SM3G Datasheet, PDF (13/36 Pages) Connor-Winfield Corporation – ULTRA MINIATURE STRATUM 3 MODULE

Register Descriptions and Operation continued
Op_Mode, 0x05 (R/W)
Bit 7 ~ Bit 5
Reserved
Bit 4
Master or Slave Mode
1: Master
0: Slave
(Read Only)
Bit 3 ~ Bit 0
Free Run, Locked, or Hold Over:
0000: Free Run mode
0001: Locked on Ref1
0010: Locked on Ref2
0011: Locked on Ref3
0100: Locked on Ref4
0101 - 1000: Not Used
1001 - 1111: Hold Over
Max_Pullin_Range, 0x06 (R/W)
Maximum pull-in range in 0.1 ppm unit
Bit 7 ~ Bit 0
This register should be set according to the values specified by the standards (GR-1244) appropriate for the particular
stratum of operation. The power-up default value is 10 ppm. (= 4.6ppm aging + 4.6 ppm pullin + margin).
M/S_Activity, 0x07 (R)
Bit 7 ~ Bit 4
Reserved
Indicates signal presence and auto-detected frequency for the M/S REF input.
Bit 3 ~ Bit 0
Cross reference activity
0000: No signal
0001: 8kHz
0010:1.544 MHz
0011:2.048MHz
0100: 12.96MHz
0101: 19.44MHz
0110: 25.92MHz
0111: 38.88MHz
1000: 51.84MHz
1001: 77.76MHz
1010-1111: Reserved
Ref_Activity, 0x08 (R)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
x: Don’t
Care
x: Don’t
Care
x: Don’t
Care
x: Don’t
Care
ref4 activity
1: on
0: off
ref3 activity
1: on
0: off
ref2 activity
1: on
0: off
ref1 activity
1: on
0: off
Each bit indicates the presence of a signal for that reference. Reference bits 4-7 are not used but may be 1 or 0.
SM3G5 Data Sheet #: TM083 Page 13 of 36 Rev: 05 Date: 01/26/11
© Copyright 2011 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice