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參數(shù)資料
| 型號： | LTC1294 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Single Chip 12-Bit Data Acquisition System(單片，12位數(shù)據(jù)采集系統(tǒng)) |
| 中文描述： | 單芯片12位數(shù)據(jù)采集系統(tǒng)（單片，12位數(shù)據(jù)采集系統(tǒng)） |
| 文件頁數(shù)： | 15/28頁 |
| 文件大小： | 403K |
| 代理商： | LTC1294 |
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15
LTC1293/LTC1294/LTC1296
Interfacing to the Parallel Port of the Intel 8051 Family
The Intel 8051 has been chosen to show the interface
between the LTC1293/4/6 and parallel port microproces-
sors. Usually the signals CS, D
IN
and CLK are generated
on three port lines and the D
OUT
signal is read on a fourth
port line. This works very well. One can save a line by tying
the D
IN
and D
OUT
lines together. The 8051 first sends the
start bit and D
IN
to the LTC1294 over the line connected to
P1.2. Then P1.2 is reconfigured as an input and the 8051
reads back the 12-bit A/D result over the same data line.
U
S
A
O
PPLICATI
U
U
Data Exchange Between LTC1294 and MC68HC11
Motorola SPI (MC68HC11)
The MC68HC11 has been chosen as an example of an MPU
with a dedicated serial port. This MPU transfers data MSB-
first and in 8-bit increments. The D
IN
word sent to the data
register starts the SPI process. With three 8-bit transfers,
the A/D result is read into the MPU. The second 8-bit
transfer clocks B11 through B8 of the A/D conversion
result into the processor. The third 8-bit transfer clocks
the remaining bits B7 through B0 into the MPU. The data
is right justified in the two memory locations. ANDing the
second byte with 0D
HEX
clears the four most significant
bits. This operation was not included in the code. It can be
inserted in the data gathering loop or outside the loop
when the data is processed.
Hardware and Software Interface to Motorola MC68HC11
CS
CLK
D
OUT
MPU
RECEIVED
WORD
LTC1293 TD01
UNI
SGL/
DIFF
ODD/
EVEN
S1
S0
START
MSBF
PS
B3
B7
B6
B5
B4
B2
B0
B1
B11
B10
B9
B8
D
IN
MPU
TR WORD
BYTE 3 (DUMMY)
BYTE 2
SGL
0
ODD
SEL
0
SEL
1
BYTE 1
X
UNI MSBF
PS
X
X
X
X
0
0
1
START
X
X
X
X
X
X
X
X
BYTE 3
BYTE 2
BYTE 1
B11
0
B10
B8
B9
B7
B6
B4
B5
B3
B2
B0
B1
DON'T CARE
LTC1293 TD01a
CLK
D
OUT
LTC1294
CS
ANALOG
INPUTS
DO
SCK
MISO
MC68HC11
MOSI
D
IN
B2
B1
B0
B3
B4
B6
B7
B5
BYTE 1
B10
B9
B8
B11
O
O
O
O
DOUT FROM LTC1294 STORED ON MC68HC11 RAM
BYTE 2
LSB
MSB
#62
#63
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| LTC1294BCN | 功能描述:IC DATA ACQ SYSTEM 12BIT 20-DIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
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