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START A CONVERTER FUNCTION (CONTROL BYTE 1)

ControlByte1Write

(

)

SCLK

SDI

(MOSI)

MSB

LSB

TSC2006

SBAS415A – JUNE 2007 – REVISED NOVEMBER 2007

Table 10. Internal Register Map

READ/WRITE

X measurement result

Y measurement result

Z1 measurement result

Z2 measurement result

AUX measurement result

Temp1 measurement result

Temp2 measurement result

Status

AUX high threshold

R/W

AUX low threshold

R/W

Temp high threshold (apply to both TEMP1 and TEMP2)

R/W

Temp low threshold (apply to both TEMP1 and TEMP2)

R/W

CFR0

R/W

CFR1

R/W

CFR2

R/W

Converter function select status

R/W—Register read and write control. A '1' indicates the contents of the internal register addressed by A3-A0 are

sent to SDO at the next SPI interface clock cycle. A '0' indicates the data following Control Byte 0 on SDI are

written into registers addressed by A3-A0.

Control Byte 1 must begin with D7 = 1, as shown in Figure 31. Control Byte 1 starts the converter function that is

chosen by C3-C0, as shown in Table 7. After sending Control Byte 1, the master does not need to hold CS low,

and can release CS for operating other slave devices that share the same SCLK. After the converter function

completes or stops, the preprocessed data or data set are stored in data registers and can be read by sending

Control Byte 0 with Read Bit and a proper address in A3-A0. For the detailed operating procedures, see the

Operation section.

Figure 31. Interface Timing — Control Byte 1

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