データシートサーチシステム |
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MC68340 データシート(PDF) 37 Page - Freescale Semiconductor, Inc |
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MC68340 データシート(HTML) 37 Page - Freescale Semiconductor, Inc |
37 / 441 page MOTOROLA MC68340 USER’S MANUAL 2- 3 Table 2-1. Signal Index (Continued) Signal Name Mnemonic Function Input/ Output Clock Mode Select/ Port B0 MODCK Selects the source of the internal system clock upon reset or becomes a parallel I/O port In/I/O Instruction Fetch/ Development Serial In IFETCH/DSI Indicates when the CPU32 is performing an instruction word prefetch and when the instruction pipeline has been flushed or provides background debug mode serial in Out/In Instruction Pipe/ Development Serial Out IPIPE/DSO Used to track movement of words through the instruction pipeline or provides background debug mode serial out Out/Out Breakpoint/Development Serial Clock BKPT/DSCLK Signals a hardware breakpoint to the CPU32 or provides background debug mode serial clock In/— Freeze FREEZE Indicates that the CPU32 has entered background debug mode Out Transmit Data TxDA, TxDB Transmitter serial data output from the serial module Out Clear-to-Send CTSA, CTSB Serial module clear-to-send inputs In Request-to-Send/ OP1, OP0 RTSB, RTSA Channel request-to-send outputs or discrete outputs Out/Out Serial Crystal Oscillator X1, X2 Connections for an external crystal to the serial module internal oscillator circuit Serial Clock SCLK External serial module clock input In Transmitter Ready/OP6 T ≈RDYA Indicates transmit buffer has a character or becomes a parallel output Out/Out Receiver Ready/ FIFO Full/OP4 R ≈RDYA Indicates receive buffer has a character, the receiver FIFO buffer is full or becomes a parallel output Out/Out/Out DMA Request DRE Q2, DREQ1 Input that starts a DMA process In DMA Acknowledge DACK2, DACK1 Output that signals an access during DMA Out DMA Done DONE2, DONE1 Bi-directional signal that indicates the last transfer I/O Timer Gate TGATE2, TGATE1 Counter enable input to timer In Timer Input TIN2, TIN1 Time reference input to timer In Timer Output TOUT2, TOUT1 Output waveform from timer Out Test Clock TCK Provides a clock for IEEE 1149.1 test logic In Test Mode Select TMS Controls test mode operations In Test Data In TDI Shifts in instructions and test data In Test Data Out TDO Shifts out instructions and test data Out Synchronizer Power VCCSYN Quiet power supply to VCO; also used to control synthesizer mode after reset. — System Power Supply and Ground VCC, GND Power supply and ground to the MC68340 — Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
同様の部品番号 - MC68340 |
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同様の説明 - MC68340 |
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