AT30TSE758_14 Datasheet, PDF(26/60 Page) ATMEL Corporation – Digital Temperature Sensor with Nonvolatile Registers

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AT30TSE758_14 Datasheet, PDF (26/60 Pages) ATMEL Corporation – Digital Temperature Sensor with Nonvolatile Registers

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6.4.7

RLCK

The nonvolatile RLCK bit controls the reversible locking of both the Volatile and Nonvolatile Configuration and Limit

Registers. When the RLCK bit is set to the Logic 0 state, the Configuration Register, TLOW Limit Register, THIGH Limit

Register, Nonvolatile Configuration Register, Nonvolatile TLOW Limit Register, and Nonvolatile THIGH Limit Register will be

unlocked and can be modified. Alternatively, when the RLCK bit is set to the Logic 1 state, the Volatile and Nonvolatile

Configuration and Limit Registers will be locked and cannot be modified. When the registers are locked, only the RLCK

bit of the Nonvolatile Configuration Register can be altered and reset back to a Logic 0. Any attempts at changing other

bits in the Nonvolatile Configuration Register will be ignored. The RLCK bit is set from the factory to default to the

Logic 0 state. See Section 7. âRegister Lockingâ on page 31 for more details.

Figure 6-6. Write to Nonvolatile Configuration Register

SCL

SDA

Start

Master

12 3 4 567 89 12 345 67 89

Address Byte

Pointer Register Byte

10 0 1 AAA0 0 00 01 0 00 1 0

MSB

ACK

from

Slave

ACK

from

Slave

12 3 4 567 89 12 345 67 89

Nonvolatile Configuration Register

Upper Byte

Nonvolatile Configuration Register

Lower Byte

D15 D14 D13 D12 D11 D10 D9 D8 0 D7 D6 D5 D4 D3 D2 D1 D0 0

MSB

ACK

from

Slave

ACK

from

Slave

Stop

Master

Figure 6-7. Read from Nonvolatile Configuration Register

SCL

SDA

Start

Master

12 3 4 567 89 12 345 67 89 123 45 67 89

Address Byte

Nonvolatile Configuration Register

Upper Byte

Nonvolatile Configuration Register

Lower Byte

1 0 0 1 A A A 1 0 D15 D14 D13 D12 D11 D10 D9 D8 0 D7 D6 D5 D4 D3 D2 D1 D0 1

MSB

ACK

from

Slave

ACK

from

Master

NACK

from

Master

Stop

Master

Note:

Assumes the Pointer Register was previously set to point to the Nonvolatile Configuration Register.

26 AT30TSE752/754/758 [DATASHEET]

Atmel-8751F-DTS-AT30TSE752-754-758-Datasheet_092013

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