
TAMC900 User Manual Issue 2.0.1
Page 58 of 71
13.2.10
Jitter Attenuator Control Register (Address 0x12)
Bit
Symbol
Description
Access
Reset
Value
7
-
reserved for future use
R
0
6 SEL2
R/W 0
5 SEL1
R/W 0
4 SEL0
Frequency select pins for QAx and QB0 outputs:
Inputs
Outputs
SEL2 SEL1 SEL0
QA0,
QA1
QB0
0 0 0
2.5x
f
IN
2.5x
f
IN
1 0 0 1x
f
IN
2.5x
f
IN
0 1 0
1.25x
f
IN
2.5x
f
IN
1 1 0
2.5x
f
IN
1.25x
f
IN
0 0 1
2.5x
f
IN
1x
f
IN
1 0 1 1x
f
IN
1.25x
f
IN
0 1 1
1.25x
f
IN
1x
f
IN
1 1 1
1.25x
f
IN
1.25x
f
IN
Input frequency (f
IN
) should be 100 MHz (AMC FCLKA).
R/W 1
3
-
reserved for future use
R
0
2 MR Reset
0 = normal operation
1 = reset device and disable outputs
R/W 0
1
OEB
Output disable for the QB0 clock
0 = enable
1 = disable
R/W 0
0
OEA
Output disable for the QA0 and QA1 clocks
0 = enable
1 = disable
R/W 0
Table 13-11: Jitter Attenuator Control Register (Address 0x12)
Do not change the frequency of QA0/QA1.