1.5. Dual-Port RAM Interface
Format1
Format2
ASCII
AM
Time Code
DCLS
0x42
0x34
'B4'
B124
BCD, YR, CF, SBS
B004
0x42
0x35
'B5'
B125
BCD, YR, CF
B005
0x42
0x36
'B6'
B126
BCD, YR
B006
0x42
0x37
'B7'
B127
BCD, YR, SBS
B007
0x42
0x0
'B'
B122
BCD
B002
0x42
0x54
'BT'
AM
Legacy TrueTime
DCLS
0x49
0x0
'I'
AM
IEEE 1344
DCLS
0x45
0x31
'E1'
E121
BCD, CF
E001
0x45
0x32
'E2'
E122
BCD
E002
0x45
0x35
'E5'
E125
BCD, YR, CF
E005
0x45
0x36
'E6'
E126
BCD, YR
E006
0x65
0x31
'e1'
E111
BCD, CF
E001
0x65
0x32
'e2'
E112
BCD
E002
0x65
0x35
'e5'
E115
BCD, YR, CF
E005
0x65
0x36
'e6'
E116
BCD, YR
E006
0x47
0x35
'G5'
G145
BCD, YR, CF
G005
0x4E
0x0
'N'
AM
Nasa 36
DCLS
0x58
0x0
'X'
AM
XR3
DCLS
0x32
0x0
'2'
AM
2137
DCLS
IRIG Control Function (CF) Bits In the following tables, tq1 through tq4 are time quality bits. For time
quality and unlock bits, "1" means active.
For IRIG output codes A, B, E or G with CF bits, the following CF bits are encoded:
Index Bit
count name
----- -----
70
(0)
71
(0)
72
(0)
73
unlock (1 = unit not locked to reference)
74
(0)
75
tq1 (1 = timing error estimate > 1us)
76
tq2 (1 = timing error estimate > 10us)
77
tq3 (1 = timing error estimate > 100us)
78
tq4 (1 = timing error estimate > 1ms)
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