82C88 CMOS Bus Controller March 1997 Features Description • Compatible with Bipolar 8288 The Intersil 82C88 is a high performance CMOS Bus Controller manufactured using a self-aligned silicon gate CMOS process (Scaled SAJI IV). The 82C88 provides the control and command timing signals for 80C86, 80C88, 8086, 8088, 8089, 80186, and 80188 based systems. The high output drive capability of the 82C88 eliminates the need for additional bus drivers. • Performance Compatible with: - 80C86/80C88 . . . . . . . . . . . . . . . . . . . . . . . . . .(5/8MHz) - 80186/80188 . . . . . . . . . . . . . . . . . . . . . . . . . .(6/8MHz) - 8086/8088 . . . . . . . . . . . . . . . . . . . . . . . . . . . .(5/8MHz) - 8089 Static CMOS circuit design insures low operating power. The Intersil advanced SAJI process results in performance equal to or greater than existing equivalent products at a significant power savings. • Provides Advanced Commands for Multi-Master Busses • Three-State Command Outputs • Bipolar Drive Capability Ordering Information • Scaled SAJI IV CMOS Process • Single 5V Power Supply PART NUMBER • Low Power Operation - ICCSB . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10µA (Max) - ICCOP . . . . . . . . . . . . . . . . . . . . . . . . .1mA/MHz (Max) • Operating Temperature Ranges - C82C88 . . . . . . . . . . . . . . . . . . . . . . . . . .0oC to +70oC - I82C88 . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to +85oC - M82C88 . . . . . . . . . . . . . . . . . . . . . . . -55oC to +125oC CP82C88 PACKAGE TEMPERATURE RANGE 20 Ld PDIP 0oC to +70oC E20.3 0oC to +70oC -40oC to +85oC E20.3 CP82C88-10 IP82C88 CS82C88 20 Ld PLCC IS82C88 CD82C88 20 Ld CERDIP ID82C88 8406901RA N20.35 -40oC to +85oC 0oC to +70oC N20.35 SMD# MR82C88/B F20.3 F20.3 F20.3 F20.3 -55oC to +125oC 20 Pad CLCC 84069012A E20.3 0oC to +70oC -40oC to +85oC -55oC to +125oC MD82C88/B PKG. NO. SMD# J20.A J20.A Pinouts IOB 1 20 VCC CLK IOB VCC S0 20 LEAD PLCC, CLCC TOP VIEW S1 20 LEAD PDIP, CERDIP TOP VIEW CLK 2 19 S0 3 2 1 20 19 S1 3 18 S2 DT/ R 4 ALE 5 17 MCE/PDEN 5 16 DEN AEN 6 16 DEN AEN 6 15 CEN MRDC 7 15 CEN MRDC 7 14 INTA AMWC 8 14 INTA AMWC 8 13 IORC MWTC 9 12 AIOWC GND 10 9 10 11 12 13 IORC ALE AIOWC 17 MCE/PDEN IOWC 18 S2 GND 4 MWTC DT/ R 11 IOWC CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999 4-333 File Number 2979.1 82C88 Functional Diagram S0 STATUS DECODER S1 S2 COMMAND SIGNAL GENERATOR MRDC MWTC AMWC IORC IOWC AIOWC MULTIBUSTM COMMAND SIGNALS INTA DT/R CLK CONTROL LOGIC AEN CONTROL INPUT CEN CONTROL SIGNAL GENERATOR DEN MCE/PDEN ALE IOB VCC ADDRESS LATCH, DATA TRANSCEIVER, AND INTERRUPT CONTROL SIGNALS GND Pin Description PIN SYMBOL NUMBER VCC 20 VCC: The +5V power supply pin. A 0.1µF capacitor between pins 10 and 20 is recommended for decoupling. GND 10 GROUND. S0, S1, S2 19, 3, 18 I STATUS INPUT PINS: These pins are the input pins from the 80C86, 80C88,8086/88, 8089 processors. The 82C88 decodes these inputs to generate command and control signals at the appropriate time. When Status pins are not in use (passive), command outputs are held HIGH (See Table1). CLK 2 I CLOCK: This is a CMOS compatible input which receives a clock signal from the 82C84A or 82C85 clock generator and serves to establish when command/control signals are generated. ALE 5 O ADDRESS LATCH ENABLE: This signal serves to strobe an address into the address latches. This signal is active HIGH and latching occurs on the falling (HIGH to LOW) transition. ALE is intended for use with transparent D type latches, such as the 82C82 and 82C83H. DEN 16 O DATA ENABLE: This signal serves to enable data transceivers onto either the local or system data bus. This signal is active HIGH. DT/R 4 O DATA TRANSMIT/RECEIVE: This signal establishes the direction of data flow through the transceivers. A HIGH on this line indicates Transmit (write to I/O or memory) and a LOW indicates Receive (read from I/O or memory). AEN 6 I ADDRESS ENABLE: AEN enables command outputs of the 82C88 Bus Controller a minimum of 110ns (250ns maximum) after it becomes active (LOW). AEN going inactive immediately three-states the command output drivers. AEN does not affect the I/O command lines if the 82C88 is in the I/O Bus mode (IOB tied HIGH). CEN 15 I COMMAND ENABLE: When this signal is LOW all 82C88 command outputs and the DEN and PDEN control outputs are forced to their Inactive state. When this signal is HIGH, these same outputs are enabled. IOB 1 I INPUT/OUTPUT BUS MODE: When the IOB pin is strapped HIGH, the 82C88 functions in the I/O Bus mode. When it is strapped LOW, the 82C88 functions in the System Bus mode (See I/O Bus and System Bus sections). TYPE DESCRIPTION Intel™ is a Registered Trademark of Intel Corporation 4-334 82C88 Pin Description (Continued) PIN SYMBOL NUMBER TYPE DESCRIPTION AIOWC 12 O ADVANCED I/O WRITE COMMAND: The AIOWC issues an I/O Write Command earlier in the machine cycle to give I/O devices an early indication of a write instruction. Its timing is the same as a read command signal. AIOWC is active LOW. IOWC 11 O I/O WRITE COMMAND: This command line instructs an I/O device to read the data on the data bus. The signal is active LOW. IORC 13 O I/O READ COMMAND: This command line instructs an I/O device to drive its data onto the data bus. This signal is active LOW. AMWC 8 O ADVANCED MEMORY WRITE COMMAND: The AMWC issues a memory write command earlier in the machine cycle to give memory devices an early indication of a write instruction. Its timing is the same as a read command signal. AMWC is active LOW. MWTC 9 O MEMORY WRITE COMMAND: This command line instructs the memory to record the data present on the data bus. This signal is active LOW. MRDC 7 O MEMORY READ COMMAND: This command line instructs the memory to drive its data onto the data bus. MRDC is active LOW. INTA 14 O INTERRUPT ACKNOWLEDGE: This command line tells an interrupting device that its interrupt has been acknowledged and that it should drive vectoring information onto the data bus. This signal is active LOW. MCE/PDEN 17 O This is a dual function pin. MCE (IOB IS TIED LOW) Master Cascade Enable occurs during an interrupt sequence and serves to read a Cascade Address from a master 82C59A Priority Interrupt Controller onto the data bus. The MCE signal is active HIGH. PDEN (IOB IS TIED HIGH): Peripheral Data Enable enables the data bus transceiver for the I/O bus that DEN performs for the system bus. PDEN is active LOW. Functional Description The command logic decodes the three 80C86, 8086, 80C88, 8088, 80186, 80188 or 8089 status lines (S0, S1, S2) to determine what command is to be issued (see Table 1). TABLE 1. COMMAND DECODE DEFINITION 82C88 COMMAND S2 S1 S0 PROCESSOR STATE 0 0 0 Interrupt Acknowledge INTA 0 0 1 Read I/O Port IORC 0 1 0 Write I/O Port IOWC, AIOWC 0 1 1 Halt None 1 0 0 Code Access MRDC 1 0 1 Read Memory MRDC 1 1 0 Write Memory MWTC, AMWC 1 1 1 Passive None cessor, the 82C88 immediately activates the command lines using PDEN and DT/R to control the I/O bus transceiver. The I/O command lines should not be used to control the system bus in this configuration because no arbitration is present. This mode allows one 82C88 Bus Controller to handle two external busses. No waiting is involved when the CPU wants to gain access to the I/O bus. Normal memory access requires a “Bus Ready” signal (AEN LOW) before it will proceed. It is advantageous to use the IOB mode if I/O or peripherals dedicated to one processor exist in a multi-processor system. System Bus Mode The 82C88 is in the System Bus mode if the IOB pin is strapped LOW. In this mode, no command is issued until a specified time period after the AEN line is activated (LOW). This mode assumes bus arbitration logic will inform the bus controller (on the AEN line) when the bus is free for use. Both memory and I/O commands wait for bus arbitration. This mode is used when only one bus exists. Here, both I/O and memory are shared by more than one processor. I/O Bus Mode Command Outputs The 82C88 is in the I/O Bus mode if the IOB pin is strapped HIGH. In the I/O Bus mode, all I/O command lines IORC, IOWC, AIOWC, INTA) are always enabled (i.e., not dependent on AEN). When an I/O command is initiated by the pro- The advanced write commands are made available to initiate write procedures early in the machine cycle. This signal can be used to prevent the processor from entering an unnecessary wait state. 4-335 82C88 INTA (Interrupt Acknowledge) acts as an I/O read during an interrupt cycle. Its purpose is to inform an interrupting device that its interrupt is being acknowledged and that it should place vectoring information onto the data bus. The command outputs are: MRDC - Memory Read Command MWTC - Memory Write Command IORC - I/O Read Command IOWC - I/O Write Command AMWC - Advanced Memory Write Command AIOWC - Advanced I/O Write Command INTA - Interrupt Acknowledge Interrupt Acknowledge and MCE The MCE signal is used during an interrupt acknowledge cycle if the 82C88 is in the System Bus mode (IOB LOW). During any interrupt sequence, there are two interrupt acknowledge cycles that occur back to back. During the first interrupt cycle no data or address transfers take place. Logic should be provided to mask off MCE during this cycle. Just before the second cycle begins the MCE signal gates a master Priority Interrupt Controller’s (PIC) cascade address onto the processor’s local bus where ALE (Address Latch Enable) strobes it into the address latches. On the leading edge of the second interrupt cycle, the addressed slave PIC gates an interrupt vector onto the system data bus where it is read by the processor. If the system contains only one PIC, the MCE signal is not used. In this case, the second Interrupt Acknowledge signal gates the interrupt vector onto the processor bus. Control Outputs The control outputs of the 82C88 are Data Enable (DEN), Data Transmit/Receive (DT/R) and Master Cascade Enable/ Peripheral Data Enable (MCE/PDEN). The DEN signal determines when the external bus should be enabled onto the local bus and the DT/R determines the direction of data transfer. These two signals usually go to the chip select and direction pins of a transceiver. The MCE/PDEN pin changes function with the two modes of the 82C88. When the 82C88 is in the IOB mode (IOB HIGH), the PDEN signal serves as a dedicated data enable signal for the I/O or Peripheral System bus. Address Latch Enable and Halt Address Latch Enable (ALE) occurs during each machine cycle and serves to strobe the current address into the 82C82/82C83H address latches. ALE also serves to strobe the status (S0, S1, S2) into a latch for halt state decoding. Command Enable The Command Enable (CEN) input acts as a command qualifier for the 82C88. If the CEN pin is high, the 82C88 functions normally. If the CEN pin is pulled LOW, all command lines are held in their inactive state (not three-state). This feature can be used to implement memory partitioning and to eliminate address conflicts between system bus devices and resident bus devices. 4-336 82C88 Absolute Maximum Ratings Thermal Information Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +8.0V Input, Output or I/O Voltage . . . . . . . . . . . GND -0.5V to VCC +0.5V ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 1 Thermal Resistance (Typical) θJA (oC/W) θJC (oC/W) CERDIP Package . . . . . . . . . . . . . . . . 75 18 CLCC Package . . . . . . . . . . . . . . . . . . 85 22 PDIP Package . . . . . . . . . . . . . . . . . . . 75 N/A PLCC Package . . . . . . . . . . . . . . . . . . 75 N/A Storage Temperature Range . . . . . . . . . . . . . . . . . .-65oC to +150oC Maximum Junction Temperature Ceramic Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +175oC Plastic Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . +300oC (PLCC - Lead Tips Only) Operating Conditions Operating Voltage Range . . . . . . . . . . . . . . . . . . . . . +4.5V to +5.5V Operating Temperature Range C82C88. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to +70oC I82C88 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to +85oC M82C88 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to +125oC Die Characteristics Gate Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Gates CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. DC Electrical Specifications SYMBOL VCC = 5.0V ± 10%; TA = 0oC to +70oC (C82C88); TA = -40oC to +85oC (I82C88); TA = -55oC to +125oC (M82C88) PARAMETER MIN MAX UNITS VIH Logical One Input Voltage 2.0 2.2 - V V VIL Logical Zero Input Voltage - 0.8 V TEST CONDITIONS C82C88, I82C88 M82C88 VIHC CLK Logical One Input Voltage VCC -0.8 - V VILC CLK Logical Zero Input Voltage - 0.8 V VOH Output High Voltage Command Outputs 3.0 VCC -0.4 - V V IOH = -8.0mA IOH = -2.5mA Output High Voltage Control Outputs 3.0 VCC -0.4 - V V IOH = -4.0mA IOH = -2.5mA Output Low Voltage Command Outputs - 0.5 V IOL= +12.0mA Output Low Voltage Control Outputs - 0.4 V IOL = +8.0mA Input Leakage Current -1.0 1.0 µA VIN = GND or VCC, except S0, S1, S2, DIP Pins 1-2, 6, 15 Input Leakage Current-Status Bus -50 -300 µA VIN = 2.0V, S0, S1, S2 (See Note 1) -10.0 10.0 µA VO = GND or VCC, IOB = GND, AEN = VCC, DIP Pins 7-9, 11-14 VCC = 5.5V, VIN = VCC or GND, Outputs Open VOL II IBHH IO Output Leakage Current ICCSB Standby Power Supply - 10 µA ICCOP Operating Power Supply Current - 1 mA/MHz VCC = 5.5V, Outputs Open (See Note 2) NOTES: 1. IBHH should be measured after raising the VIN on S0, S1, S2 to VCC and then lowering to valid input high level of 2.0V. 2. ICCOP = 1mA/MHz of CLK cycle time (TCLCL) Capacitance SYMBOL CIN COUT TA = +25oC PARAMETER TYPICAL UNITS TEST CONDITIONS Input Capacitance 10 pF Output Capacitance 17 pF FREQ = 1MHz, all measurements are referenced to device GND 4-337 82C88 AC Electrical Specifications VCC = 5.0V ± 10%; TA = 0oC to +70oC (C82C88); TA = -40oC to +85oC (I82C88); TA = -55oC to +125oC (M82C88) 8MHz SYMBOL PARAMETER MIN 10MHz MAX MIN 12MHz MAX MIN MAX TEST UNITS CONDITIONS TIMING REQUIREMENTS (1) TCLCL CLK Cycle Period 125 - 100 - 83 - ns (2) TCLCH CLK Low Time 55 - 50 - 34 - ns (3) TCHCL CLK High Time 40 - 37 - 34 - ns (4) TSVCH Status Active Setup Time 35 - 35 - 35 - ns (5) TCHSV Status Inactive Hold Time 10 - 10 - 5 - ns (6) TSHCL Status Inactive Setup Time 35 - 35 - 35 - ns (7) TCLSH Status Active Hold Time 10 - 10 - 5 - ns TIMING RESPONSES (8) TCVNV Control Active Delay 5 45 5 45 5 45 ns 1 (9) TCVNX Control Inactive Delay 10 45 10 45 10 35 ns 1 (10) TCLLH ALE Active Delay (from CLK) - 20 - 20 - 20 ns 1 (11) TCLMCH MCE Active Delay (from CLK) - 25 - 23 - 23 ns 1 (12) TSVLH ALE Active Delay (from Status) - 20 - 20 - 20 ns 1 (13) TSVMCH MCE Active Delay (from Status) - 30 - 23 - 23 ns 1 (14) TCHLL ALE Inactive Delay 4 18 4 18 4 18 ns 1 (15) TCLML Command Active Delay 5 35 5 35 5 35 ns 2 (16) TCLMH Command Inactive Delay 5 35 5 35 5 35 ns 2 (17) TCHDTL Direction Control Active Delay - 50 - 50 - 50 ns 1 (18) TCHDTH Direction Control Inactive Delay - 30 - 30 - 30 ns 1 (19) TAELCH Command Enable Time (Note 1) - 40 - 40 - 40 ns 3 (20) TAEHCZ Command Disable Time (Note 2) - 40 - 40 - 40 ns 4 (21) TAELCV Enable Delay Time 110 250 110 250 110 250 ns 2 (22) TAEVNV AEN to DEN - 25 - 25 - 25 ns 1 (23) TCEVNV CEN to DEN, PDEN - 25 - 25 - 25 ns 1 (24) TCELRH CEN to Command - TCLML +10 - TCLML - TCLML ns 2 (25) TLHLL ALE High Time TCLCH 10 - TCLCH 10 - TCLCH 10 n ns 1 NOTES: 1. TAELCH measurement is between 1.5V and 2.5V. 2. TAEHCZ measured at 0.5V change in VOUT. AC Testing Input, Output Waveform A.C. Test Circuit V1 INPUT VIH +0.4V 1.5V VIL -0.4V OUTPUT VOH R1 OUTPUT FROM DEVICE UNDER TEST 1.5V VOL TEST POINT C1 (SEE NOTE) NOTE: INCLUDES STRAY AND JIG CAPACITANCE A.C. Testing: All input signals (other than CLK) must switch between VIL -0.4V and VIH +0.4. CLK must switch between 0.4V and VCC -0.4V. Input rise and fall times are driven at 1ns/V. 4-338 TABLE 2. TEST CONDITION DEFINITION TABLE TEST CONDITION 1 2 3 4 V1 2.13V 2.29V 1.5V 1.5V R1 220Ω 91Ω 187Ω 187Ω C1 80pF 300pF 300pF 50pF 82C88 Timing Waveforms (Note 3) STATE T4 T1 T2 TCLCL (1) T4 TCLCH (2) CLK TCHSV (5) T3 TSVCH (4) TCHCL (3) TSHCL (6) TCLSH (7) S2, S1, S0 ADDRESS VALID ADDRESS/DATA WRITE 1 DATA VALID TCHLL (14) TCLLH (10) TSVLH (12) 2 ALE TCLMH (16) MRDC, IORC, INTA, AMWC, AIOWC TCLML (15) TCLML (15) MWTC, IOWC TCVNV (8) DEN (READ) (INTA) TCVNX (9) PDEN (READ) (INTA) TCVNV (8) DEN (WRITE) TCVNX (9) PDEN (WRITE) TCHDTH (18) DT/R (READ) (INTA) TCHDTL (17) TCHDTH (18) 2 MCE TCLMCH (11) TSVMCH (13) TCVNX (9) NOTES: 1. Address/Data Bus is shown only for reference purposes. 2. Leading edge of ALE and MCE is determined by the falling edge of CLK or status going active. Whichever occurs last. 3. All timing measurements are made at 1.5V unless otherwise specified. FIGURE 1. 4-339 82C88 Timing Waveforms (Note 3) (Continued) CEN AEN TAEVNV (22) DEN TCEVNV (23) PDEN FIGURE 2. DEN, PDEN QUALIFICATION TIMING TAELCV (21) AEN 1.5V 1.5V TAELCH (19) TAEHCZ (20) VOH 0.5V VOH OUTPUT COMMAND TCELRH (24) CEN TCELRH (24) CEN MUST BE LOW OR INVALID PRIOR TO T2 TO PREVENT THE COMMAND FROM BEING GENERATED. FIGURE 3. ADDRESS ENABLE (AEN) TIMING (THREE-STATE ENABLE/DISABLE) NOTES: 1. Address/Data Bus is shown only for reference purposes. 2. Leading edge of ALE and MCE is determined by the falling edge of CLK or status going active. Whichever occurs last. 3. All timing measurements are made at 1.5V unless otherwise specified. 4-340 82C88 Burn-In Circuits MD82C88 CERDIP R1 20 1 F7 VCC R2 R1 2 F0 19 F4 R2 R2 F3 3 18 F2 A 4 17 A 5 16 A A R1 R1 F5 6 15 F6 A 7 14 A A 8 13 A A 9 12 A VCC 10 11 A VCC R3 A R3 C1 MR82C88 CLCC F3 F0 F7 VCC F4 R4 R1 3 2 R1 1 R4 20 19 R2 R4 F2 18 4 VCC/ 2 R4 R4 VCC/ 2 17 5 VCC/ 2 R4 R1 VCC/ 2 16 6 F5 R1 R4 F6 15 7 VCC/ 2 R4 R4 14 8 VCC/ 2 9 10 R4 11 12 R4 R4 R4 C1 VCC VCC/ 2 13 VCC/ 2 NOTES: 1. VCC = 5.5V ± 0.5V GND = 0V 2. VIH = 4.5V ± 10% VIL = -0.2V to +0.4V 3. Component Values: R1 = 47kΩ, 1/4W, 5% R2 = 1.5kΩ, 1/4W, 5% R3 = 10kΩ, 1/4W, 5% R4 = 1.2kΩ, 1/4W, 5% C1 = 0.01µF (Min) F0 = 100kHz ± 10% F1 = F0/2 F2 = F1/2 . . . F7 = F6/2 4-341 VCC/ 2 82C88 Die Characteristics DIE DIMENSIONS: 103.5 x 116.5 x 19 ± 1mils GLASSIVATION: Type: Nitrox Thickness: 10kÅ METALLIZATION: Type: Si - Al Thickness: 11kÅ ± 2kÅ WORST CASE CURRENT DENSITY: 1.9 x 105 A/cm2 Metallization Mask Layout 82C88 S1 CLK IOB VCC S0 S2 DT/R MCE/ PDEN ALE DEN AEN CEN MRDC INTA AMWC MWTC GND IOWC AIOWC IORC All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification. Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see web site http://www.intersil.com Sales Office Headquarters NORTH AMERICA Intersil Corporation P. O. Box 883, Mail Stop 53-204 Melbourne, FL 32902 TEL: (407) 724-7000 FAX: (407) 724-7240 EUROPE Intersil SA Mercure Center 100, Rue de la Fusee 1130 Brussels, Belgium TEL: (32) 2.724.2111 FAX: (32) 2.724.22.05 4-342 ASIA Intersil (Taiwan) Ltd. Taiwan Limited 7F-6, No. 101 Fu Hsing North Road Taipei, Taiwan Republic of China TEL: (886) 2 2716 9310 FAX: (886) 2 2715 3029