 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AD7612 Datasheet(PDF) 25 Page - Analog Devices |
|
||||||||||||||||||||||||||||||
AD7612 Datasheet(HTML) 25 Page - Analog Devices |
|
|
25 / 32 page  Data Sheet AD7612 Rev. A | Page 25 of 32 8-Bit Interface (Master or Slave) The BYTESWAP pin allows a glueless interface to an 8-bit bus. As shown in Figure 38, when BYTESWAP is low, the LSB byte is output on D[7:0] and the MSB is output on D[15:8]. When BYTESWAP is high, the LSB and MSB bytes are swapped; the LSB is output on D[15:8] and the MSB is output on D[7:0]. By connecting BYTESWAP to an address line, the 16-bit data can be read in two bytes on either D[15:8] or D[7:0]. This interface can be used in both master and slave parallel reading modes. CS RD BYTESWAP PINS D[15:8] PINS D[7:0] HI-Z HI-Z HIGH BYTE LOW BYTE LOW BYTE HIGH BYTE HI-Z HI-Z t12 t12 t13 Figure 38. 8-Bit and 16-Bit Parallel Interface SERIAL INTERFACE The AD7612 has a serial interface (SPI-compatible) multiplexed on the data pins D[15:2]. The AD7612 is configured to use the serial interface when SER/PAR is held high. Data Interface The AD7612 outputs 16 bits of data, MSB first, on the SDOUT pin. This data is synchronized with the 16 clock pulses provided on the SDCLK pin. The output data is valid on both the rising and falling edge of the data clock. Serial Configuration Interface The AD7612 can be configured through the serial configuration register only in serial mode as the serial configuration pins are also multiplexed on the data pins D[15:12]. Refer to the Hardware Configuration section and Software Configuration section for more information. MASTER SERIAL INTERFACE The pins multiplexed on D[10:2] and used for master serial inter- face are DIVSCLK[0], DIVSCLK[1], EXT/INT, INVSYNC, INVSCLK, RDC, SDOUT, SDCLK and SYNC. Internal Clock (SER/PAR = high, EXT/INT = Low) The AD7612 is configured to generate and provide the serial data clock, SDCLK, when the EXT/INT pin is held low. The AD7612 also generates a SYNC signal to indicate to the host when the serial data is valid. The SDCLK, and the SYNC sig- nals can be inverted, if desired using the INVSCLK and INVSYNC inputs, respectively. Depending on the input, RDC, the data can be read during the following conversion or after each conver- sion. Figure 39 and Figure 40 show detailed timing diagrams of these two modes. Read During Convert (RDC = High) Setting RDC = high allows the master read (previous conversion result) during conversion mode. Usually, because the AD7612 is used with a fast throughput, this mode is the most recommended serial mode. In this mode, the serial clock and data toggle at appro- priate instances, minimizing potential feed through between digital activity and critical conversion decisions. In this mode, the SDCLK period changes since the LSBs require more time to settle and the SDCLK is derived from the SAR conversion cycle. In this mode, the AD7612 generates a discontinuous SDCLK of two different periods and the host should use an SPI interface. Read During Convert (RDC = Low, DIVSCLK[1:0] = [0 to 3]) Setting RDC = low allows the read after conversion mode. Unlike the other serial modes, the BUSY signal returns low after the 16 data bits are pulsed out and not at the end of the conversion phase, resulting in a longer BUSY width (refer to Table 4 for BUSY timing specifications). The DIVSCLK[1:0] inputs control the SDCLK period and SDOUT data rate. As a result, the maximum through- put cannot be achieved in this mode. In this mode, the AD7612 also generates a discontinuous SDCLK however, a fixed period and hosts supporting both SPI and serial ports can also be used. |
Similar Part No. - AD7612_15 |
|
Similar Description - AD7612_15 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
