TXC-06312BIOG Transwitch Corporation, TXC-06312BIOG Datasheet - Page 66

• Manufacturer Part Number: TXC-06312BIOG
• Manufacturer: Transwitch Corporation

Specifications of TXC-06312BIOG

• Lead Free Status / Rohs Status: Supplier Unconfirmed

PRELIMINARY TXC-06312B-MB, Ed. 2
June 2005
PHAST-12N Device
DATA SHEET
TXC-06312B
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
LINETXCLK
LINETXCLK clock pulse width
REFTXFS pulse width
REFSYSFS pulse width
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
Common Configuration (T_RT_Common_Config)” on page
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
173. when REFTXFS is synchronous to the rising edge of
t
PW_SYSFS
t
PW_TXFS
t
t
Symbol
OFFSET
OFFSET
t
t
PWH
CYC
-
12.86
Min
1.5
40
12.86
12.86
Typ
2.5
50
2
12.86
113. The waveforms
Max
60
6 6 o f 2 0 2
%t
“Retimer
t
t
Unit
CYC
CYC
ns
ns
ns
CYC