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MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 1
Freescale Semiconductor
49
JTAG
21.2
JTAG AC Electrical Characteristics
This section describes the AC electrical specifications for the IEEE Std. 1149.1 (JTAG) interface of the
MPC8309. The following table provides the JTAG AC timing specifications as defined in
Figure 40Input high voltage
VIH
—2.0
OVDD +0.3
V
Input low voltage
VIL
—–0.3
0.8
V
Input current
IIN
0 V
VIN OVDD
—±5
A
Table 54. JTAG AC Timing Specifications (Independent of SYS_CLK_IN)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
11
—
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
15
ns
5
Table 53. JTAG Interface DC Electrical Characteristics (continued)
Characteristic
Symbol
Condition
Min
Max
Unit