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MC92603 Quad Gigabit Ethernet Transceiver Reference Manual
MOTOROLA
AC Electrical Characteristics
7.3.6
JTAG Test Port Timing
This section describes the AC electrical specifications for the IEEE Std. 1149.1 (JTAG)
interface of the MC92603. Figure 7-11 provides the JTAG I/O Timing Diagram.
Figure 7-11. JTAG I/O Timing Diagram
Table 7-15 provides the JTAG I/O timing specifications.
Table 7-15. JTAG I/O Timing Specifications
Symbol
Characteristic
Min
Max
Unit
T
1
Output propagation time after falling edge of TCK
1
1
10 pF output load
1.0
8.0
ns
T
2
Setup time to rising edge of TCK
1.0
—
ns
T
3
Hold time to rising edge of TCK
0.5
—
ns
f
TCK
TCK frequency
—
20
MHz
T
D
TCK duty cycle
35
65
%
t
r
, t
f
TCK input rise/fall time
—
2
ns
T
4
TRST assert pulse width
25
—
ns
TCK
TDO
TDI
TMS
T
2
T
3
T
1
1/f
TCK
TRST
T
4
Summary of Contents for MC92603
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