ADS6125, ADS6124

ADS6123, ADS6122

www.ti.com

SLAS560A–OCTOBER 2007–REVISED MARCH 2008

DEVICE PROGRAMMING MODES

ADS612X has several features that can be easily configured using either parallel interface control or serial interface programming.

USING SERIAL INTERFACE PROGRAMMING ONLY

To program using the serial interface, the internal registers must first be reset to their default values, and the RESET pin must be kept low. In this mode, SEN, SDATA, and SCLK function as serial interface pins and are used to access the internal registers of ADC. The registers are reset either by applying a pulse on the RESET pin, or by a high setting on the <RST> bit (D4 in register 0x00). The Serial Interface section describes register programming and register reset in more detail.

USING PARALLEL INTERFACE CONTROL ONLY

To control the device using parallel interface, keep RESET tied to high (AVDD). Now, SEN, SCLK, SDATA and PDN function as parallel interface control pins. These pins can be used to directly control certain modes of the ADC by connecting them to the correct voltage levels (as described in Table 1 to Table 3). There is no need to apply a reset pulse.

Frequently used functions are controlled in this mode — standby, selection between LVDS/CMOS output format, internal/external reference and 2s complement/straight binary output format. Table 1,Table 2, and Table 3 describe the modes controlled by the parallel pins.