CME8000-BUS-LP-03 C-Max, CME8000-BUS-LP-03 Datasheet - Page 8

• Manufacturer Part Number: CME8000-BUS-LP-03
• Description: MODULE BUS PCB W/RS485 HALF DUP
• Manufacturer: C-Max

Specifications of CME8000-BUS-LP-03

• Frequency: 40kHz ~ 120kHz
• Sensitivity: -115dBm
• Modulation Or Protocol: UTC - Universal Time Code
• Applications: Radio Controlled Time
• Current - Receiving: 2mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: On-Board, Wire Antenna
• Voltage - Supply: 2.7 V ~ 5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Data Rate - Maximum: -

Data Sheet
CME8000-
SPEC No.
BUS
3.2.2
3.2.3
3.2.4
3.2.5 RD_RX_STATUS
CME8000-BUS
Upon reception of a time stream, comparisons with previous data, both from 24hours
before or from the minute before if any will be performed. If the recent minute’s data
coincides with 2 of the previous data, the reception is considered as successful and the
time data will be updated to the RTC. This comparison algorithm usually compares all
data available including hour, minute, date, month, day of the week, year and special
bits (that is daylight saving bits) information. To speed up reception in weak signal, in
some exceptional case like for a product which only shows the hour and minute, other
time data can be neglected.
SET_RX_TIME
This command sets the auto reception time of the day in hours.
Bits 0 to 5 : Sets in binary form the hour of the day in 24 hours system when the auto
reception starts.
T1, T2: Sets the interval between the number of auto receptions per day as set in
SET_RX_CTRL. For example, if T1, T2 = 10, and C0,C1 = 11, then there will be 3
auto receptions per day in intervals of 2 hours apart.
SET_RX_DUR
This command sets the maximum time of duration for each reception trial in minutes.
The maximum duration that can be set is 30 minutes, the minimum duration that must
be set is 3 minutes. This applies for dual and multi-frequency reception as well, for
example, dual JJY40 and JJY60 together has maximum reception duration of 30
minutes, the minimum duration that must be set is 3 minutes.
SET_NO_CMP
This command sets the time information not to be compared from the received time
stream. Upon setting of the specified bit, for example setting bit 4 means the year data
will not be analysed and compared in the comparison algorithm of reception.
This command allows the requestor to know the reception mode that the unit is working
under, for example, whether it is under dual JJY or single band DCF etc. It also tells the
requestor whether :
i)
ii)
Revision
B6
the unit is BUSY (set to 1) i.e. under reception, then at the same time also
showing the BSI value (refreshed every second), or
the unit is not under reception (OFF set to 1), or
26.07.05
State
C-MAX printed
26.07.2005
English
Version
C-MAX
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