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Electrical Characteristics
MCF5272 ColdFire Integrated Microprocessor User’s Manual, Rev. 3
23-30
Freescale Semiconductor
23.12 IEEE 1149.1 (JTAG) AC Timing Specifications
Figure 23-23. IEEE 1149.1 (JTAG) Timing
Table 23-23. IEEE 1149.1 (JTAG) AC Timing Specifications
Name
Characteristic
0–66 MHz
Unit
Min
Max
—
TCK frequency of operation
0
10
MHz
J1
TCK cycle time
100
—
nS
J2a
TCK clock pulse high width measured at 1.5 V
40
—
nS
J2b
TCK clock pulse low width measured at 1.5 V
40
—
nS
J3a
TCK fall time (from Vh = 2.4 V to Vl = 0.5 V)
—
5
nS
J3b
TCK rise time (from Vl = 0.5 V to Vh = 2.4 V)
—
5
nS
J4
TDI, TMS to TCK rising (setup)
10
—
nS
J5
TCK rising edge to TDI, TMS invalid (hold)
15
—
nS
J6
Boundary scan data valid to TCK rising edge (setup)
10
—
nS
J7
Boundary scan data invalid to TCK rising edge (hold)
15
—
nS
J8
TRST pulse-width (asynchronous to clock edges)
15
—
nS
J9
TCK falling edge to TDO valid (signal from driven or three-state)
—
30
nS
J10
TCK falling edge to TDO high impedance
—
30
nS
J11
TCK falling edge to boundary scan data valid (signal from driven or three-state)
—
35
nS
J12
TCK falling edge to boundary scan data high impedance
—
35
nS
TCK
J1
J3b
J3a
Vh
Vl
J2a
J2b
J4
J5
J6
J7
Boundary
J9
J10
TRST
TDO
J8
J11
J12
TDI, TMS
Scan Data
Inputs
Boundary
Scan Data
Outputs