MPC8347 FREESCALE [Freescale Semiconductor, Inc], MPC8347 Datasheet - Page 47

• Manufacturer Part Number: MPC8347
• Description: Integrated Host Processor Hardware Specifications
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Figure 25
Figure 26
Freescale Semiconductor
At recommended operating conditions (see
Output hold times:
JTAG external clock to output high impedance:
Notes:
1. All outputs are measured from the midpoint voltage of the falling/rising edge of t
2. The symbols for timing specifications follow the pattern of t
3. TRST is an asynchronous level sensitive signal. The setup time is for test purposes only.
4. Non-JTAG signal input timing with respect to t
5. Non-JTAG signal output timing with respect to t
6. Guaranteed by design and characterization.
The output timings are measured at the pins. All output timings assume a purely resistive 50 Ω load (see
Time-of-flight delays must be added for trace lengths, vias, and connectors in the system.
and t
(JT) with respect to the time data input signals (D) reaching the valid state (V) relative to the t
to the high (H) state or setup time. Also, t
went invalid (X) relative to the t
based on three letters representing the clock of a particular function. For rise and fall times, the latter convention is used with
the appropriate letter: R (rise) or F (fall).
(first two letters of functional block)(reference)(state)(signal)(state)
provides the AC test load for TDO and the boundary-scan outputs of the MPC8347EA.
provides the JTAG clock input timing diagram.
MPC8347EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 3
Table 40. JTAG AC Timing Specifications (Independent of CLKIN)
External Clock
Parameter
JTAG
Output
JTG
Figure 25. AC Test Load for the JTAG Interface
Figure 26. JTAG Clock Input Timing Diagram
Boundary-scan data
Boundary-scan data
clock reference (K) going to the high (H) state. In general, the clock reference symbol is
Table
VM
t
JTKHKL
JTDXKH
2).
Z
VM = Midpoint Voltage (OV DD /2)
0
TCLK
t
= 50 Ω
JTG
TCLK
symbolizes JTAG timing (JT) with respect to the time data input signals (D)
TDO
TDO
.
VM
.
for outputs. For example, t
(first two letters of functional block)(signal)(state) (reference)(state)
Symbol
t
t
t
t
JTKLDX
JTKLOZ
JTKLOX
JTKLDZ
VM
2
R
L
= 50 Ω
Min
TCLK
t
2
2
2
2
JTGR
to the midpoint of the signal in question.
JTDVKH
OV
Max
DD
1
symbolizes JTAG device timing
19
—
—
t
9
JTG
JTGF
(continued)
/2
clock reference (K) going
Unit
ns
ns
Figure
25).
for inputs
Notes
5, 6
5
JTAG
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