參數(shù)資料
型號: LTC2404I
廠商: Linear Technology Corporation
英文描述: 18-Bit Universal Bus Driver With 3-State Outputs 56-TSSOP -40 to 85
中文描述: 4-/8-Channel 24位ADC的無延遲uPower
文件頁數(shù): 31/36頁
文件大?。?/td> 351K
代理商: LTC2404I
31
LTC2404/LTC2408
APPLICATIO
S I
N
FOR
ATIO
U
W
U
68HC11
2404/08
F29
MISO (PD2)
6
9
TO
17
COM
GND
1, 5, 16, 18, 22, 27, 28
23
20
25
19
21
24
CSADC
CSMUX
SCK
CLK
D
IN
SDO
26
F
O
LTC2408
CH0 TO
CH7
MUXOUT
7
4
ADCIN
3
V
REF
2, 8
10
μ
F
5V
V
CC
V
CC
+
24-BIT
ADC
SCK (PD4)
MOSI (PD3)
SS (PD5)
LTC1391
S0
S1
S2
S3
S4
S5
S6
S7
CH8
CH9
CH10
CH11
CH12
CH13
CH14
CH15
1
2
3
4
5
6
7
8
D
CLK
CS
D
OUT
D
IN
15
10
11
13
12
Figure 29. Combining the LTC2408 with the LTC1391 for 16 Input Channels
Figure 28. LTC2408-68HC11 MCU Digital Interface Routine
*
***************************************
* The SPI data transfer
***************************************
*
TRFLP1
LDAA
#$0
STAA
SPDR
*
WAIT1
LDAA
SPSR
*
BPL
*
*
LDAA
SPDR
*
STAA
0,X
INX
CPX
BNE
*
BSET
PORTD,Y %00100000 This sets the SS* output bit to a logic
*
PULA
Restore the A register
PULY
Restore the Y register
PULX
Restore the X register
RTS
*
Load accumulator A with a null byte for SPI transfer
This writes the byte into the SPI data register and
starts the transfer
This loop waits for the SPI to complete a serial
transfer/exchange by reading the SPI Status Register
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.
Load accumulator A with the current byte of LTC2408 data
that was just received
Transfer the LTC2408’s data to memory
Increment the pointer
#DIN4+1 Has the last byte been transferred/exchanged
TRFLP1 If the last byte has not been reached, then proceed to
the next byte for transfer/exchage
high, de-selecting the LTC2408
相關(guān)PDF資料
PDF描述
LTC2408 18-Bit Universal Bus Driver With 3-State Outputs 56-TVSOP -40 to 85
LTC2408C 20-Bit Universal Bus Driver With 3-State Outputs 56-TSSOP -40 to 85
LTC2408CG 4-/8-Channel 24-Bit uPower No Latency ADCs
LTC2408I 20-Bit Universal Bus Driver With 3-State Outputs 56-TVSOP -40 to 85
LTC2408IG 4-/8-Channel 24-Bit uPower No Latency ADCs
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