
MPC8347EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 11
42
Freescale Semiconductor
JTAG
11.2
JTAG AC Timing Specifications
This section describes the AC electrical specifications for the IEEE Std. 1149.1 (JTAG) interface of the
MPC8347EA.
Table 41 provides the JTAG AC timing specifications as defined in
Figure 27 through
Output low voltage
VOL
IOL = 8.0 mA
—
0.5
V
Output low voltage
VOL
IOL = 3.2 mA
—
0.4
V
Table 41. JTAG AC Timing Specifications (Independent of CLKIN)1
At recommended operating conditions (see
Table 2).Parameter
Symbol2
Min
Max
Unit
Notes
JTAG external clock frequency of operation
fJTG
033.3
MHz
—
JTAG external clock cycle time
t JTG
30
—
ns
—
JTAG external clock pulse width measured at 1.4 V
tJTKHKL
15
—
ns
—
JTAG external clock rise and fall times
tJTGR, tJTGF
02
ns
—
TRST assert time
tTRST
25
—
ns
3
Input setup times:
Boundary-scan data
TMS, TDI
tJTDVKH
tJTIVKH
4
—
ns
4
Input hold times:
Boundary-scan data
TMS, TDI
tJTDXKH
tJTIXKH
10
—
ns
4
Valid times:
Boundary-scan data
TDO
tJTKLDV
tJTKLOV
2
11
ns
5
Output hold times:
Boundary-scan data
TDO
tJTKLDX
tJTKLOX
2
—
ns
5
Table 40. JTAG Interface DC Electrical Characteristics (continued)
Parameter
Symbol
Condition
Min
Max
Unit