RM0352 datasheet(95/138 Pages) STMICROELECTRONICS

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RM0352

I2C bus interface

137

10.2.16

I2C setup time START condition F/S (I2C_TSUSTA_FST_STD)

Table 86. I2C setup time START condition F/S (I2C_TSUSTA_FST_STD)

Address:

I2CBaseAddress + 0x058

Type:

Reset:

0x001D00E2

Description:

The I2C_TSUSTA_FST_STD register, that controls the SETUP time START

condition for F/S mode. The register is read-write.

10.2.17

SMBUS slave control register (I2C_SMB_SCR)

Table 87. SMBUS slave control register (I2C_SMB_SCR)

Address:

I2CBaseAddress + 0x060

Type:

Reset:

0x00000000

Description:

SMBUS slave control register (SMBUS MODE)

Note:

The LENGTH is used in the slave transmitter to send PEC and in the slave receiver to check

PEC when the I2C_CR:SMBUS = '1' and I2C_CR:ENPEC = '1'.

The PEC is not included: i.e LENGTH = SIZE-OF (data, command, Byte count).

I2C setup time START condition F/S (I2C_TSUSTA_FST_STD)

31 30

26 25 24 23

18 17 16 15 14 13

12 11 10

RESERVED

I2C_TSUSTA_FST

RESERVED

I2C_TSUSTA_STD

RRW

[24:16]

I2C_TSUSTA_FST: setup time START condition value for fast mode

according to fast mode. Once the counter is expired the START condition is

generated.

[8:0]

I2C_TSUSTA_STD: setup time START condition value for standard mode.

After a non-stop in SCL line the decimeter loads the value of the

I2C_TSUSTA_STD according to standard mode. Once the counter is expired

the START condition is generated.

SMBUS slave control register (I2C_SMB_SCR)

28 27

14 13

RESERVED

LENGTH

DSA7

DUAL

RRW

[18:8]

LENGTH: The I2C_SMB_SCR registers transaction length. Defines the

length, in terms of number of bytes to be transmitted or received. In case of

read-from-slave operation or write-to- slave.

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