LTC1599 Linear Technology, LTC1599 Datasheet - Page 18

• Manufacturer Part Number: LTC1599
• Description: 16-Bit Byte Wide/ Low Glitch Multiplying DAC with 4-Quadrant Resistors
• Manufacturer: Linear Technology

LTC1599
GETDATA PSHX
*
*****************************************
* Retrieve DAC data from memory and
* send it to the LTC1599
*****************************************
*
*
*
*
*******************************************
* The next two instructions exercise
* the LD input, latching the data
* that was just loaded
*******************************************
*
*
*******************************************
* Data transfer routine completed
*******************************************
*
18
APPLICATIONS
PSHY
PSHA
LDY
LDAA
BCLR
BCLR
STAA
BSET
BSET
LDAA
BCLR
STAA
BSET
BCLR
BSET
PULA
PULY
PULX
RTS
#$1000
LBYTE
PORTA,Y %00010000
PORTA,Y %00001000
PORTB
PORTA,Y %00001000
PORTA,Y %00010000
MBYTE
PORTA,Y %00001000
PORTB
PORTA,Y %00001000
PORTD,Y %00100000
PORTD,Y %00100000
U
Setup index
Restore the A register
Restore the Y register
Restore the X register
INFORMATION
U
*
W
*
*
Retrieve the least significant byte from memory
This sets PORTA, Bit4 output to a logic
low, forcing MLBYTE input to a logic low
This forces a low on the LTC1599’s WR pin
Transfer the least significant byte to the DAC
This forces a high on the LTC1599’s WR pin
This sets PORTA, Bit4 output to a logic
high, forcing MLBYTE to a logic high
Retrieve the most significant byte from memory
This forces a low on the LTC1599’s WR pin
Transfer the most significant byte to the DAC
This forces a high on the LTC1599’s WR pin
*
*
LD goes low
and returns high
*
U