COBHAM GR740 User Manual

GR740-UM-DS, Nov 2017, Version 1.7 449 www.cobham.com/gaisler
GR740
39.5.11 SpaceWire debug interface timing
This specifies the timing for the SpaceWire debug interface that shares pins with the slow interfaces.
The timing waveforms are shown in figure 63. Timing parameters are defined in table 587.
Table 588.Timing parameters
Name Parameter Reference edge Min Max Unit
t
SPW0
transmit clock period - see Table 579
t
SPWD1
clock to output delay - - - not applicable
t
SPWD2
input to clock hold - - - not applicable
t
SPWD3
input to clock setup - - - not applicable
t
SPWD4
output data bit period - 20 - ns
t
SPWD5
input data bit period - 20 - ns
t
SPWD6
data & strobe edge separation -
10
1) 2)
-ns
t
SPWD7
data & strobe output skew - -5
5
2)
ns
1)
Assuming SpaceWire PLL used in nominal configuration
2)
Verified by static timing analysis only, not tested
Figure 64. Timing waveforms
t
SPWD1
spwd_txd
internal spw_clk
t
SPWD1
t
SPWD2
spwd_rxd t
SPWD3
spwd_txs
spwd_rxs
t
SPW0
spwd_txd
spwd_txs
t
SPWD4
t
SPW4
t
SPWD4
spwd_rxd
spwd_rxs
t
SPWD5
t
SPWD5
t
SPWD5
spwd_txd
spwd_txs
t
SPWD7
t
SPWD6
t
SPWD6

COBHAM GR740 Specifications

General

Brand	COBHAM
Model	GR740
Category	Computer Hardware
Language	English