LSI Logic Confidential
18-44
Specifications
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
18.2.15 1394 Timing
1394 signal level parameters are shown in
and described
in
Figure 18.34 SBP Signal Level Parameters
Table 18.29 SPI Interface Timing Parameters
Param
Description
Min
Max
T
CYC
SIO_SPI_CLK cycle time (frequency)
0.2 ms (37.5 MHz) 26 ns(4.6 kHz)
T
1
Delay time, SIO_SPI_CLK edge to
SIO_SPI_MOSI active
2 10 ns
2 30 ns
T
2
Assertion, SIO_SPI_CS to SPI_CLK edge
1
1. These values are programmed in the SPI Configuration register.
0 ns
91 ns
T
3
Deassertion, SPI_CLK edge to SIO_SPI_CS
1
0 ns
91 ns
T
4
Setup time, SIO_SPI_MISO to SPI_CLK edge
3 cycles
T
5
Hold time, SIO_SPI_MISO to SPI_CLK edge
3 cycles
70%
50%
30%
T
CYC
T
HIGH
T
LOW
T
2
T
1
Table 18.30 1394 AC Timing Parameters
Param
Description
Min
Max
Unit
T
CYC
BIO_PHY_CLK frequency
49.152
±
100 ppm
49.152
±
100 ppm
MHz
T
HIGH
BIO_PHY_CLK High time
T
LOW
BIO_PHY_CLK Low time
BIO_PHY_CLK duty cycle
45
55
%
T
1
BIO_PHY_CLK Rise time
0.7
2.4
ns
T
2
BIO_PHY_CLK Fall time
0.7
2.4
ns