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21.5.1.4 SDR Register (Offset = 8h) [reset = X]

SDR is shown in Figure 21-17 and described in Table 21-6.

Slave Data This register contains the data to be transmitted when in the Slave Transmit state, and the

data received when in the Slave Receive state.

Figure 21-17. SDR Register

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

RESERVED DATA

R-X R/W-X

Table 21-6. SDR Register Field Descriptions

Bit Field Type Reset Description

31-8 RESERVED R X

Software should not rely on the value of a reserved. Writing any

other value than the reset value may result in undefined behavior.

7-0 DATA R/W X

Data for transfer This field contains the data for transfer during a

slave receive or transmit operation. When written the register data is

used as transmit data. When read, this register returns the last data

received. Data is stored until next update, either by a system write

for transmit or by an external master for receive.

1396

SWCU117A–February 2015–Revised March 2015

Inter-Integrated Circuit (I

C) Interface

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