Rainbow Electronics ATA6824 - Manual (Page 9)

9
4931C–AUTO–09/06
ATA6824 [Preliminary]
Figure 5-3. Definition of Bus Timing Parameters
The recessive BUS level is generated from the integrated 30 k
Ω
pull-up resistor in series with an
active diode. This diode prevents the reverse current of VBUS during differential voltage
between VSUP and BUS (V
BUS
> V
SUP
).
t
Bit
TH
Rec(min)
TH
Dom(min)
TH
Rec(max)
Thresholds of
receiving node 2
Thresholds of
receiving node 1
TH
Dom(max)
t
Bus_dom(max)
t
Bus_rec(min)
t
Bus_dom(min)
t
rx_pdr(2)
t
rx_pdf(2)
t
rx_pdf(1)
t
rx_pdr(1)
t
Bus_rec(max)
t
Bit
t
Bit
V
S
(Transceiver
supply
of transmitting
node)
RXD
(output of receiving Node 2)
RXD
(output of receiving Node 1)
TXD
SIO Bus Signal
(input to transmitting Node)