DS4000 Dallas Semiconducotr, DS4000 Datasheet - Page 10

• Manufacturer Part Number: DS4000
• Description: Digitally Controlled TCXO
• Manufacturer: Dallas Semiconducotr

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
Note 1: The slave does not increment the internal address pointer between instructions. The address pointer must be reinitialized after each
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
Frequency Select
Register (Note 1)
TCXO Control
Register (Note 1)
Read Temperature
(Note 2)
Frequency Tuning
Register (Note 2)
INSTRUCTION
access.
resolution is required, both bytes must be read.
Defines F
Enables/disables F
sets duty cycle of F
Reads 10-bit temperature register
Digitally adds/subtracts an offset
from oscillator
2
output frequency
FUNCTION
1
2
and F
2
;
10 of 16
PROTOCOL
5Dh
60h
64h
66h
Read or write 1 data
byte
Read or write 1 data
byte
Read 1 or 2 data bytes
Read or write 1 data
byte
2-WIRE BUS DATA
AFTER ISSUING
PROTOCOL