MPC8248 Freescale Semiconductor, Inc, MPC8248 Datasheet - Page 23

• Manufacturer Part Number: MPC8248
• Description: Mpc8248 Powerquicc Ii Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

6.3
Table 14
Freescale Semiconductor
JTAG external clock frequency of operation
JTAG external clock cycle time
JTAG external clock pulse width measured at 1.4V
JTAG external clock rise and fall times
TRST assert time
Input setup times
Input hold times
Output valid times
Output hold times
lists the JTAG timings.
JTAG Timings
The UPM machine outputs change on the internal tick determined by the
memory controller programming; the AC specifications are relative to the
internal tick. Note that SDRAM and GPCM machine outputs change on
CLKin’s rising edge.
MPC8272 PowerQUICC II™ Family Hardware Specifications, Rev. 1.5
Parameter
Boundary-scan data
Boundary-scan data
Boundary-scan data
Boundary-scan data
Table 14. JTAG Timings
TMS, TDI
TMS, TDI
TDO
TDO
NOTE
t
Symbol
JTGR
t
t
t
t
t
t
t
t
t
JTDVKH
JTDXKH
JTKHKL
JTKLDV
JTKLOV
JTKLDX
JTKLOX
JTIVKH
JTIXKH
t
t
f
t
TRST
JTGF
JTG
JTG
and
2
1
Min
30
15
25
10
10
—
—
0
0
4
4
1
1
Max
33.3
10
10
—
—
—
—
—
—
—
—
—
5
AC Electrical Characteristics
MHz
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Notes
3
4
4
4
4
5
5
5
5
6
,
,
,
,
,
,
.
,
,
6
7
7
7
7
7
7
7
7
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