RV-3029 Datasheet, PDF (18/67 Pages) MICORO CRYSTAL SWITZERLAND – DTCXO Temperature Compensated Real Time Clock

Micro Crystal
DTCXO Temperature Compensated Real Time Clock / Calendar Module
RV-3029
3.5. TIMER PAGE REGISTER FUNCTION
The Timer Page contains 2 registers forming a 16-bit count down timer value.
Countdown Timer Value (addresses 18h / 19h…bits description)
Address
Function
Bit 7
Bit 6
Bit 5
Bit 4
18h
Timer Low
19h
Timer High
128
64
32
16
128
64
32
16
Bit 3
8
8
Bit 2
4
4
Bit 1
2
2
Bit 0
1
1
Address
18h
19h
Symbol
Timer Low
Timer High
Value
1 to 255
0 to 255
Description
These bits hold the Low Countdown Timer Value in binary format
These bits hold the High Countdown Timer Value in binary format
3.6. TEMPERATURE PAGE REGISTER FUNCTION
The Temperature Page register contains the result of the measured temperature ranging from -60°C (=0d) to
+190°C (=250d) with 0°C corresponding to a content of =60d.
During read / write access, the content of the register Temperature is frozen in a cache memory to prevent faulty
reading.
When the Thermometer is disabled by ThE = “0” (bit 1 in register EEPROM_Control), the register Temperature at
address 20h can be externally written.
Temperature Value (address 20h…bits description)
Address
Function
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3 Bit 2 Bit 1
20h
Temperature
128
64
32
16
8
4
2
Address
20h
Symbol
Temperature
Value
-60 to
+194°C
Description
These bits hold the Temperature Value coded in binary format
Bit 0
1
3.7. EEPROM DATA PAGE REGISTER FUNCTION
The EEPROM Data Page contains 2 non-volatile EEPROM registers for user’s application.
Please see section 4.3 EEPROM MEMORX ACCESS for detailed instructions how to handle EEPROM read / write
access.
User EEPROM Data Registers (addresses 28h / 29h…bits description)
Address
Function
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3 Bit 2
28h
EEPROM User
29h
EEPROM User
128
64
32
16
8
4
128
64
32
16
8
4
Address
28h
29h
Symbol
EEPROM User
EEPROM User
Value
0 to 255
0 to 255
Description
EEPROM User Data (2 Bytes)
Bit 1
2
2
Bit 0
1
1
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