2/24/2008 9T6WP
BCM7405
Preliminary Hardware Data Module
Timing and AC Characteristics
06/29/07
Bro a d c o m C o rp o r a ti o n
Page 1-150
Data Transport Input Timing
Document
7405-1HDM00-R
D
ATA
T
RANSPORT
I
NPUT
T
IMING
Figure 1-35: Data Transport Input Band Timing
Table 1-21: Data Transport Input Band Timing Parameters
Description
Symbol
Min.
Max.
Units
IB_CLK frequency
Fs
–
100
MHz
IB_CLK rise time
1
Trise
–
2
ns
IB_CLK fall time
1
Tfall
–
2
ns
IB_DATA, IB_SYNC Setup Time to IB_CLK active edge (rising or falling)
2
Tsu
4
–
ns
IB_DATA, IB_SYNC Hold Time from IB_CLK active edge (rising or falling)
2
Thd
4
–
ns
1
Rise and Fall time specs are measured from the 10% and 90% VDD levels.
2
The active clock edge for IB_CLK is programmable to either the rising or falling edge.
T
su
T
hd
IB_CLK
(rising edge)
IB_DATA, IB_SYNC
IB_CLK
(falling edge)