Expansion Advanced Industrial and Commercial Temperature Ranges The IDT70T3719/99M 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 144-bits. The IDT70T3719/99M 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. A18/A17(1) IDT70T3719/99M CE0 CE1 IDT70T3719/99M CE1 VDD VDD Control Inputs Control Inputs IDT70T3719/99M CE0 IDT70T3719/99M CE1 CE1 CE0 CE0 Control Inputs Control Inputs Figure 4. Depth and Width Expansion with IDT70T3719/99M 5687 drw 23 NOTE: 1. A18 is for IDT70T3719, A17 is for IDT70T3799. BE, R/W, OE, CLK, ADS, REPEAT, CNTEN , JTAG Functionality and Configuration The IDT70T3719/99M 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 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 IDT70T3719/99M. Please reference Application Note AN-411, "JTAG Testing of Multichip Modules" for specific instructions on performing JTAG testing on the IDT70T3719/99M. AN-411 is available at www.idt.com. IDT70T3719/99M TDI Array A TDOA TDIB Array B TCK TMS TRST 5687 drw 24 Figure 5. JTAG Configuration for IDT70T3719/99M 6.42 22 TDO IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced 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 , 5687 drw 25 tJRST Figure 5. Standard JTAG Timing 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) 70T3719/99M Symbol Parameter Min. Max. Units ns tJCYC JTAG Clock Input Period 100 ____ tJCH JTAG Clock HIGH 40 ____ ns tJCL JTAG Clock Low 40 ____ ns JTAG Clock Rise Time ____ (1) ns JTAG Clock Fall Time ____ (1) 3 ns ns tJR tJF 3 tJRST JTAG Reset 50 ____ tJRSR JTAG Reset Recovery 50 ____ ns tJCD JTAG Data Output ____ 25 ns 0 ____ ns 15 ____ ns 15 ____ ns tJDC tJS tJH JTAG Data Output Hold JTAG Setup JTAG Hold 5687 tbl 16 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced Industrial and Commercial Temperature Ranges Identification Register Definitions Instruction Field Array B Value Instruction Field Array A Array B Revision Number (31:28) 0x0 Revision Number (63:60) Value Description Array A 0x0 Reserved for Version number IDT Device ID (27:12)(1) 0x330 IDT Device ID (59:44)(1) 0x330 Defines IDT Part number IDT JEDEC ID (11:1) 0x33 IDT JEDEC ID (43:33) 0x33 Allows unique identification of device vendor as IDT ID Register Indicator Bit (Bit 0) 1 ID Register Indicator Bit (Bit 32) 1 Indicates the presence of an ID Register 5687 tbl 17 NOTE: 1. Device ID for IDT70T3719M is 0x330. Device ID for IDT70T3799M is 0x331. Scan Register Sizes Register Name Instruction (IR) Bit Size Array A Bit Size Array B Bit Size 70T3719M 4 4 8 Bypass (BYR) 1 1 2 Identification (IDR) 32 32 64 Note (3) Note (3) Note (3) Boundary Scan (BSR) 5687 tbl 18 System Interface Parameters Instruction Code Description Forces contents of the boundary scan cells onto the device outputs (1). Places the boundary scan register (BSR) between TDI and TDO. EXTEST 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. 5687 tbl 19 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 IDT70T3719/99M High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Advanced Industrial and Commercial Temperature Ranges Ordering Information IDT XXXXX Device Type A 999 A Power Speed Package A A Process/ Temperature Range Blank I Commercial (0°C to +70°C) Industrial (-40°C to +85°C) G Green BB 324-pin BGA (BBG-324) 166 133 Commercial Only Commercial & Industrial S Standard Power 70T3719M 70T3799M 18Mbit (256K x 72) 2.5V Synchronous Dual-Port RAM 9Mbit (128K x 72) 2.5V Synchronous Dual-Port RAM Speed in Megahertz 5687 drw 26 IDT Clock Solution for IDT70T3719/99M Dual-Port Dual-Port I/O Specitications IDT Dual-Port Part Number Voltage 70T3719/99M 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 5687 tbl 20 Datasheet Document History: 06/27/05: Initial Advanced Datasheet CORPORATE HEADQUARTERS 6024 Silver Creek Valley Road San Jose, CA 95138 for SALES: 800-345-7015 or 408-284-8200 fax: 408-284-2775 www.idt.com The IDT logo is a registered trademark of Integrated Device Technology, Inc. 6.42 25 for Tech Support: 408-284-2794 [email protected]