参数资料
型号: LTC2410IGN#PBF
厂商: Linear Technology
文件页数: 39/48页
文件大小: 0K
描述: IC ADC 24BIT DIFF INP/REF 16SSOP
标准包装: 100
位数: 24
采样率(每秒): 7.5
数据接口: MICROWIRE?,串行,SPI?
转换器数目: 2
功率耗散(最大): 1mW
电压电源: 单电源
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
供应商设备封装: 16-SSOP
包装: 管件
输入数目和类型: 1 个差分,双极
配用: DC575A-ND - BOARD DELTA SIGMA ADC LTC2410
LTC2410
44
TYPICAL APPLICATIO S
U
*****************************************************
* This example program transfers the LTC2410's 32-bit output
*
* conversion result into four consecutive 8-bit memory locations. *
*****************************************************
*68HC11 register definition
PORTD
EQU
$1008
Port D data register
*
" – , – , SS* ,CSK ;MOSI,MISO,TxD ,RxD"
DDRD
EQU
$1009
Port D data direction register
SPSR
EQU
$1028
SPI control register
*
"SPIE,SPE ,DWOM,MSTR;SPOL,CPHA,SPR1,SPR0"
SPSR
EQU
$1029
SPI status register
*
"SPIF,WCOL, – ,MODF; – , – , – , – "
SPDR
EQU
$102A
SPI data register; Read-Buffer; Write-Shifter
*
* RAM variables to hold the LTC2410's 32 conversion result
*
DIN1
EQU
$00
This memory location holds the LTC2410's bits 31 - 24
DIN2
EQU
$01
This memory location holds the LTC2410's bits 23 - 16
DIN3
EQU
$02
This memory location holds the LTC2410's bits 15 - 08
DIN4
EQU
$03
This memory location holds the LTC2410's bits 07 - 00
*
**********************
* Start GETDATA Routine *
**********************
*
ORG
$C000
Program start location
INIT1
LDS
#$CFFF
Top of C page RAM, beginning location of stack
LDAA
#$2F
–,–,1,0;1,1,1,1
*
–, –, SS*-Hi, SCK-Lo, MOSI-Hi, MISO-Hi, X, X
STAA
PORTD
Keeps SS* a logic high when DDRD, bit 5 is set
LDAA
#$38
–,–,1,1;1,0,0,0
STAA
DDRD
SS*, SCK, MOSI are configured as Outputs
*
MISO, TxD, RxD are configured as Inputs
*DDRD's bit 5 is a 1 so that port D's SS* pin is a general output
LDAA
#$50
STAA
SPCR
The SPI is configured as Master, CPHA = 0, CPOL = 0
*
and the clock rate is E/2
*
(This assumes an E-Clock frequency of 4MHz. For higher E-
*
Clock frequencies, change the above value of $50 to a value
*
that ensures the SCK frequency is 2MHz or less.)
GETDATA PSHX
PSHY
PSHA
LDX
#$0
The X register is used as a pointer to the memory locations
*
that hold the conversion data
LDY
#$1000
BCLR
PORTD, Y %00100000
This sets the SS* output bit to a logic
*
low, selecting the LTC2410
*
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