Datasheet LTC1292, LTC1297 (Analog Devices) - 9
| Manufacturer | Analog Devices |
| Description | Single Chip 12-Bit Data Acquisition Systems |
| Pages / Page | 24 / 9 — APPLICATI. S I FOR ATIO. LTC1292 Operating Sequence. LTC1297 Operating … |
| File Format / Size | PDF / 325 Kb |
| Document Language | English |
APPLICATI. S I FOR ATIO. LTC1292 Operating Sequence. LTC1297 Operating Sequence. Microprocessor Interfaces
Model Line for this Datasheet
Text Version of Document
LTC1292/LTC1297
O U U W U APPLICATI S I FOR ATIO LTC1292 Operating Sequence
tCYC CS CLK Hi-Z D B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 OUT tSMPL tCONV tSMPL LTC1292/7 AI01
LTC1297 Operating Sequence
tCYC CS tsuCS POWER SHUTDOWN MODE CLK Hi-Z D B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 B1 B2 B3 B4 B5 B6 OUT B7 B8 B9 B10 B11 LTC1292/7 AI02 tSMPL tCONV
Microprocessor Interfaces Motorola SPI (MC68HC11)
The LTC1292/LTC1297 can interface directly (without The MC68HC11 has been chosen as an example of an MPU external hardware) to most popular microprocessors’ with a dedicated serial port. This MPU transfers data MSB (MPU) synchronous serial formats (see Table 1). If an first and in 8-bit increments. A dummy DIN word sent to the MPU without a dedicated serial port is used, then three of data register starts the SPI process. With two 8-bit transfers, the MPU’s parallel port lines can be programmed to form the A/D result is read into the MPU (Figure 1). For the the serial link to the LTC1292/LTC1297. Included here are LTC1292 the first 8-bit transfer clocks B11 through B8 of one serial interface example and one example showing a the A/D conversion result into the processor. The second parallel port programmed to form the serial interface. 8-bit transfer clocks the remaining bits B7 through B0 into CS CLK DOUT B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 B1 BYTE 1 BYTE 2 MPU ? O B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 RECEIVED WORD B0 1ST TRANSFER 2ND TRANSFER LTC1292/7 F01
Figure 1. Data Exchange Between LTC1292 and MC68HC11
12927fb 9
O U U W U APPLICATI S I FOR ATIO LTC1292 Operating Sequence
tCYC CS CLK Hi-Z D B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 OUT tSMPL tCONV tSMPL LTC1292/7 AI01
LTC1297 Operating Sequence
tCYC CS tsuCS POWER SHUTDOWN MODE CLK Hi-Z D B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 B1 B2 B3 B4 B5 B6 OUT B7 B8 B9 B10 B11 LTC1292/7 AI02 tSMPL tCONV
Microprocessor Interfaces Motorola SPI (MC68HC11)
The LTC1292/LTC1297 can interface directly (without The MC68HC11 has been chosen as an example of an MPU external hardware) to most popular microprocessors’ with a dedicated serial port. This MPU transfers data MSB (MPU) synchronous serial formats (see Table 1). If an first and in 8-bit increments. A dummy DIN word sent to the MPU without a dedicated serial port is used, then three of data register starts the SPI process. With two 8-bit transfers, the MPU’s parallel port lines can be programmed to form the A/D result is read into the MPU (Figure 1). For the the serial link to the LTC1292/LTC1297. Included here are LTC1292 the first 8-bit transfer clocks B11 through B8 of one serial interface example and one example showing a the A/D conversion result into the processor. The second parallel port programmed to form the serial interface. 8-bit transfer clocks the remaining bits B7 through B0 into CS CLK DOUT B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 B1 BYTE 1 BYTE 2 MPU ? O B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 RECEIVED WORD B0 1ST TRANSFER 2ND TRANSFER LTC1292/7 F01
Figure 1. Data Exchange Between LTC1292 and MC68HC11
12927fb 9
