DS4000 查看數據表（PDF） - Dallas Semiconductor -> Maxim Integrated

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DS4000

Digitally Controlled TCXO

Dallas Semiconductor -> Maxim Integrated 

DS4000 Digitally Controlled TCXO

READ TEMPERATURE COMMAND

This command reads the last temperature conversion result from the temperature register in the format described

in the Reading Temperature section. If an application can accept temperature resolutions of +1.0°C, then the

master can read the first data byte and follow with a NACK and STOP. For higher resolution, both bytes must be

read.

Table 3. Command Set

INSTRUCTION

FUNCTION

Frequency Select

Register (Note 1)

TCXO Control

Register (Note 1)

Read Temperature

(Note 2)

Frequency Tuning

Register (Note 2)

Defines F2 output frequency

Enables/disables F1 and F2;

sets duty cycle of F2

Reads 10-bit temperature register

Digitally adds/subtracts an offset

from oscillator

PROTOCOL

5Dh

60h

64h

66h

2-WIRE BUS DATA

AFTER ISSUING

PROTOCOL

Read or write 1 data

byte

Read or write 1 data

byte

Read 1 or 2 data bytes

Read or write 1 data

byte

Note 1: The slave does not increment the internal address pointer between instructions. The address pointer must be reinitialized after each

access.

Note 2. If the user only desires 8-bit thermometer readings, the master can read one data byte, and follow with a NACK and STOP. If higher

resolution is required, both bytes must be read.

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