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TFB2022AI Datasheet(PDF) 4 Page - Texas Instruments |
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TFB2022AI Datasheet(HTML) 4 Page - Texas Instruments |
4 / 10 page TFB2022AI FUTUREBUS+ DATA PATH UNIT SLLS183 − AUGUST 1994 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 Terminal Functions other module interface signals TERMINAL I/O FROM/TO DESCRIPTION NAME NO. I/O FROM/TO DESCRIPTION MS<1:0> 33, 34 O Module Memory decode of the host address: LL Unselected LH Host memory HL Host-unit space HH CSR space REFCLK 151 I Module Clock input. A 25-MHz, 50% ±5% duty-cycle signal is recommended; any frequency between 25 MHz and 33 MHz and duty cycle of 50% ±5% can be tolerated. REFCLK determines packet-mode transfer speed. interface to TFB2002A TERMINAL I/O FROM/TO DESCRIPTION NAME NO. I/O FROM/TO DESCRIPTION DATAAV* 153 O TFB2002B IOC Data available in FIFO. In compelled mode, DATAAV* indicates if any data is in the FIFO. In packet or burst mode, DATAAV* indicates if a packet or burst data of length encoded on Futurebus+ packet size or the DL<1:0> lines is available. DMAMODE 154 I TFB2002B IOC DMA operation is occurring. FMODE and HMODE are modified for this function. ERROR<1:0> 21, 22 O TFB2002B IOC Futurebus+ error indicators: LL No error LH Futurebus+ parity error HL Packet longitudinal error HH Host-interface-data parity error FADEC<3:0> 143, 142, 141, 139 O TFB2002B IOC Futurebus+ address decode: LLLL Unselected LLLH Host memory LLHL Host-extended-unit space LLHH Host CSR LHLL Broadcast mailbox LHLH Reserved LHHL Reserved LHHH Reserved HLLL Mailbox address HLLH Packet-mode-capable memory address HLHL Reserved HLHH Reserved HHLL Reserved HHLH DPU CSR HHHL Broadcast CSR (non-DPU) HHHH Broadcast CSR (DPU) FIFORST* 19 I TFB2002B IOC FIFO reset. FIFORST* resets the FIFO pointers FACK 133 O TFB2002B IOC Futurebus+ acknowledge. Futurebus+ event complete FMODE<2:0> 138, 137, 136 I TFB2002B IOC Futurebus+ mode. FMODE<2:0> indicates to the TFB2022AI what action is to be taken in the Futurebus+ interface: LLL Compelled-mode Futurebus+ LLH Packet-mode Futurebus+ LHL Partial transfer LHH Disconnect data for master write HLL Reserved HLH Reserved HHL Disconnect data for split requestor HHH Reserved |
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