IDT79RC4640™ Low-Cost Embedded 64-bit RISController w/ DSP Capability Features Low-power operation – Active power management powers-down inactive units – Standby mode ◆ Large, efficient on-chip caches – Separate 8KB Instruction and 8KB Data caches – Over 3200MB/sec bandwidth from internal caches – 2-set associative – Write-back and write-through support – Cache locking, to facilitate deterministic response – High performance write protocols, for graphics and data communications ◆ Bus compatible with RC4000 family – System interfaces to 125MHz, provides bandwidth up to 500 MB/sec – Direct interface to 32-bit wide systems – Synchronized to external reference clock for multi- master operation – Socket compatible with IDT RC 64474 and RC64574 ◆ Improved real-time support – Fast interrupt decode – Optional cache locking ◆ High-performance embedded 64-bit microprocessor – 64-bit integer operations – 64-bit registers – Based on the MIPS RISC Architecture – 100MHz, 133MHz, 150MHz, 180MHz, 200MHz and 267MHz operating frequencies – 32-bit bus interface brings 64-bit power to 32-bit system cost ◆ High-performance DSP capability – 133.5 Million Integer Mul-Accumulate operations/sec @267MHz – 89 MFlops floating-point operations @267MHz ◆ High-performance microprocessor – 133.5 M Mul-Add/second @267MHz – 89 MFlops @267MHz – >640,000 dhrystone (2.1)/sec capability @267MHz (352 dhrystone MIPS) ◆ High level of integration – 64-bit, 267 MHz integer CPU – 8KB instruction cache; 8KB data cache – Integer multiply unit with 133.5M Mul-Add/sec ◆ Upwardly software compatible with IDT RISController Family ◆ Easily upgradable to 64-bit system ◆ Note: “R” refers to 5V parts; “RV” refers to 3.3V parts; “RC” refers to both Block Diagram System Control Coprocessor 267 MHz 64-bit CPU 89 MFlops Single-Precision FPA Address Translation/ Cache Attribute Control 64-bit Register File FP Register File Store Aligner Logic Unit Pipeline Control Pipeline Control 64-bit Adder Load Aligner Exception Management Functions High-Performance Integer Multiply Pack/Unpack FP Add/Sub/Cvt/ Div/Sqrt FP Multiply Control Bus Data Bus Instruction Bus Instruction Cache Set A (Lockable) Instruction Cache Set B Data Cache Set A (Lockable) 32-bit Synchronized System Interface Data Cache Set B The IDT logo is a registered trademark and RC4600, RC4650, RC3081,RC3052,RC3051,RC3041 RISController, and RISCore are trademarks of Integrated Device Technology, Inc. 1 of 23 2001 Integrated Device Technology, Inc. April 10, 2001 DSC 3486/2 IDT79RC4640™ Description The IDT79RC4640 is a low-cost member of the Integrated Device Technology, Inc. RC4000 family, targeted to a variety of performancehungry embedded applications. The RC4640 continues the RC4000 tradition of high-performance through high-speed pipelines, high-bandwidth caches and bus interface, 64-bit architecture, and careful attention to efficient control. The cost of this performance is reduced by removing functional units frequently not required for many embedded applications. The RC4640 supports a wide variety of embedded processor-based applications, such as internetworking equipment (routers, switches), office automation equipment (printers, scanners), and consumer multimedia game systems. Also, being upwardly software-compatible with the RC32300 family as well as bus- and upwardly software-compatible with the IDT RC4000 family, the RC4640 will serve in many of the same applications. And, the RC4640 supports applications that require integer digital signal processing (DSP) functions. The RC64475 and RC64575 processors offer a direct migration path for designs based on IDT’s RC4650 processors, through full pin and socket compatibility. The RC4640 brings 64-bit performance levels to lower cost systems. High performance is preserved by retaining large on-chip two-way setassociative caches, a streamlined high-speed pipeline, high bandwidth, 64-bit execution, and facilities such as early restart for data cache misses. These techniques allow the system designer over 3.2 GB/sec aggregate internal bandwidth, 500 MB/sec bus bandwidth, almost 352 Dhrystone MIPS, 89MFlops, and 133.5 M Mul-Add/sec. An array of tools facilitates rapid development of RC4640-based systems, allowing a wide variety of customers access to the processor’s high-performance capabilities while maintaining short time-to-market goals. Hardware Overview Some key elements of the RC4640 are briefly described below. More detailed information is available in the IDT79RC4640/IDT79RC4650 RISC Processor Hardware User’s Manual. Pipeline The RC4640 uses a 5-stage pipeline that is similar to the IDT79RC3000 and the IDT79RC4700 processors. The simplicity of this pipeline allows the RC4640 to cost less than super-scalar processors and require less power than super-pipelined processors. So, unlike superscalar processors, applications that have large data dependencies, or require frequent load/stores, can still achieve peak performance. The extensions result in better code density, greater multiprocessing support, improved performance for commonly used code sequences in operating system kernels, and faster execution of floatingpoint intensive applications. All resource dependencies are made transparent to the programmer, insuring transportability among implementations of the MIPS instruction set architecture. In addition, MIPS-III specifies new instructions defined to take advantage of the 64-bit architecture of the processor. Finally, the RC4640 also implements additional instructions, which are considered extensions to the MIPS-III architecture. These instructions improve the multiply and multiply-add throughput of the CPU, making it well suited to a wide variety of imaging and DSP applications. These extensions, which use opcodes allocated by MIPS Technologies for this purpose, are supported by a wide variety of development tools. The MIPS integer unit implements a load/store architecture with single cycle ALU operations (logical, shift, add, sub) and autonomous multiply/divide unit. The 64-bit register resources include: 32 generalpurpose orthogonal integer registers, the HI/LO result registers for the integer multiply/divide unit, and the program counter. In addition, the onchip floating-point co-processor adds 32 floating-point registers, and a floating-point control/status register. Register File The RC4640 has 32 general-purpose 64-bit registers. These registers are used for scalar integer operations and address calculation. The register file consists of two read ports and one write port and is fully bypassed to minimize operation latency in the pipeline. Arithmetic Logic Unit The RC4640 ALU consists of the integer adder and logic unit. The adder performs address calculations in addition to arithmetic operations; the logic unit performs all of the logic and shift operations. Each unit is highly optimized and can perform an operation in a single pipeline cycle. Integer Multiply/Divide The RC4640 uses a dedicated integer multiply/divide unit, optimized for high-speed multiply and multiply-accumulate operation. Table 1 shows the performance, expressed in terms of pipeline clocks, achieved by the RC4640 integer multiply unit. Operand Size Latency Repeat Stall 16 bit 3 2 0 32 bit 4 3 0 16 bit 3 2 1 32 bit 4 3 2 DMULT, DMULTU any 6 5 0 DIV, DIVU any 36 36 0 DDIV, DDIVU any 68 68 0 Opcode MULT/U, MAD/U MUL Integer Execution Engine The RC4640 implements the MIPS-III Instruction Set Architecture and is fully upward compatible with applications that run on earlier generation parts. The RC4640 is software-compatible with the RC4650, and includes the instruction set found in the RC4700 microprocessor, targeted at higher performance while maintaining binary compatibility with RC32300 processors. 2 of 23 Table 1 RC4640 Integer Multiply Operation April 10, 2001 IDT79RC4640™ The MIPS-III architecture defines that the results of a multiply or divide operation are placed in the HI and LO registers. The values can then be transferred to the general purpose register file using the MFHI/ MFLO instructions. The RC4640 adds a new multiply instruction, “MUL”, which can specify that the multiply results bypass the “Lo” register and are placed immediately in the primary register file. By avoiding the explicit “Movefrom-Lo” instruction required when using “Lo”, throughput of multiplyintensive operations is increased. An additional enhancement offered by the RC4640 is an atomic “multiply-add” operation, MAD, used to perform multiply-accumulate operations. This instruction multiplies two numbers and adds the product to the current contents of the HI and LO registers. This operation is used in numerous DSP algorithms, and allows the RC4640 to cost reduce systems requiring a mix of DSP and control functions. As in the IDT79RC4700, the RC4640 maintains fully precise floatingpoint exceptions while allowing both overlapped and pipelined operations. Precise exceptions are extremely important in mission-critical environments, such as ADA, and highly desirable for debugging in any environment. The floating-point unit’s operation set includes floating-point add, subtract, multiply, divide, square root, conversion between fixed-point and floating-point format, conversion among floating-point formats, and floating-point compare. These operations comply with IEEE Standard 754. Double precision operations are not directly supported; attempts to execute double-precision floating point operations, or refer directly to double-precision registers, result in the RC4640 signalling a “trap” to the CPU, enabling emulation of the requested function. Table 2 gives the latencies of some of the floating-point instructions in internal processor cycles. Finally, aggressive implementation techniques feature low latency for these operations along with pipelining to allow new operations to be issued before a previous one has fully completed. Table 1 also shows the repeat rate (peak issue rate), latency, and number of processor stalls required for the various operations. The RC4640 performs automatic operand size detection to determine the size of the operand, and implements hardware interlocks to prevent overrun, allowing this high-performance to be achieved with simple programming. ADD 4 SUB 4 MUL 8 DIV 32 Floating-Point Coprocessor SQRT 31 The RC4640 incorporates an entire single-precision floating-point coprocessor on chip, including a floating-point register file and execution units. The floating-point coprocessor forms a “seamless” interface with the integer unit, decoding and executing instructions in parallel with the integer unit. CMP 3 FIX 4 FLOAT 6 ABS 1 The floating-point unit of the RC4640 directly implements singleprecision floating-point operations, which enables the RC4640 to perform functions such as graphics rendering without requiring extensive die area or power consumption. The single-precision unit of the RC4640 is directly compatible with the single-precision operation of the RC4700, and features the same latencies and repeat rates. MOV 1 NEG 1 LWC1 2 SWC1 1 The RC4640 does not directly implement the double-precision operations found in the RC4700. However, to maintain software compatibility, the RC4640 will signal a trap when a double-precision operation is initiated, allowing the requested function to be emulated in software. Alternatively, the system architect could use a software library emulation of double-precision functions, selected at compile time, to eliminate the overhead associated with trap and emulation. Floating-Point Units The RC4640’s floating-point execution units perform single precision arithmetic, as specified in IEEE Standard 754. The execution unit is broken into a separate multiply unit and a combined add/convert/divide/ square root unit. Overlap of multiply and add/subtract is supported. The multiplier is partially pipelined, allowing a new multiplication instruction to begin every 6 cycles. Instruction Latency Operation Table 2 Floating-Point Operation Floating-Point General Register File The floating-point register file is made up of thirty-two 32-bit registers. These registers are used as source or target registers for the single-precision operations. References to these registers as 64-bit registers (as supported in the RC4700) will cause a trap to be signalled to the integer unit. The floating-point control register space contains two registers; one for determining configuration and revision information for the coprocessor and one for control and status information. These are primarily involved with diagnostic software, exception handling, state saving and restoring, and control of rounding modes. 3 of 23 April 10, 2001 IDT79RC4640™ System Control Coprocessor (CP0) Operation Modes The system control coprocessor in the MIPS architecture is responsible for the virtual to physical address translation and cache protocols, the exception control system, and the diagnostics capability of the processor. In the MIPS architecture, the system control coprocessor (and thus the kernel software) is implementation dependent. The RC4640 supports two modes of operation: user mode and kernel mode. Kernel mode operation is typically used for exception handling and operating system kernel functions, including CP0 management and access to IO devices. In kernel mode, software has access to the entire address space and all of the co-processor 0 registers, and can select whether to enable co-processor 1 accesses. The processor enters kernel mode at reset, and whenever an exception is recognized. In the RC4640, significant changes in CP0 relative to the RC4600 have been implemented. These changes are designed to simplify memory management, facilitate debug, and speed real-time processing. System Control Coprocessor Registers User mode is typically used for applications programs. User mode accesses are limited to a subset of the virtual address space, and can be inhibited from accessing CP0 functions. The RC4640 incorporates all system control co-processor (CP0) registers on-chip. These registers provide the path through which the virtual memory system’s address translation is controlled, exceptions are handled, and operating modes are controlled (kernel vs. user mode, interrupts enabled or disabled, cache features). In addition, the RC4640 includes registers to implement a real-time cycle counting facility, which aids in cache diagnostic testing, assists in data error detection, and facilitates software debug. Alternatively, this timer can be used as the operating system reference timer, and can signal a periodic interrupt. 0xFFFFFFFF Kernel virtual address space (kseg2) Unmapped, 1.0 GB 0xC0000000 0xBFFFFFFF Uncached kernel physical address space (kseg1) Unmapped, 0.5GB Table 3 shows the CP0 registers of the RC4640. Number Name Function 0xA0000000 0 IBase Instruction address space base 1 IBound Instruction address space bound 2 DBase Data address space base 3 DBound Data address space bound 0x80000000 4-7, 10, 20-25, 29, 31 Not used 0x7FFFFFF 8 BadVAddr Virtual address on address exceptions 9 Count Counts every other cycle 11 Compare Generate interrupt when Count = Compare 12 Status Miscellaneous control/status 13 Cause Exception/Interrupt information 14 EPC Exception PC 15 PRId Processor ID 16 Config Cache and system attributes 17 CAlg Cache attributes for the 8 512MB regions of the virtual address space 18 IWatch Instruction breakpoint virtual address 19 DWatch Data breakpoint virtual address 26 ECC Used in cache diagnostics 27 CacheErr Cache diagnostic information 28 TagLo Cache index information 30 ErrorEPC CacheError exception PC Table 3 RC4640 CPO Registers 0x9FFFFFFF Cached kernel physical address space (kseg0) Unmapped, 0.5GB User virtual address space (useg) Mapped, 2.0GB 0x00000000 Figure 1 Mode Virtual Addressing (32-bit mode) Virtual-to-Physical Address Mapping The 4GB virtual address space of the RC4640 is shown in Figure 1. The 4 GB address space is divided into addresses accessible in either kernel or user mode (kuseg), and addresses only accessible in kernel mode (kseg2:0). The RC4640 supports the use of multiple user tasks sharing common virtual addresses, but mapped to separate physical addresses. This facility is implemented via the “base-bounds” registers contained in CP0. When a user virtual address is asserted (load, store, or instruction fetch), the RC4640 compares the virtual address with the contents of the appropriate “bounds” register (instruction or data). If the virtual 4 of 23 April 10, 2001 IDT79RC4640™ address is “in bounds”, the value of the corresponding “base” register is added to the virtual address to form the physical address for that reference. If the address is not within bounds, an exception is signalled. This facility enables multiple user processes in a single physical memory without the use of a TLB. This type of operation is further supported by a number of development tools for the RC4640, including real-time operating systems and “position independent code”. Kernel mode addresses do not use the base-bounds registers, but rather undergo a fixed virtual-to-physical address translation. Debug Support To facilitate software debug, the RC4640 adds a pair of “watch” registers to CP0. When enabled, these registers will cause the CPU to take an exception when a “watched” address is appropriately accessed. In addition, the contents of one set of the instruction cache (set “A”) can be “locked” by setting a bit in a CP0 register. Locking the set prevents its contents from being overwritten by a subsequent cache miss; refill occurs then only into “set B”. This operation effectively “locks” time critical code into one 4kB set, while allowing the other set to service other instruction streams in a normal fashion. Thus, the benefits of cached performance are achieved, while deterministic real-time response is preserved. Data Cache For fast, single cycle data access, the RC4640 includes an 8KB onchip data cache that is two-way set associative with a fixed 32-byte (eight words) line size. Table 4 lists the RC4640 cache attributes. Characteristics Interrupt Vector The RC4640 also adds the capability to speed interrupt exception decoding. Unlike the RC4700, which utilizes a single common exception vector for all exception types (including interrupts), the RC4640 allows kernel software to enable a separate interrupt exception vector. When enabled, this vector location speeds interrupt processing by allowing software to avoid decoding interrupts from general purpose exceptions. Cache Memory To keep the RC4640’s high-performance pipeline full and operating efficiently, the RC4640 incorporates on-chip instruction and data caches that can each be accessed in a single processor cycle. Each cache has its own 64-bit data path and can be accessed in parallel. The cache subsystem provides the integer and floating-point units with an aggregate bandwidth of over 3200 MB per second at a pipeline clock frequency of 267MHz. The cache subsystem is similar in construction to that found in the RC4700, although some changes have been implemented. Table 4 is an overview of the caches found on the RC4640. Instruction Cache The RC4640 incorporates a two-way set associative on-chip instruction cache. This virtually indexed, physically tagged cache is 8KB in size and is parity protected. Because the cache is virtually indexed, the virtual-to-physical address translation occurs in parallel with the cache access, thus further increasing performance by allowing these two operations to occur simultaneously. The tag holds a 20-bit physical address and valid bit, and is parity protected. The instruction cache is 64-bits wide, and can be refilled or accessed in a single processor cycle. Instruction fetches require only 32 bits per cycle, for a peak instruction bandwidth of 1068MB/sec at 267MHz. Sequential accesses take advantage of the 64-bit fetch to reduce power dissipation, and cache miss refill, can write 64 bits-per-cycle to minimize the cache miss penalty. The line size is eight instructions (32 bytes) to maximize performance. Instruction Data Size 8KB 8KB Organization 2-way set associative 2-way set associative Line size 32B 32B Index vAddr11..0 vAddr11..0 Tag pAddr31..12 pAddr31..12 Write policy n.a. writeback /writethru Line transfer order read sub-block order read sub-block order write sequential write sequential Miss restart after transfer of entire line first word Parity per-word per-byte Cache locking set A set A Table 4 RC4640 Cache Attributes The data cache is protected with byte parity and its tag is protected with a single parity bit. It is virtually indexed and physically tagged to allow simultaneous address translation and data cache access The normal write policy is writeback, which means that a store to a cache line does not immediately cause memory to be updated. This increases system performance by reducing bus traffic and eliminating the bottleneck of waiting for each store operation to finish before issuing a subsequent memory operation. Software can however select writethrough for certain address ranges, using the CAlg register in CP0. Cache protocols supported for the data cache are: ◆ Uncached. Addresses in a memory area indicated as uncached will not be read from the cache. Stores to such addresses will be written directly to main memory, without changing cache contents. ◆ Writeback. Loads and instruction fetches will first search the cache, reading main memory only if the desired data is not cache resident. On data store operations, the cache is first searched to see if the target address is cache resident. If it is resident, the cache con- 5 of 23 April 10, 2001 IDT79RC4640™ ◆ ◆ tents will be updated, and the cache line marked for later writeback. If the cache lookup misses, the target line is first brought into the cache before the cache is updated. Write-through with write allocate. Loads and instruction fetches will first search the cache, reading main memory only if the desired data is not cache resident. On data store operations, the cache is first searched to see if the target address is cache resident. If it is resident, the cache contents will be updated and main memory will also be written; the state of the “writeback” bit of the cache line will be unchanged. If the cache lookup misses, the target line is first brought into the cache before the cache is updated. Write-through without write-allocate. Loads and instruction fetches will first search the cache, reading main memory only if the desired data is not cache resident. On data store operations, the cache is first searched to see if the target address is cache resident. If it is resident, the cache contents will be updated, and the cache line marked for later writeback. If the cache lookup misses, then only main memory is written. Associated with the Data Cache is the store buffer. When the RC4640 executes a Store instruction, this single-entry buffer gets written with the store data while the tag comparison is performed. If the tag matches, then the data is written into the Data Cache in the next cycle that the Data Cache is not accessed (the next non-load cycle). The store buffer allows the RC4640 to execute a store every processor cycle and to perform back-to-back stores without penalty. Write Buffer Writes to external memory, whether cache miss writebacks or stores to uncached or write-through addresses, use the on-chip write buffer. The write buffer holds up to four address and data pairs. The entire buffer is used for a data cache writeback and allows the processor to proceed in parallel with memory update. System Interface The RC4640 supports a 32-bit system interface that is syntactically compatible with the RC4700 system interface. The interface consists of a 32-bit Address/Data bus with eight check bits and a 9-bit command bus protected with parity. In addition, there are eight handshake signals and six interrupt inputs. The interface has a simple timing specification and is capable of transferring data between the processor and memory at a peak rate of 500MB/sec at 125MHz on the bus. Figure 2 on page 7 shows a typical system using the RC4640. In this example two banks of DRAMs are used to supply and accept data with a DDxxDD data pattern. An on-chip phase-locked-loop generates the pipeline clock from the system interface clock by multiplying it up an amount selected at system reset. Supported multipliers are values 2 through 8 inclusive, allowing systems to implement pipeline clocks at significantly higher frequency than the system interface clock. System Address/Data Bus The 64-bit System Address Data (SysAD) bus is used to transfer addresses and data between the RC4640 and the rest of the system. It is protected with an 8-bit parity check bus, SysADC. When initialized for 32-bit operation, SysAD can be viewed as a 32-bit multiplexed bus, with 4 parity check bits. The system interface is configurable to allow easier interfacing to memory and I/O systems of varying frequencies. The bus frequency and reference timing of the RC4640 are taken from the input clock. The rate at which the CPU transmits data to the system interface is programmable via boot time mode control bits. The rate at which the processor receives data is fully controlled by the external device. Therefore, either a low cost interface requiring no read or write buffering or a faster, high performance interface can be designed to communicate with the RC4640. Again, the system designer has the flexibility to make these price/performance trade-offs. System Command Bus The RC4640 interface has a 9-bit System Command (SysCmd) bus. The command bus indicates whether the SysAD bus carries an address or data. If the SysAD carries an address, then the SysCmd bus also indicates what type of transaction is to take place (for example, a read or write). If the SysAD carries data, then the SysCmd bus also gives information about the data (for example, this is the last data word transmitted, or the cache state of this data line is clean exclusive). The SysCmd bus is bidirectional to support both processor requests and external requests to the RC4640. Processor requests are initiated by the RC4640 and responded to by an external device. External requests are issued by an external device and require the RC4640 to respond. The RC4640 supports single datum (one to eight byte) and 8-word block transfers on the SysAD bus. In the case of a single-datum transfer, the low-order 3 address bits gives the byte address of the transfer, and the SysCmd bus indicates the number of bytes being transferred. Handshake Signals There are six handshake signals on the system interface. Two of these, RdRdy* and WrRdy* are used by an external device to indicate to the RC4640 whether it can accept a new read or write transaction. The RC4640 samples these signals before deasserting the address on read and write requests. The RC4640 clocking interface allows the CPU to be easily mated with external reference clocks. The CPU input clock is the bus reference clock, and can be between 50 and 125MHz (somewhat dependent on maximum pipeline speed for the CPU). 6 of 23 The following is a list of the supported external requests: ◆ Read Response ◆ Null April 10, 2001 IDT79RC4640™ Boot-Time Options ExtRqst* and Release* are used to transfer control of the SysAD and SysCmd buses between the processor and an external device. When an external device needs to control the interface, it asserts ExtRqst*. The RC4640 responds by asserting Release* to release the system interface to slave state. ValidOut* and ValidIn* are used by the RC4640 and the external device respectively to indicate that there is a valid command or data on the SysAD and SysCmd buses. The RC4640 asserts ValidOut* when it is driving these buses with a valid command or data, and the external device drives ValidIn* when it has control of the buses and is driving a valid command or data. Non-overlapping System Interface The RC4640 requires a non-overlapping system interface, compatible with the RC4700. This means that only one processor request may be outstanding at a time and that the request must be serviced by an external device before the RC4640 issues another request. The RC4640 can issue read and write requests to an external device, and an external device can issue read and write requests to the RC4640. The RC4640 asserts ValidOut* and simultaneously drives the address and read command on the SysAD and SysCmd buses. If the system interface has RdRdy* or Read transactions asserted, then the processor tristates its drivers and releases the system interface to slave state by asserting Release*. The external device can then begin sending the data to the RC4640. Fundamental operational modes for the processor are initialized by the boot-time mode control interface. The boot-time mode control interface is a serial interface operating at a very low frequency (MasterClock divided by 256). The low-frequency operation allows the initialization information to be kept in a low-cost EPROM; alternatively the twenty-orso bits could be generated by the system interface ASIC or a simple PAL. Immediately after the VCCOK Signal is asserted, the processor reads a serial bit stream of 256 bits to initialize all fundamental operational modes. After initialization is complete, the processor continues to drive the serial clock output, but no further initialization bits are read. Boot-Time Modes The boot-time serial mode stream is defined in Table 6. Bit 0 is the bit presented to the processor when VCCOK is asserted; bit 255 is the last. Power Management CP0 is also used to control the power management for the RC4640. This is the standby mode and it can be used to reduce the power consumption of the internal core of the CPU. The standby mode is entered by executing the WAIT instruction with the SysAD bus idle and is exited by any interrupt. Standby Mode Operation The RC4640 provides a means to reduce the amount of power consumed by the internal core when the CPU would otherwise not be performing any useful operations. This is known as “Standby Mode”. Entering Standby Mode Executing the WAIT instruction enables interrupts and enters Standby mode. When the WAIT instruction finishes the W pipe-stage, if the SysAd bus is currently idle, the internal clocks will shut down, thus freezing the pipeline. The PLL, internal timer, and some of the input pins (Int[5:0]*, NMI*, ExtReq*, Reset*, and ColdReset*) will continue to run. Address Boot ROM DRAM (80ns) Control SCSI Memory I/O Controller 32 RV4640 ENET 9 2 11 Figure 2 Typical RC4640 System Architecture 7 of 23 April 10, 2001 IDT79RC4640™ If the conditions are not correct when the WAIT instruction finishes the W pipe-stage (i.e. the SysAd bus is not idle), the WAIT is treated as a NOP. temperature parts. The type of package, speed (power) of the device, and air flow conditions affect the equivalent ambient temperature conditions that will meet this specification. Once the CPU is in Standby Mode, any interrupt, including the internally generated timer interrupt, will cause the CPU to exit Standby Mode. The equivalent allowable ambient temperature, TA, can be calculated using the thermal resistance from case to ambient (∅CA) of the given package. The following equation relates ambient and case temperatures: Thermal Considerations TA = TC - P * ∅CA The RC4640 utilizes special packaging techniques to improve the thermal properties of high-speed processors. The RV4640 is packaged using cavity-up packaging in a 128-pin thermally enhanced PQFP package (“DU”) with a drop-in heat spreader, for devices with low peak power. The R4640 utilizes the PQFP package for higher power consumption devices (the “DZ” package), which is an all-aluminum package with the die attached to a normal copper lead frame mounted to the aluminum casing. Due to the heat-spreading effect of the aluminum, the PQFP package allows for an efficient thermal transfer between the die and the case. The aluminum offers less internal resistance from one end of the package to the other, reducing the temperature gradient across the package and therefore presenting a greater area for convection and conduction to the PCB for a given temperature. Even nominal amounts of air flow will dramatically reduce the junction temperature of the die, resulting in cooler operation. The PQFP package is pin and socket compatible with the 128-pin QFP package. where P is the maximum power consumption at hot temperature, calculated by using the maximum ICC specification for the device. Typical values for ∅CA at various air flows are shown in Table 5. ∅CA Airflow (ft/min) 0 200 400 600 800 1000 128 PQFP (DU) 17 9 7 5 4 3 128 PQFP (DZ) 20 12 9.5 8 7 6.5 Table 5 Thermal Resistance (∅CA) at Various Airflows Note that the RC4640 implements advanced power management to substantially reduce the average power dissipation of the device. This operation is described in the IDT79RC4640/ IDT79RC4650 RISC Processor Hardware User’s Manual. The R4640 and the RV4640 are guaranteed in a case temperature range of 0°C to +85°C for commercial temperature parts and the RV4640 in a case temperature range of -40°C to +85°C for industrial MasterClock SysAD Addr Data0 Data1 Data6 Data7 SysCmd Read CData CData CData CEOD ValidOut ValidIn RdRdy WrRdy Release Figure 3 RC4640 Block Read Request 8 of 23 April 10, 2001 IDT79RC4640™ Data Sheet Revision History Changes to version dated March 1998: Features: – Added 200MHz operating frequency Changes to version dated December 1995: Features: – Added 32-bit bus interface info – Deleted items from low-power operation descriptions. Changes to version dated April 1998: Hardware Overview: – Added detailed descriptions of features. – Changed Boot Time Mode Stream table values for mode bit 12. Features: – Added 400MB/sec bandwidth reference Power Consumption (RV4640): – Upgraded System Condition Icc active parameters DC Electrical Characteristics: – The CIN and COUT values have been changed. Changes to version dated July 1999: – Corrected several incorrect references to tables and figures. AC Electrical Characteristics: – In System Interface Parameters tables (RC4640 and RV4640), Data Setup and Data Hold minimums changed. Changes to version dated March 2000 – Replaced existing figure in Mode Configuration Interface Reset Sequence section with 3 reset figures. – Revised values in System Interface Parameters table. Valid Combinations: – List of valid combinations has been corrected. Features: – Added preliminary 150 MHz operation frequency Changes to version dated July 2000 – Revised package information in the Thermal Considerations section, Physical Specifications section, Ordering Information section, and the Valid Combinations section. Thermal Considerations: – Added thermally enhanced packaging (“DU”) and drop-in heat spreader information. – Upgraded 80 to 133MHz speed grade specs to “final.” Changes to version dated April 2001 2001 – In the Data Output and Data Output Hold categories of the System Interface Parameters tables, changed values in the Min column for all speeds from 1.0 and 2.0 to 0. Changes to version dated March 1997: Changes to version dated May 1997: Features: – Added 180 MHz spreader information – Eliminated 80 MHz MasterClock SysAD Addr Data0 Data1 Data6 Data7 SysCmd Write CData CData CData CEOD ValidOut ValidIn RdRdy WrRdy Release Figure 4 RC4640 Block Write Request 9 of 23 April 10, 2001 IDT79RC4640™ Mode bit Description 0 Reserved (must be zero) 4s:1 Writeback data rate: 32-bit 0→Ω 1 → WWx 2 → WWxx 3 → WxWx 4 → WWxxx 5 → WWxxxx 6 → WxxWxx 7 → WWxxxxxx 8 → WxxxWxxx 9-15 reserved 7:5 Clock multiplier: 0→2 1→3 2→4 3→5 4→6 5→7 6→8 7 reserved 8 0 → Little endian 1 → Big endian 10:9 00 → R4000 compatible 01 → reserved 10 → pipelined writes 11 → write re-issue 11 Disable the timer interrupt on Int[5] 12 Must be 1 14:13 Output driver strength: 10 → 100% strength (fastest) 11 → 83% strength 00 → 67% strength 01 → 50% strength (slowest) 255:15 Must be zero Table 6 Boot-time mode stream 10 of 23 April 10, 2001 IDT79RC4640™ Pin Description The following is a list of interface, interrupt, and miscellaneous pins available on the RC4640. Pin names ending with an asterisk (*) identify pins that are active when low. Pin Name Type Description System Bus Interface ExtRqst* Input External request Signals that the system interface needs to submit an external request. Release* Output Release interface Signals that the processor is releasing the system interface to slave state RdRdy* Input Read Ready Signals that an external agent can now accept a processor read. WrRdy* Input Write Ready Signals that an external agent can now accept a processor write request. ValidIn* Input Valid Input Signals that an external agent is now driving a valid address or data on the SysAD bus and a valid command or data identifier on the SysCmd bus. ValidOut* Output Valid output Signals that the processor is now driving a valid address or data on the SysAD bus and a valid command or data identifier on the SysCmd bus. SysAD(31:0) Input/Output System address/data bus A 32-bit address and data bus for communication between the processor and an external agent. SysADC(3:0) Input/Output System address/data check bus A 4-bit bus containing parity check bits for the SysAD bus during data bus cycles. SysCmd(8:0) Input/Output System command/data identifier bus A 9-bit bus for command and data identifier transmission between the processor and an external agent. SysCmdP Input/Output Reserved system command/data identifier bus parity For the RC4640 this signal is unused on input and zero on output. Clock/Control interface MasterClock Input Master clock Master clock input used as the system interface reference clock. All output timings are relative to this input clock. Pipeline operation frequency is derived by multiplying this clock up by the factor selected during boot initialization. VCCP Input Quiet VCC for PLL Quiet VCC for the internal phase locked loop. VSSP Input Quiet VSS for PLL Quiet VSS for the internal phase locked loop. Interrupt interface Int*(5:0) Input Interrupt Six general processor interrupts, bit-wise OR’ d with bits 5:0 of the interrupt register. NMI* Input Non-maskable interrupt Non-maskable interrupt, OR’d with bit 6 of the interrupt register. Initialization interface VCCOk Input VCC is OK When asserted, this signal indicates to the RC4640 that the power supply has been above Vcc minimum for more than 100 milliseconds and will remain stable. The assertion of VCCOk initiates the reading of the boot-time mode control serial stream. 11 of 23 April 10, 2001 IDT79RC4640™ Pin Name Type Description ColdReset* Input Cold reset This signal must be asserted for a power on reset or a cold reset. ColdReset must be de-asserted synchronously with MasterClock. Reset* Input Reset This signal must be asserted for any reset sequence. It may be asserted synchronously or asynchronously for a cold reset, or synchronously to initiate a warm reset. Reset must be de-asserted synchronously with MasterClock. ModeClock Output Boot mode clock Serial boot-mode data clock output at the system clock frequency divided by 256. ModeIn Input Boot mode data in Serial boot-mode data input. Int*(5:0) Input Interrupt Six general processor interrupts, bit-wise OR’ d with bits 5:0 of the interrupt register. NMI* Input Non-maskable interrupt Non-maskable interrupt, OR’d with bit 6 of the interrupt register. Absolute Maximum Ratings Note: 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. Symbol Rating R4640 5.0V±5% RV4640 3.3V±5% RV4640 3.3V±5% Commercial Commercial Industrial Unit VTERM Terminal Voltage with respect to GND –0.51 to +7.0 –0.51 to +4.6 –0.51 to +4.6 V TC Operating Temperature(case) 0 to +85 0 to +85 -40 to +85 °C TBIAS Case Temperature Under Bias –55 to +125 –55 to +125 –55 to +125 °C TSTG Storage Temperature –55 to +125 –55 to +125 –55 to +125 °C IIN DC Input Current 202 202 202 mA IOUT DC Output Current 503 503 503 mA 1. NVIN minimum = –2.0V for pulse width less than 15ns. VIN should not exceed VCC +0.5 Volts. 2. When VIN < 0V or VIN > VCC 3. Not more than one output should be shorted at a time. Duration of the short should not exceed 30 seconds. Recommended Operation Temperature and Supply Voltage Grade Temperature GND R4640 RV4640 VCC VCC Commercial 0°C to +85°C (Case) 0V 5.0V±5% 3.3V±5% Industrial -40°C + 85°C (Case) 0V N/A 3.3V±5% 12 of 23 April 10, 2001 IDT79RC4640™ DC Electrical Characteristics — Commercial Temperature Range—R4640 (VCC = 5.0±5%, TCASE = 0°C to +85°C) R4640 100MHz Parameter Minimum R4640 133MHz Maximum Minimum Conditions Maximum VOL — 0.1V — 0.1V VOH VCC - 0.1V — VCC - 0.1V — VOL — 0.4V — 0.4V VOH 2.4V — 2.4V — VIL –0.5V 0.2VCC –0.5V 0.2VCC — VIH 2.0V VCC + 0.5V 2.0V VCC + 0.5V — IIN — ±10uA — ±10uA 0 ≤ VIN ≤ VCC CIN — 10pF — 10pF — COUT — 10pF — 10pF — I/OLEAK — 20uA — 20uA Input/Output Leakage |IOUT| = 20uA |IOUT| = 4mA Power Consumption—R4640 Parameter R4640 100MHz Typical1 Max R4640 133MHz Typical1 Conditions Max System Condition: 100/50MHz ICC — 75 mA2 — 100 mA2 CL = 0pF3 — 150 mA2 — 200 mA2 CL = 50pF 700 mA 900 mA2 900 mA2 950 mA2 CL = 0pF No SysAd activity3 800 mA2 1000 mA2 1000 mA2 1100 mA2 CL = 50pF R4x00 compatible writes, TC = 25oC 800 mA2 1200 mA4 1000 mA2 1350 mA4 CL = 50pF Pipelined writes or write re-issue, TC = 25oC standby active, 64-bit bus option 2 133/67MHz — 1. Typical integer instruction mix and cache miss rates, Vcc = 3.3V, TA = 25×C. 2. These are not tested. They are the results of engineering analysis and are provided for reference only. 3. Guaranteed by 4. design. These are the specifications IDT tests to insure compliance. 13 of 23 April 10, 2001 IDT79RC4640™ AC Electrical Characteristics — Commercial Temperature Range—R4640 (VCC=5.0V ± 5%; TCASE = -0°C to +85°C) Clock Parameters—R4640 Parameter Symbol R4640 100MHz Test Conditions Min R4640 133MHz Max Min Units Max Pipeline clock frequency PClk — 50 100 50 133 MHz MasterClock HIGH tMCHIGH Transition ≤ tMCRise/Fall 4 — 3 — ns MasterClock LOW tMCLOW Transition ≤ tMCRise/Fall 4 — 3 — ns MasterClock Frequency1 — — 25 50 25 67 MHz MasterClock Period tMCP — 20 40 15 40 ns Clock Jitter for MasterClock tJitterIn2 — — ±250 — ±250 ps — — 5 — 4 ns — — 5 — 4 ns — — 256* tMCP — 256* tMCP ns MasterClock Rise Time tMCRise MasterClock Fall Time tMCFall ModeClock Period 2 2 tModeCKP 2 1. Operation of the RC4650 is only guaranteed with the Phase Lock Loop enabled. 2. Guaranteed by design. System Interface Parameters—R4640 (VCC=5.0V ± 5%; TCASE = 0°C to +85°C) Note: Timings are measured from 1.5V of the clock to 1.5V of the signal. Parameter Symbol R4640 100MHz Test Conditions Min Data Output1 tDO = Max Data Output Hold tDOH Input Data Setup tDS Input Data Hold tDH 1. Capacitive load 3 R4640 133MHz Max Min mode14..13 = 10 (Fastest) 02 mode14..13 = 11 (85%) 02 02 mode14..13 = 00 (66%) 02 02 mode14..13 = 01 (slowest) 02 12 mode14..13 = 10 0 mode14..13 = 11 9 02 Units Max 9 ns 02 12 ns — 0 — ns 0 — 0 — ns mode14..13 = 00 0 — 0 — ns mode14..13 = 01 0 — 0 — ns trise = 5ns tfall = 5ns 5.5 — 4.5 — ns 2 — 1.5 — ns for all output timings is 50pF. 2. Guaranteed by design. 3. 50pf loading on external output signals, fastest settings 14 of 23 April 10, 2001 IDT79RC4640™ Boot-time Interface Parameters—R4640 (VCC=5.0V ± 5%; TCASE = 0°C to +85°C) Parameter Symbol Test Conditions R4640 100MHz Min R4640 133MHz Max Min Units Max Mode Data Setup tDS — 3 — 3 — Master Clock Cycle Mode Data Hold tDH — 0 — 0 — Master Clock Cycle Capacitive Load Deration—R4650 Parameter Symbol Load Derate CLD 100MHz Test Conditions — 133MHz Min Max Min Max — 2 — 2 Units ns/25pF DC Electrical Characteristics — Commercial / Industrial Temperature Range—RV4640 (VCC = 3.3±5%, Commercial TCASE = 0°C to +85°C, Industrial TCASE = -40°C to +85°C) Parameter Parameter RV4640 133MHz RV4640 150MHz Conditions Minimum Maximum Minimum Maximum VOL — 0.1V — 0.1V VOH VCC - 0.1V — VCC - 0.1V — VOL — 0.4V — 0.4V VOH 2.4V — 2.4V — VIL –0.5V 0.2VCC –0.5V 0.2VCC VIH 0.7VCC VCC + 0.5V 0.7VCC VCC + 0.5V — IIN — ±10uA — ±10uA 0 ≤ VIN ≤ VCC CIN — 10pF — 10pF — COUT — 10pF — 10pF — I/OLEAK — 20uA — 20uA Input/Output Leakage RV4640 180MHz Minimum Maximum |IOUT| = 4mA — RV4640 267MHz1 RV4640 200MHz Minimum Maximum Minimum Maximum — 0.1V — 0.1V Conditions VOL — VOH VCC - 0.1V — VCC - 0.1V — VCC - 0.1V — VOL — 0.4V — 0.4V — 0.4V VOH 2.4V — 2.4V — 2.4V — VIL –0.5V 0.2VCC –0.5V 0.2VCC –0.5V 0.2VCC — VIH 0.7VCC VCC + 0.5V 0.7VCC VCC + 0.5V 0.7VCC VCC + 0.5V — IIN — ±10uA — ±10uA — ±10uA 0 ≤ VIN ≤ VCC CIN — 10pF — 10pF — 10pF — COUT — 10pF — 10pF — 10pF — I/OLEAK — 20uA — 20uA — 20uA Input/Output Leakage 1. 0.1V |IOUT| = 20uA |IOUT| = 20uA |IOUT| = 4mA Industrial temperature range is not available at 267MHz 15 of 23 April 10, 2001 IDT79RC4640™ Power Consumption—RV4640 RV4640 133MHz Parameter Typical1 Typical1 133/67MHz ICC — 60 mA2 — 60mA2 CL = 0pF3 — 110 mA2 — 110mA2 CL = 50pF 400 mA2 450 mA2 450 mA2 500mA2 CL = 0pF, No SysAd activity3 450 mA2 500 mA2 500mA2 550mA2 CL = 50pF R4x00 |compatible writes TC = 25oC 500 mA2 575 mA4 550mA2 625mA4 CL = 50pF Pipelined writes or Write re-issue, TC = 25oC3 standby 1. Typical integer instruction 150/75MHz — mix and cache miss rates, Vcc = 3.3V, TA = 25×C. 2. These are not tested. They are the result of engineering analysis and are provided for reference only. 3. Guaranteed by design. 4. These are the specifications System Condition standby active, 64-bit bus option IDT tests to insure compliance. RV4640 180MHz Parameter Typical1 Max 180/60MHz RV4640 200MHz Typical1 Max 200/67MHz — 60mA2 — RV4640 267MHz Typical1 — 110mA2 — 2 610 mA 680mA2 680mA2 750mA2 — — 60mA2 CL = 0pF3 110mA2 — 110mA2 CL = 50pF 685mA2 760mA2 650mA2 800mA2 CL = 0pF, No SysAd activity3 750mA2 760mA2 835mA2 750mA2 900mA2 CL = 50pF R4x00 compatible writes TC = 25oC 850mA4 835mA2 950mA4 900mA2 1200mA4 CL = 50pF Pipelined writes or Write re-issue, TC = 25oC Typical integer instruction mix and cache miss rates, Vcc = 3.3V, TA = 25×C. 2. These are not tested. They are the result of engineering analysis and are provided for reference only. 3. Guaranteed by Conditions Max 267/89MHz 60mA2 1. 4. Conditions Max System Condition active, 64-bit bus option ICC Max RV4640 150MHz design. These are the specifications IDT tests to insure compliance. 16 of 23 April 10, 2001 IDT79RC4640™ AC Electrical Characteristics — Commercial/Industrial Temperature Range— RV4640 (VCC=3.3V ± 5%; Commercial TCASE = 0°C to +85°C, Industrial TCASE = -40°C to +85°C) Clock Parameters—RV4640 Note: Operation of the RC4650 is only guaranteed with the Phase Lock Loop enabled. Parameter Symbol RV4640 133MHz Test Conditions Min Pipeline clock Frequency PClk MasterClock HIGH tMCHIGH MasterClock LOW Units Max 50 133 MHz Transition ≤ tMCRise/Fall 3 — ns tMCLOW Transition ≤ tMCRise/Fall 3 — ns MasterClock Frequency — — 25 67 MHz MasterClock Period tMCP — 15 40 ns Clock Jitter for MasterClock tJitterIn1 — — ±250 ps — — 4 ns — — 4 ns — — 256* tMCP ns MasterClock Rise Time tMCRise 1 1 MasterClock Fall Time tMCFall ModeClock Period tModeCKP1 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. RV4640 150MHz Parameter Min Max RV4640 180MHz Min Max RV4640 200MHz Min Max RV4640 267MHz Min Units Max Pipeline clock Frequency 50 150 50 180 50 200 100 267 MHz MasterClock HIGH 3 — 3 — 3 — 3 — ns MasterClock LOW 3 — 3 — 3 — 3 — ns MasterClock Frequency1 25 75 25 90 25 100 50 125 MHz MasterClock Period 13.3 40 11.1 40 10 40 8 20 ns Clock Jitter for MasterClock — ±250 — ±250 — ±250 — ±250 ps MasterClock Rise Time — 3 — 2.5 — 2 — 2 ns MasterClock Fall Time — 3 — 2.5 — 2 — 2 ns ModeClock Period — 256* tMCP — 256* tMCP — 256* tMCP — 256* tMCP ns 1. Operation of the RC4650 is only guaranteed with the Phase Lock Loop enabled. 17 of 23 April 10, 2001 IDT79RC4640™ System Interface Parameters—RV4640 (VCC=3.3V ± 5%; Commercial TCASE = 0°C to +85°C, Industrial TCASE = -40°C to +85°C) Note: Timings are measured from 1.5V of the clock to 1.5V of the signal. Parameter Symbol RV4640 133MHz Test Conditions Min Data Output1 tDM= Min tDO = Max Data Output Hold tDOH Input Data Setup tDS Input Data Hold tDH 1. 2 RV4640 150MHz Max Min Units Max mode14..13 = 10 (fastest) 0 9 0 9 ns mode14..13 = 01 (slowest) 0 12 0 12 ns mode14..13 = 10 (fastest) 0 — 0 — ns trise = 5ns tfall = 5ns 4.5 — 4.5 — ns 1.5 — 1.5 — ns Capacitive load for all output timings is 50pF. 2. 50pf loading on external output signals, fastest settings Parameter Symbol RV4640 180MHz Test Conditions RV4640 200MHz RV4640 267MHz Min Units Min Max Min Max Max mode14..13 = 10 (fastest) 0 9 0 4.5 0 4.5 ns Data Output tDM= Min tDO = Max mode14..13 = 01 (slowest) 0 10 0 5.0 0 5.0 ns Data Output Hold tDOH1 mode14..13 = 10 (fastest) 0 — 0 — 0 — ns Data Input tDS trise = 3ns tfall = 3ns 4.5 — 4.5 — 2.5 — ns 1.5 — 1.5 — 1.0 — ns tDH 1. 50pf loading on external output signals, fastest settings Boot Time Interface Parameters—RV4640 Parameter Symbol 133MHz 150MHz 180MHz 200MHz 267MHz Test Conditions Min Max Min Max Min Max Min Max Min Max Units Conditions Mode Data Setup tDS — 3 — 3 — 3 — 3 — 3 — ns Master Clock Cycle Mode Data Hold tDH — 0 — 0 — 0 — 0 — 0 — ns Master Clock Cycle Capacitive Load Deration—RV4640 Parameter Symbol Test Conditions Load Derate — CLD 133MHz 150MHz 180MHz 200MHz Min Max Min Max Min Max Min Max — 2 — 2 — 2 — 2 18 of 23 267MHz Min — Max 1 Units ns/25pF April 10, 2001 IDT79RC4640™ Timing Characteristics—RV4640 1 Cycle 2 3 4 MasterClock tMCkHigh tMCkLow tMCkP SysAD,SysCmd Driven SysADC D D D tDM tDOH tDZ tDO SysAD,SysCmd Received SysADC D D D D tDS tDH Control Signal CPU driven ValidOut* Release* tDO tDOH Control Signal CPU received RdRdy* WrRdy* ExtRqst* ValidIn* NMI* Int*(5:0) tDS tDH * = active low signal Figure 5 System Clocks Data Setup, Output, and Hold timing 19 of 23 April 10, 2001 IDT79RC4640™ Mode Configuration Interface Reset Sequence 2.3V 2.3V Vcc MasterClock (MClk) TDS > 100ms VCCOK 256 MClk 256 MClk cycles cycles ModeClock TMDS TMDH Bit 0 ModeIn Bit 1 Bit 255 TDS TDS > 64K MClk cycles ColdReset* > 64 MClk cycles TDS TDS Reset* Figure 6 Power-on Reset Vcc Master Clock (MClk) TDS TDS > 100ms VCCOK 256 MClk cycles 256 MClk cycles ModeClock TMDS TMDH Bit Bit 1 255 Bit 0 ModeIn TDS TDS > 64K MClk cycles ColdReset* > 64 MClk cycles TDS TDS Reset* Figure 7 Cold Reset Vcc Master Clock (MClk) VCCOK 256 MClk cycles ModeClock ModeIn ColdReset* TDS Reset* TDS > 64 MClk cycles Figure 8 Warm Reset 20 of 23 April 10, 2001 IDT79RC4640™ Physical Specifications - 128-Pin PQFP PQFP 70 J X 45 0 3X L D D1 PIN 1 ID h X 45 0 e C E1 A1 A2 E A SYMBOLS MIN MAX 3.86 A 3.50 A1 .25 .51 A2 3.17 3.43 b .30 .45 C .13 .23 31.00 31.40 NOTES: 1. ALL DIMENSIONS ARE IN MILLIMETERS. TOLERANCES UNLESS Integrated Device Technology, Inc. OTHERWISE SPECIFIED D/E D1/E1 27.59 27.79 e .80 BSC J .20 REF h .89 REF L .68 FRAC DEC ANGLES %%p %%P APPROVALS DRAWN AA 3001 Stender Way, Santa Clara, CA 95054 %%P dt (408) 492-8333 FAX (408) 727-2328 DATE 11/95 128 LD MQUAD RMKT DWG (.80 LD PITCH, GULLWING) CHECKED SCALE N/A - SIZE A DRAWING NO. PSC-4054 DO NOT SCALE DRAWING 21 of 23 REV 00 SHEET OF1 1 April 10, 2001 IDT79RC4640™ RC4640 Package Pin-Out N.C. pins should be left floating for maximum flexibility as well as for compatibility with future designs. An asterisk (*) identifies a pin that is active when low. Pin Function Pin Function Pin Function Pin Function 1 N.C. 33 Vcc 65 Vcc 97 Vcc 2 SysCmd2 34 Vss 66 SysAD28 98 Vss 3 Vcc 35 SysAD13 67 ColdReset* 99 SysAD19 4 Vss 36 SysAD14 68 SysAD27 100 ValidIn* 5 SysAD5 37 Vss 69 Vss 101 Vcc 6 WrRdy* 38 Vcc 70 Vcc 102 Vss 7 ModeClock 39 SysAD15 71 N.C. 103 SysAD18 8 SysAD6 40 Vss 72 SysAD26 104 Int0* 9 Vcc 41 Vcc 73 N.C. 105 SysAD17 10 Vss 42 SysADC1 74 Vss 106 Vcc 11 SysCmd3 43 Vss 75 Vcc 107 Vss 12 SysAD7 44 Vcc 76 SysAD25 108 Int1* 13 SysCmd4 45 MasterClock 77 Vss 109 SysAD16 14 Vcc 46 VssP 78 Vcc 110 Int2* 15 Vss 47 VccP 79 SysAD24 111 Vcc 16 SysADC0 48 Vss 80 SysADC2 112 Vss 17 SysCmd5 49 Vss 81 Vss 113 Int3* 18 SysAD8 50 Vss 82 Vcc 114 SysAD0 19 Vcc 51 Vss 83 NMI* 115 Int4* 20 Vss 52 Vss 84 SysAD23 116 Vcc 21 SysCmd6 53 Vss 85 Release* 117 Vss 22 SysAD9 54 SysADC3 86 Vss 118 SysAD1 23 Vcc 55 VccOK 87 Vcc 119 Int5* 24 Vss 56 Vss 88 SysAD22 120 SysAD2 25 SysCmd7 57 Vcc 89 Modein 121 Vcc 26 SysAD10 58 SysAD31 90 RdRdy* 122 Vss 27 SysCmd8 59 Vss 91 SysAD21 123 SysCmd0 28 Vcc 60 Vcc 92 Vss 124 SysAD3 29 Vss 61 SysAD30 93 Vcc 125 Vcc 30 SysAD11 62 SysAD29 94 ExtRqst* 126 Vss 31 SysCmdP 63 Reset* 95 SysAD20 127 SysCmd1 32 SysAD12 64 Vss 96 ValidOut* 128 SysAD4 22 of 23 April 10, 2001 IDT79RC4640™ Ordering Information IDT79 YY Operating Voltage XXXX 999 Device Type Speed A A Package Temp range/ Process Blank I Commercial (0°C to +85°C Case) Industrial (-40°C to +85°C Case) DU DZ 128-pin PQFP 128-pin PQFP 100 133 150 180 200 267 100 MHz PClk 133 MHz PClk 150 MHz PClk 180 MHz PClk 200 MHz PClk 267 MHz PCLK 64-bit processor w/ DSP Capability 4640 R RV 5.0+/-5% 3.3+/-5% Valid Combinations IDT79R4640 - 100, 133MHz - DZ PQFP package, Commercial Temperature IDT79RV4640 - 133, 150, 180, 200, 267MHz - DU PQFP package, Commercial Temperature IDT79RV4640 - 133, 150, 180, 200MHz - DUI QFP package, Industrial Temperature CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-6116 fax: 408-330-1748 www.idt.com for Tech Support: email: [email protected] phone: 408-492-8208 The IDT logo is a registered trademark of Integrated Device Technology, Inc. 23 of 23 April 10, 2001