TXC-06412BIOG Transwitch Corporation, TXC-06412BIOG Datasheet - Page 73

• Manufacturer Part Number: TXC-06412BIOG
• Manufacturer: Transwitch Corporation

Specifications of TXC-06412BIOG

• Lead Free Status / RoHS Status: Not Compliant

Notes:
1. The relationship between the External Frame Reference pulse input (REFTXFS lead) and System Frame Reference
2. An additional offset of 0 to 9719 clock cycles (77.76 MHz clock) can be inserted between REFTXFS and REFSYSFS by
3. The External Frame Reference Pulse input (REFTXFS lead) can be sampled at both positive or negative clock edge of
7 3 o f 2 2 6
REFTXFS synchronous to LINETXCLK (at 77.76 MHz):
offset between REFTXFS and REFSYSFS
REFTXFS synchronous to LINETXCLK (at 77.76 MHz):
offset between REFTXFS and REFSYSFS
Pulse is only useful when LINETXCLK is configured to 77.76 MHz. Because of this the period of LINETXCLK used in
the timing diagrams above is 12.86 ns.
configuring ExtFramePulseOffset, see
shown correspond to a delay of 0 clock cycles
LINETXCLK (when at 77.76 MHz). The sample edge is configured by setting ExtFramePulseNegEdge, see
Generator Common Configuration (T_RT_Common_Config)” on page
rising edge of LINETXCLK, the offset between REFTXFS and REFSYSFS is always equal to (2 +
ExtFramePulseOffset) clock cycles (77.76 MHz clock), independent from the value of ExtFramePulseNegEdge. When
REFTXFS is synchronous to the falling edge of LINETXCLK, the offset between REFTXFS and REFSYSFS is equal to
(1.5 + ExtFramePulseOffset) clock cycles when ExtFramePulseNegEdge = 0, and (2.5 + ExtFramePulseOffset) clock
cycles (77.76 MHz) when ExtFramePulseNegEdge = 1.
Parameter
“Locking on External Frame Reference Pulse” on page
- Timing Characteristics -
t
t
Symbol
OFFSET
OFFSET
200. when REFTXFS is synchronous to the
Min
1.5
PRELIMINARY TXC-06412B-MB, Ed. 2
Typ
2.5
2
PHAST-12P Device
123. The waveforms
Max
DATA SHEET
TXC-06412B
t
t
June 2005
Unit
CYC
CYC
“Pointer