STC5428 Datasheet, PDF (56/66 Pages) Connor-Winfield Corporation – Synchronous Clock for SETS

Frame8K_Sel, 0x59 (R/W)
Frame2K_Sel, 0x5A (R/W)
STC5428
Synchronous Clock for SETS
DATASHEET
Address
Bit7
0x59
0x5A
Bit6
Invert
Invert
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Duty Cycle Select for Frame8K or put CLK8K into tri-state
Duty Cycle Select for Frame2K or put CLK2K into tri-state
Selects duty cycle of the Frame8K and Frame2K generated from synthesizer F and determine frame edge is
rising or falling. Set 0 Bit5~0 to put CLK8K/CLK2K into tri-state or put Frame8K/Frame2K of synthesizer F to
ground.
Bit 5 ~ 0
0
1~62
63
Duty Cycle Select
Put CLK8K/CLK2K into tri-state or put Frame8K/Frame2K to ground
Pulse width 1 to 62 cycle of 155.52MHz
50% duty cycle
Bits 6
0
1
Default value: 0 (Tri-state/ground, not inverted)
Invert
Not inverted (frame on rising edge)
Inverted (frame on falling edge)
Ref_Acceptable_Freq, 0x5B (R/W)
Address
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0x5B
0x5C
Not used
Lower 8 bits of integer N Select
Higher 7 bits of integer N Select
Enable frequency auto detect function or set integer N for the manual acceptable reference frequency for indi-
vidual reference input.
Setting this register to 0 to enable the automatic detection for reference input which is selected at the register
Ref_Index_Selector. The auto-detect acceptable reference input frequencies are shown in Table 3.
Select the integer N for the manually acceptable reference at frequency of Nx8kHz (N is integer from 1 to
32767) for REF1 ~ REF12. Which of reference input is selected for the manually acceptable reference is
depending on the index selected at the register Ref_Index_Selector.
Setting integer N (from 1 to 32767) at this register allows user to manually select the acceptable reference
input frequency at the integer multiple of 8kHz, range from 8kHz to 262.136MHz. For instance, user can select
integer N = 19440 to manually accept frequency at 19440x8kHz = 155.52MHz.
Field Value
0
1~32767
Integer N Select
Enable auto detection for reference
input
Integer N for the manual acceptable
reference frequency
Page 56 of 66
Preliminary
Rev: 0.2
© Copyright the Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
Date: April 3, 2014