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TLV5604CPWR Datasheet(PDF) 22 Page - Texas Instruments |
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TLV5604CPWR Datasheet(HTML) 22 Page - Texas Instruments |
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22 / 27 page  TLV5604 2.7-V TO 5.5-V 10-BIT 3- µS QUADRUPLE DIGITAL-TO-ANALOG CONVERTERS WITH POWER DOWN SLAS176A – DECEMBER 1997 – REVISED SEPTEMBER 1998 22 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION A_MSB_TX: JNB TI,A_MSB_TX ; wait for transmit to complete CLR TI ; clear for new transmit MOV SBUF,A ; and send out the lsb of DAC A ; DAC C next ; DAC C codes should be taken from 16 bytes (8 samples) further on in the sine table ; – this gives a cosine function MOV A,R7 ; pointer in R7 ADD A,#0FH ; add 15 – already done one INC ANL A,#03FH ; wrap back round to 0 if > 64 MOV R7,A ; pointer back in R7 MOVC A,@A+DPTR ; get DAC C msb from the table ORL A,#01H ; set control bits to DAC C address A_LSB_TX: JNB TI,A_LSB_TX ; wait for DAC A lsb transmit to complete SETB T1 ; toggle FS CLR T1 CLR TI ; clear for new transmit MOV SBUF,A ; and send out the msb of DAC C INC R7 ; increment the pointer in R7 MOV A,R7 ; to get the next byte from the table MOVC A,@A+DPTR ; which is the lsb of this sample, now in ACC C_MSB_TX: JNB TI,C_MSB_TX ; wait for transmit to complete CLR TI ; clear for new transmit MOV SBUF,A ; and send out the lsb of DAC C ; DAC B next ; DAC B codes should be taken from 16 bytes (8 samples) further on ; in the sine table – this gives an inverted sine function MOV A,R7 ; pointer in R7 ADD A,#0FH ; add 15 – already done one INC ANL A,#03FH ; wrap back round to 0 if > 64 MOV R7,A ; pointer back in R7 MOVC A,@A+DPTR ; get DAC B msb from the table ORL A,#02H ; set control bits to DAC B address C_LSB_TX: JNB TI,C_LSB_TX ; wait for DAC C lsb transmit to complete SETB T1 ; toggle FS CLR T1 CLR TI ; clear for new transmit MOV SBUF,A ; and send out the msb of DAC B ; get DAC B LSB INC R7 ; increment the pointer in R7 MOV A,R7 ; to get the next byte from the table MOVC A,@A+DPTR ; which is the lsb of this sample, now in ACC B_MSB_TX: JNB TI,B_MSB_TX ; wait for transmit to complete CLR TI ; clear for new transmit MOV SBUF,A ; and send out the lsb of DAC B |
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