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R4430PCP10MCM Datasheet(PDF) 7 Page - Aeroflex Circuit Technology |
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R4430PCP10MCM Datasheet(HTML) 7 Page - Aeroflex Circuit Technology |
7 / 11 page 7 SCD4430 Rev A 11/18/96 Interrupt Interface Signals: These signals comprise the interface used by external agents to interrupt the R4400 processor Int(5:1)* I Interrupt : Five of six general processor interrupts, bit- wise ORed with bits 5:1 of the interrupt register. This feature available on the R4400PC version only Int0* I Interrupt: One of six general processor interrupts, bit wise ORed with bit 0 of the interrupt register NMI* I Nonmaskable interrupt : Nonmaskable interrupt ORed with bit 6 of the interrupt register Initialization Interface: These signals comprise the interface by which an external agent initializes the R4400 operating parameters. ColdReset* I Cold Reset: This signal must be asserted for a power on reset or a cold reset. The clocks SClock, TClock, and RClock begin to cycle and are synchronized with the de-assertion edge of ColdReset*. ColdReset must be de- asserted synchronously with MasterOut. ModeClock O Boot Mode Clock: Serial boot-mode data clock output at the system clock frequency divided by 256 ModeIn I Boot mode data in: Serial boot-mode data input. Reset* I Reset: This signal must be asserted for any reset sequence. It may be asserted synchronously or asyn- chronously for a cold reset, or synchronously to initate a warm reset. Reset must be de-asserted synchronously with MasterOut. VccOk I Vcc is OK: When asserted, this signal tells the R4400 that the 3.3 Volt power supply has been above 3.15 Volts for more than 100 milliseconds & will remain sta- ble . Assertion of VccOK starts initialization sequence. 256K/1M* I Cache size Select: Must be connected to ground to enable the full 1M Byte of cache. Cache size will be 256K if pin is left unconnected. JTAG Interface Signals JTDI I JTAG data in: Data is serial, scanned in thru this pin JTCK I JTAG clock input: The processor outputs a serial clock on JTCK. On the rising edge of JTCK, both JTDI and JTMS are sampled. JTDO O JTAG data out: Data is serial, scanned out thru this pin JTMS I JTAG: JTAG command signal indicates that the incom- ming serial data is command clear. |
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