Datasheet

THS1206

SLAS217H – MAY 1999 – REVISED JULY 2003#

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ADC CONTROL REGISTER

The THS1206 contains two 10-bit wide control registers (CR0, CR1) in order to program the device into the desired mode.

The bit definitions of both control registers are shown in Table 7.

Table 7. Bit Definitions of Control Register CR0 and CR1

REG BIT 9 BIT 8 BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

CR0 TEST1 TEST0 SCAN DIFF1 DIFF0 CHSEL1 CHSEL0 PD MODE VREF

CR1 RBACK OFFSET BIN/2’s R/W DATA_P DATA_T TRIG1 TRIG0 OVFL/FRST RESET

Writing to Control Register 0 and Control Register 1

The 10-bit wide control register 0 and control register 1 can be programmed by addressing the desired control register and

writing the register value to the ADC. The addressing is performed with the upper data bits D10 and D11, which function

in this case as address lines RA0 and RA1. During this write process, the data bits D0 to D9 contain the desired control

Table 8. Control Register Addressing

D0 – D9 D10/RA0 D11/RA1 Addressed Control Register

Desired register value 0 0 Control register 0

Desired register value 1 0 Control register 1

Desired register value 0 1 Reserved for future

Desired register value 1 1 Reserved for future