LTC1091_15 Datasheet, PDF (17/32 Pages) Linear Technology – 1-, 2-, 6- and 8-Channel, 10-Bit Serial I/O Data Acquisition Systems

APPLICATI S I FOR ATIO
CS
1
2
CLK
MSBF
LATCHED
BY LTC1091
3
4
LTC1091/LTC1092
LTC1093/LTC1094
DATA (D_IN/D_OUT)
START
SGL/
ODD/
DIFF
SIGN
MSBF
B9
B8
•••
MPU CONTROLS
DATA LINE AND SENDS
MUX ADDRESS TO LTC1091
PROCESSOR
MUST RELEASE
DATA LINE AFTER 4TH
RISING CLK AND BEFORE
THE 4TH FALLING CLK
LTC1091 CONTROLS
DATA LINE AND SENDS
A/D RESULT BACK TO MPU
LTC1091 TAKES CONTROL OF DATA LINE
ON 4TH FALLING CLK
1091/2/3/4 F02
Figure 2. LTC1091 Operation with D_IN and D_OUT Tied Together
5. Microprocessor Interfaces
The LTC1091/LTC1092/LTC1093/LTC1094 can interface
directly (without external hardware) to most popular
microprocessor (MPU) synchronous serial formats (see
Table 1). If an MPU without a dedicated serial port is used,
then three or four of the MPU’s parallel port lines can be
programmed to form the serial link to the LTC1091/
LTC1092/LTC1093/LTC1094. Included here are one serial
interface example and one example showing a parallel port
programmed to form the serial interface.
Table 1. Microprocessors with Hardware Serial Interfaces
Compatible with the LTC1091/LTC1092/LTC1093/LTC1094
PART NUMBER
TYPE OF INTERFACE
Motorola
MC6805S2, S3
SPI
MC68HC11
SPI
MC68HC05
SPI
RCA
CDP68HC05
SPI
Hitachi
HD6305
HD63705
HD6301
HD63701
HD6303
HD64180
SCI Synchronous
SCI Synchronous
SCI Synchronous
SCI Synchronous
SCI Synchronous
CSI/O
National Semiconductor
COP400 Family
COP800 Family
NS8050U
HPC16000 Family
MICROWIRE^TM
MICROWIRE/PLUS
MICROWIRE/PLUS
MICROWIRE/PLUS
Texas Instruments
TMS7002
TMS7042
TMS70C02
TMS70C42
TMS32011*
TMS32020
Serial Port
Serial Port
Serial Port
Serial Port
Serial Port
Serial Port
*Requires external hardware
MICROWIRE is a trademark of National Semiconductor Corp.
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