參數資料
型號: LTC2410IGN#TRPBF
廠商: Linear Technology
文件頁數: 40/48頁
文件大小: 0K
描述: IC ADC 24BIT DIFF INP/REF 16SSOP
標準包裝: 2,500
位數: 24
采樣率(每秒): 7.5
數據接口: MICROWIRE?,串行,SPI?
轉換器數目: 2
功率耗散(最大): 1mW
電壓電源: 單電源
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應商設備封裝: 16-SSOP
包裝: 帶卷 (TR)
輸入數目和類型: 1 個差分,雙極
配用: DC575A-ND - BOARD DELTA SIGMA ADC LTC2410
LTC2410
45
TYPICAL APPLICATIO S
U
**********************************
* The next short loop waits for the
*
* LTC2410's conversion to finish before *
* starting the SPI data transfer
*
**********************************
*
CONVEND LDAA
PORTD
Retrieve the contents of port D
ANDA
#%00000100
Look at bit 2
*
Bit 2 = Hi; the LTC2410's conversion is not
*
complete
*
Bit 2 = Lo; the LTC2410's conversion is complete
BNE
CONVEND
Branch to the loop's beginning while bit 2 remains
high
*
********************
* The SPI data transfer *
********************
*
TRFLP1
LDAA
#$0
Load accumulator A with a null byte for SPI transfer
STAA
SPDR
This writes the byte in the SPI data register and starts
*
the transfer
WAIT1
LDAA
SPSR
This loop waits for the SPI to complete a serial
transfer/exchange by reading the SPI Status Register
BPL
WAIT1
The SPIF (SPI transfer complete flag) bit is the SPSR's MSB
*
and is set to one at the end of an SPI transfer. The branch
*
will occur while SPIF is a zero.
LDAA
SPDR
Load accumulator A with the current byte of LTC2410 data
that was just received
STAA
0,X
Transfer the LTC2410's data to memory
INX
Increment the pointer
CPX
#DIN4+1 Has the last byte been transferred/exchanged?
BNE
TRFLP1
If the last byte has not been reached, then proceed to the
*
next byte for transfer/exchange
BSET
PORTD,Y %00100000 This sets the SS* output bit to a logic high,
*
de-selecting the LTC2410
PULA
Restore the A register
PULY
Restore the Y register
PULX
Restore the X register
RTS
Figure 56. This is an Example of 68HC11 Code That Captures the LTC2410’s
Conversion Results Over the SPI Serial Interface Shown in Figure 55
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