MT8985
AC Electrical Characteristics† - GCI Timing
Voltages are with respect to ground (VSS) unless otherwise stated.
‡
Characteristics
Clock Period
Sym
Min
Typ
Max
Units
Test Conditions
1
2
3
4
5
6
tC4i
tCL, tCH
tWFH
tF0iS
150
73
244
122
244
300
150
ns
ns
ns
ns
ns
ns
Pulse Width
Frame Width High
Frame Setup
Frame Hold
10
20
190
190
100
tF0iH
Data Delay/Clock Active to
Active
tDAA
45
C =150 pF
L
7
8
9
Serial Input Setup
Serial Input Hold
tSTiS
tSTiH
tr,tf
20
20
ns
ns
ns
Clock Rise/Fall Time
10
† Timing is over recommended temperature & power supply voltages (VDD=5V±5%, VSS=0V, TA=–40 to 85°C).
‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.
C4i
F0i
STi/
STo
bit 0
bit 1
bit 2
bit 3
Note: bit 0 identifies the first bit of the GCI frame
See Detail a
t
CH
t
t
t
t
r
CL
f
C4i
2.0V
C4i
F0i
0.8V
t
WFH
2.0V
0.8V
t
t
F0iS
F0iH
2.0V
0.8V
STo
STi
t
t
STiH
STiS
t
DAA
2.0V
0.8V
Detail a
Figure 14 - GCI Timing
2-59
MITEL [ MITEL NETWORKS CORPORATION ]
