參數(shù)資料
型號(hào): LTC2408I
廠商: Linear Technology Corporation
英文描述: 20-Bit Universal Bus Driver With 3-State Outputs 56-TVSOP -40 to 85
中文描述: 4-/8-Channel 24位ADC的無延遲uPower
文件頁數(shù): 32/36頁
文件大小: 351K
代理商: LTC2408I
32
LTC2404/LTC2408
*****************************************************************************
*
* This example program loads multiplexer channels selection data into
* either the LTC2408’s internal MUX or an external LTC1391 MUX. It then
* transfers the LTC2408’s 32-bit output conversion result to four
* consecutive 8-bit memory locations.
*
*
*****************************************************************************
*
***************************************
* 68HC11 register definitions
*
***************************************
*
PORTD
EQU
$1008
Port D data register
*
“ - , - , SS* ,CSK ;MOSI,MISO,TxD ,RxD “
DDRD
EQU
$1009
Port D data direction register
SPCR
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 LTC2408’s 32 conversion result
*
DIN1
EQU
$00
This memory location holds the LTC2408’s bits 31 - 24
DIN2
EQU
$01
This memory location holds the LTC2408’s bits 23 - 16
DIN3
EQU
$02
This memory location holds the LTC2408’s bits 15 - 08
DIN4
EQU
$03
This memory location holds the LTC2408’s bits 07 - 00
MUX
EQU
$04
This memory location holds the MUX address data
*
***************************************
* Start GETDATA Routine
*
***************************************
*
ORG
$C000
Program start location
INIT1
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
*
***************************************
* The next routine sends data to the
*
* LTC2408 an sets its MUX channel
*
***************************************
*
LDAA
MUX
Retrieve MUX address
TAB
Save contents of Accum. A
SUBA
#$07
Is the MUX address in the low nibble
BLE
ENLWMX
If it is, branch to enable the LTC2408’s internal MUX
TBA
Restore contents of Accum. A
ORAA
#$80
Enable the LTC1391 external MUX
BRA
MUXSPI
Go to SPI transfer2400
*
*
*
*
*
APPLICATIO
S I
FOR
ATIO
U
W
U
U
相關(guān)PDF資料
PDF描述
LTC2408IG 4-/8-Channel 24-Bit uPower No Latency ADCs
LTC2410CGN 20-Bit Universal Bus Driver With 3-State Outputs 56-SSOP -40 to 85
LTC2410IGN 24-Bit No Latency ADC with Differential Input and Differential Reference
LTC2410 20-Bit Universal Bus Driver With 3-State Outputs 56-SSOP -40 to 85
LTC2410C 20-Bit Universal Bus Driver With 3-State Outputs 56-TVSOP -40 to 85
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC2408IG 功能描述:IC CONN 24BIT 8CHANNEL 28-SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率(每秒):45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散(最大):315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端,單極
LTC2408IG#PBF 功能描述:IC A/D CONV 24BIT 8-CHAN 28-SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率(每秒):45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散(最大):315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端,單極
LTC2408IG#TR 功能描述:IC ADC 24BIT 8CH MICROPWR 28SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率(每秒):45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散(最大):315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端,單極
LTC2408IG#TRPBF 功能描述:IC A/D CONV 24BIT 8-CHAN 28-SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率(每秒):45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散(最大):315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端,單極
LTC2410CGN 功能描述:IC ADC 24BIT DIFF INP/REF 16SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率(每秒):45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散(最大):315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端,單極