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LTC1296CCSW Datasheet(PDF) 14 Page - Linear Technology |
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LTC1296CCSW Datasheet(HTML) 14 Page - Linear Technology |
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14 / 28 page  14 LTC1293/LTC1294/LTC1296 129346fs PART NUMBER TYPE OF INTERFACE Motorola MC6805S2, S3 SPI MC68HC11 SPI MC68HC05 SPI RCA CDP68HC05 SPI Hitachi HD6305 SCI Synchronous HD6301 SCI Synchronous HD63701 SCI Synchronous HD6303 SCI Synchronous HD64180 SCI Synchronous National Semiconductor COP400 Family MICROWIRE † COP800 Family MCROWIRE/PLUS † NS8050U MICROWIRE/PLUS HPC16000 Family MICROWIRE/PLUS Texas Instruments TMS7002 Serial Port TMS7042 Serial Port TMS70C02 Serial Port TMS70C42 Serial Port TMS32011* Serial Port TMS32020* Serial Port TMS370C050 SPI S APPLICATI I FOR ATIO Power Shutdown Operating Sequence Example: Differential Inputs (CH4 +, CH5–), Unipolar Mode and MSB-First Data all logical ones will be shifted out followed by logical zeroes till CS goes high. Then the DOUT line will go into its high impedance state. The LTC 1293/4/6 will remain in the shutdown mode till the next CS cycle. There is no warm- up or wait period required after coming out of the power shutdown cycle so a conversion can commence after CS goes low (see Power Shutdown Operating Sequence). The LTC1296 has a System Shutdown Output pin (SSO) which will go low when power shutdown is activated. The pin will stay low till next CS cycle. Microprocessor Interfaces The LTC1293/4/6 can interface directly (without external hardware) to most popular microprocessors (MPU) syn- chronous serial formats (see Table 1). If an MPU without a dedicated serial port is used, then three of the MPU’s parallel port lines can be programmed to form the serial link to the LTC1293/4/6. Included here are one serial interface example and one example showing a parallel port programmed to form the serial interface. Microprocessor Interfaces The LTC1293/4/6 can interface directly (without external hardware) to most popular microprocessors (MPU) syn- chronous serial formats (see Table 1). If an MPU without a dedicated serial port is used, then three of the MPU’s parallel port lines can be programmed to form the serial link to the LTC1293/4/6. * Requires external hardware ** Contact factory for interface information for processors not on this list † MICROWIRE and MICROWIRE/PLUS are trademarks of National Semiconductor Corp. Table 1. Microprocessor with Hardware Serial Interfaces Compat- ible with the LTC1293/4/6** DIN LTC1293 AI06 SHUTDOWN* REQUEST POWER SHUTDOWN NEW CONVERSION BEGINS PS MSBF UNI SEL0 ODD/ SIGN SEL1/ DIFF SEL1 START DON'T CARE PS UNI SEL0 ODD/ SIGN SEL1/ DIFF SEL1 START MSBF B0 B11 • • • • • • • • • • HI-Z DOUT FILLED WITH ZEROES HI-Z CLK CS *STOPPING THE CLOCK WILL HELP REDUCE POWER CONSUMPTION. CS CAN BE BROUGHT HIGH ONCE THE DIN WORD HAS BEEN CLOCKED IN. |
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