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FIGURE 27 – NORMAL MODE TRANSMIT OR RECEIVE TIMING
(These signals are to and from the Hybrid)
nPULSE2
Parameter
min
max
units
nPULSE1
t1
* t1, t6 = .25 x (
1
) for data rates other than 2.5 Mpbs.
data rate
t2
t1
t3
typ
* t2,t7 = 8 x (crystal period) for clock frequencies other than 20
MHz.
This period applies to data of two consecutive one's.
RXIN
t6
t7
TXEN
t2
t4
t5
LAST BIT
(400 nS BIT TIME)
** t4: For clock frequencies other than 20 MHz, t4 = 18 x (crystal period) ± 50 nsec.
** t5: For clock frequencies other than 20 MHz, t5 = 6 x (crystal period) ± 50 nsec.
Note: Clock frequency for 5 Mbps is 40 MHz.
t1
t2
t3
t4
t5
t6
t7
PULSE1, PULSE2 Pulse Width
PULSE1, PULSE2 Period
PULSE1, PULSE2 Overlap
TXEN Low to PULSE1 Low**
Beginning of Last Bit Time to TXEN High**
RXIN Pulse Width
RXIN Period
-10
850
250
10
100*
400*
0
100*
400*
+10
950
350
nS
nS
nS
nS
nS
nS
nS
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