LSI Logic Confidential
18-36
Specifications
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
18.2.11 JTAG Interface Signal Timing
The timing parameters for the JTAG interface are shown in
and described in
Table 18.24 IR AC Timing Parameters
Symbol
Description
Min
Max
T
1
IRTX modulated signal pulse: user can program overall
period of IRTX waveform in units of carrier wave cycles.
0x0 + 1
carrier cycles
0x3ff + 1
carrier cycles
T
2
IRTX modulated signal pulse Low: user can program duty
cycle of IRTX waveform in units of carrier wave cycles.
0x0 + 1
carrier cycles
0xff + 1
carrier cycles
T
3
IRTX carrier wave period: user can program period of
carrier waveform in units of system clock cycles.
0x0 + 1
sys clock
cycles
1
sys clock
cycles
T
4
IRTX modulated signal pulse High: user can program duty
cycle of carrier waveform in units of system clock cycles.
0x0 + 1
sys clock
cycles
1
sys clock
cycles
T
5
IRRX receive tick period: User can program length of an
“IR tick” in terms of system clock cycles.
0x0 + 1 sys
clock cycles
1 sys
clock cycles
T
6
IRRX receive tick count: IR module counts number of IR
ticks between successive falling (or rising) edges of IRRX.
0x0 + 1
IR ticks
0xff + 1
IR ticks
T
7
IRRX receive high tick count: IR module counts number of
IR ticks that IRRX is high.
0x0 + 1
IR ticks
0xff + 1
IR ticks
Содержание DMN-8600
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