Measured

Temperature

T

HIGH

T

LOW

FH Bit

(

Transparent Mode)

Read of Configuration Register

Time

FL Bit

(

Transparent Mode)

FH Bit

(Latch Mode)

FL Bit

(Latch Mode)

TMP104

SBOS564A

– NOVEMBER 2011 – REVISED NOVEMBER 2011

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CONFIGURATION REGISTER

The Configuration Register is an 8-bit read/write register used to store bits that control the operational modes of

the temperature sensor. Read/write operations are performed LSB first. The format and power-up/reset value of

the Configuration Register is shown in Table 6.

Table 6. Configuration and Power-Up/Reset Format

D7

D6

D5

D4

D3

D2

D1

D0

INT_EN

CR1

CR0

FH

FL

LC

M1

M0

0

0

0

0

0

0

1

0

Temperature Watchdog Function (FH, FL)

The TMP104 contains a watchdog function that monitors device temperature and compares the result to the

then the flag-high bit (FH) in the Configuration Register is set to '1'. If the temperature falls below value in the

temperature window set by the temperature limit registers, as shown in Figure 11.

Figure 11. Temperature Flag Functional Diagram

The latch bit (LC) in the Configuration Register is used to latch the value of the flag bits (FH and FL) until the

master issues a read command to the Configuration Register. The flag bits are set to '0' if a read command is

received by the TMP104, or if LC = 0 and the temperature is within the temperature limits. The power-on default

values for these bits are FH = 0, FL = 0, and LC = 0.

12

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