MTC-20280
ISDN/IDSL Terminal Controller
GCI Interfaces
Figure 3 : GCI Bus Signal Timing
Timing reference voltages
Signal
Output
Input
High
2.4V
2.0V
Low
0.4V
0.8V
Signal
DCLK
DCLK
DFR
DFR
DFR
DFR
DFR
DOUTx
DOUTx
DIN
DIN
Mnem.
tDCL
twL, twH
tsF
tr, tf
twFH
twFL
tfH
tdDC
tdDF
tsD
thD
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Min.
239
90
70
130
tDCL
50
100 (1)
150 (1)
twH+20
50
Max.
Parameter
Clock period
Pulse width
Frame
Frame rise/fall
Frame width H
Frame width L
Frame hold
Data delay, clock
Data delay, frame
Data set-up
Data hold
tDCL-50
60
Note (1). Capacitive load = 150 pF.
6