IXP42X Datasheet, PDF (127/134 Pages) Intel Corporation – Intel® IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor

Intel^® IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
5.5.2.9
JTAG
Figure 42. Boundary-Scan General Timings
JTG_TCK
JTG_TMS, JTG_TDI
JTG_TDO
T_bsoh
T_bsel
T_bsch
T_bsis
T_bsih
T_bsod
Figure 43. Boundary-Scan Reset Timings
B0416-01
JTG_TRST_N
T_bsr
Table 65.
JTG_TMS
T_bsrs T_bsrh
Boundary-Scan Interface Timings Values
A9597-01
Symbol
Parameter
Conditions
Min. Typ.
T_bscl JTAG_TCK low time
50
T_bsch JTAG_TCK high time
50
T_bsis
JTAG_TDI, JTAG_TMS setup time
to rising edge of JTAG_TCK
10
T_bsih
JTAG_TDI, JTAG_TMS hold time
from rising edge of JTAG_TCK
10
T_bsoh
JTAG_TDO hold time after falling
edge of JTAG_TCK
1.5
T_bsod
JTAG_TDO clock to output from
falling edge of JTAG_TCK
T_bsr JTAG_TRST_N reset period
30
T_bsrs
JTAG_TMS setup time to rising
edge of JTAG_TRST_N
10
T_bsrh
JTAG_TMS hold time from rising
edge of JTAG_TRST_N
10
Notes:
1.
Tests completed with a TBD pF load to ground on JTAG_TDO.
2.
JTAG_TCK may be stopped indefinitely in either the low or high phase.
Max.
Units Notes
ns
2
ns
2
ns
ns
ns
1
40
ns
1
ns
ns
ns
Datasheet
Document Number: 252479, Revision: 005
March 2005
127