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SPAKMC331CFV20 Datasheet(PDF) 11 Page - Freescale Semiconductor, Inc |
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SPAKMC331CFV20 Datasheet(HTML) 11 Page - Freescale Semiconductor, Inc |
11 / 84 page MC68331TS/D 11 2.5 Signal Function DSACK[1:0] SIM Input 0 DSCLK CPU32 Input Serial Clock DSI CPU32 Input (Serial Data) DSO CPU32 Output (Serial Data) EXTAL SIM Input — FC[2:0] SIM Output — FREEZE SIM Output 1 HALT SIM Input/Output 0 IC[4:1] GPT Input — IFETCH CPU32 Output — IPIPE CPU32 Output — IRQ[7:1] SIM Input 0 MISO QSM Input/Output — MODCLK SIM Input — MOSI QSM Input/Output — OC[5:1] GPT Output — PAI GPT Input — PC[6:0] SIM Output (Port) PCS[3:0] QSM Input/Output — PE[7:0] SIM Input/Output (Port) PF[7:0] SIM Input/Output (Port) PQS[7:0] QSM Input/Output (Port) PCLK GPT Input — PWMA, PWMB GPT Output — QUOT SIM Output — RESET SIM Input/Output 0 RMC SIM Output 0 R/W SIM Output 1/0 RXD QSM Input — SCK QSM Input/Output — SIZ[1:0] SIM Output — SS QSM Input 0 TSC SIM Input — TXD QSM Output — XFC SIM Input — XTAL SIM Output — Table 6 MCU Signal Function Signal Name Mnemonic Function Address Bus ADDR[23:0] 24-bit address bus Address Strobe AS Indicates that a valid address is on the address bus Autovector AVEC Requests an automatic vector during interrupt acknowledge Bus Error BERR Indicates that a bus error has occurred Bus Grant BG Indicates that the MCU has relinquished the bus Bus Grant Acknowledge BGACK Indicates that an external device has assumed bus mastership Breakpoint BKPT Signals a hardware breakpoint to the CPU Bus Request BR Indicates that an external device requires bus mastership System Clockout CLKOUT System clock output Chip Selects CS[10:0] Select external devices at programmed addresses Table 5 MCU Signal Characteristics (Continued) Signal Name MCU Module Signal Type Active State Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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