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LTC1098ACN8 датащи(PDF) 26 Page - Linear Technology |
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LTC1098ACN8 датащи(HTML) 26 Page - Linear Technology |
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26 / 32 page ![]() LTC1096/LTC1096L LTC1098/LTC1098L 26 10968fc TYPICAL APPLICATIONS MPU TRANSMIT WORD CS CLK DOUT MPU RECEIVED WORD DIN 00 0 1 ODD/ SIGN MSBF X SGL/ DIFF XXXXXXXX START BIT BYTE 1 BYTE 2 (DUMMY) X = DON'T CARE START SGL/ DIFF DON'T CARE B7 B6 B5 B4 B3 B2 B1 B0 ODD/ SIGN MSBF ?? ?? ? ? ?0 B7 B6 B5 B4 B3 B2 B1 B0 2ND TRANSFER 1ST TRANSFER 10968 TA03 10968 TA04 CLK DIN CS ANALOG INPUTS C0 SCK DOUT MISO MOSI MC68HC05C4 LTC1098 LOCATION A + 1 LSB LOCATION A BYTE 2 BYTE 1 10968 TA05 B7 B6 B5 B4 B3 B2 B1 B0 00 00 0 0 00 Data Exchange Between LTC1098(L) and MC68HC05C4 Hardware and Software Interface to Motorola MC68HC05C4 DOUT from LTC1098(L) Stored in MC68HC05C4 LABEL MNEMONIC COMMENTS START BCLRn LDA STA TST BPL LDA STA AND STA TST BPL BSETn LDA STA Bit 0 Port C goes low (CS goes low) Load LTC1098(L) DIN word into Acc. Load LTC1098(L) DIN word into SPI from Acc. Transfer begins. Test status of SPIF Loop to previous instruction if not done with transfer Load contents of SPI data register into Acc. (DOUT MSBs) Start next SPI cycle Clear the first DOUT word Store in memory location A (MSBs) Test status of SPIF Loop to previous instruction if not done with transfer Set B0 of Port C (CS goes high) Load contents of SPI data register into Acc. (DOUT LSBs) Store in memory location A + 1 (LSBs) |
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