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STLC7550 bảng dữ liệu(PDF) 9 Page - STMicroelectronics |
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STLC7550 bảng dữ liệu(HTML) 9 Page - STMicroelectronics |
9 / 17 page Sampling Period 1/2 Sampling Period (see Note) FS TxDI HC1, HC0 1X Data Word Input Control Word 01 SCLK TxDO Data Word Output Register Word Note : In slave mode, this 1/2 Sampling Period is not mandatory. If 1/2 Sampling Period is not provided, one sample is lost. Figure 8 : Mixed Mode 5 - HOST INTERFACE FUNCTIONAL DESCRIPTION (continued) D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 - D15 D14 - - - - FS SCLK TxDI HC1, HC0 Sampling period 00 or 01 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 - D15 D14 - - - - TxDO Figure 7 : Data Mode The Host interface consist of the shift clock, the frame synchronization signal, the ADC- channel data output, and the DAC-channel data input. Two modes of serial transfer are available : - First : Software mode for 15-bit transmit data transfer and 16-bit receive data transfer - Second : hardware mode for 16-bit data transfer. Both modes are selected by the Hardware Control pins (HC0, HC1). The data to the device, input/output are MSB-first in 2’s complement format (see Table 2). When Control Mode is selected, the device will internally generate an additional Frame Synchroni- zation Pulse (Secondary Frame Synchronization Pulse) at the midpoint of the original Frame Period. If the device is in slave mode the additional frame sync (secondary frame sync pulse) must be gener- ated by the processor. The Original Frame Syn- chronization Pulse will also be referred to as the Primary Frame Synchronization Pulse. Table 2 : Mode Selection HC1 HC0 LSB Useful Data Secondary FSYNC Description 0 0 0 15bits No Software Mode for Data Transfer only. 0 0 1 15bits (+16bits reg.) Yes Software Mode for Data Transfer + Control Register Transfer. 0 1 X 16bits No Hardware Mode for Data Transfer only. 1 X X 16bits (+16bits reg.) Yes Hardware Mode for Data Transfer + Control Register Transfer. STLC7550 9/17 |
Số phần tương tự - STLC7550 |
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Mô tả tương tự - STLC7550 |
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