GLM COMPLIANT SERIAL INTERFACE CIRCUITS
S2044/S2045
RCLKN Timing Table
Parameter
2
Symbol
Min.
Max.
Units
Comments
Frequency
26.5625 MHz
53.125 MHz
f
25.5598
53.119
25.5652
53.131
MHz
This is dependent on
the link rate and the
data path width.
3
Period in Lock
t
18.36
18.83
9.412
5.8
ns
ns
ns
ns
ns
In frequency lock .
p
Out of Lock Period
(f=26.5625 MHz)
t
t
Not in frequency lock.
Not in frequency lock.
oolp
oolp
Out of Lock Period
(f=53.125 MHz)
RCLKN Low Time
(f=53.125 MHz)
t
low
RCLKN High Time
(f=53.125 MHz)
t
6.5
high
RCLKN Duty Cycle
(f=26.5625 MHz)
40%
2.5
60%
period
ns
In frequency lock.
RX Setup to RCLKN
(f=53.125 MHz)
t
t
s
s
h
RX Setup to RCLKN
(f=26.5625 MHz)
6.0
ns
RX Hold From RCLKN
RCLK/RCLKN Rise Time
RCLKN Fall Time
t
7.5
.75
0.7
ns
ns
ns
This applies to the
RCLKN output.
t
2.4
3.0
r
This applies to the
RCLKN output.
t
f
2. All parameters are for outputs driven into a 35pf lumped capacitive load.
3. This is the absolute minimum RCLKN period while in frequency lock and must account for any
adjustments to the clock to allow for a change in phase or frequency on the received serial link.
18
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
