STC5420 Datasheet, PDF (13/70 Pages) Connor-Winfield Corporation – Synchronous Clock for SETS

Input and Output Frequencies
STC5420
Synchronous Clock for SETS
Data sheet
Input Frequencies
Auto-Detect Acceptable Input Frequencies
The STC5420 can automatically detect the frequency of the reference input when the user enable the auto-
detect function at the register Ref Index Selector and Ref Acceptable Freq for REF1~REF12 individually.
REF11 and REF12 are LVPECL/LVDS. The acceptable frequency for auto detection is shown in Table 4.
Table 4: Auto-Detect Acceptable Ref Input Frequencies
Reference Input
REF1 ~ REF 12
REF7²
EX_SYNC³
Frequency
8 kHz
64 kHz
19.44 MHz
38.88 MHz
77.76 MHz
1.544 MHz
2.048 MHz
6.48 MHz
8.192 MHz
16.384 MHz
25 MHz
50 MHz
125 MHz
Proprietary Composite signal
Proprietary Composite signal,
2kHz or 8kHz external frame sync inputs
Manually Acceptable Input Frequencies
STC5420 provides another option which allows the user to select the manually acceptable reference frequency
for REF1~REF12 individually, at the integer multiple of 8kHz (Nx8kHz, N is integer from 1 to 32767). Hence the
manually acceptable reference frequency range is 8kHz to 262.136MHz, in 8kHz steps. When a manually
acceptable reference frequency is used, the user need to access the register Ref Acceptable Freq to set the
integer N for associated reference input selected at the register Ref Index Selector.
Input Frequency = N x 8kHz, where N = 1~32767
Note 2:
In slave mode configuration, REF7 can also accept proprietary composite signal as input besides the high frequencies shown in Figure 3.
Note 3:
In both master and slave mode configuration, EX_SYNC may accept proprietary composite signal and 2kHz or 8kHz external frame reference inputs.
Page 13 of 70
Rev:2.0
© Copyright the Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
Date: September 28, 2011