mpc8343e Freescale Semiconductor, Inc, mpc8343e Datasheet - Page 38

• Manufacturer Part Number: mpc8343e
• Description: Mpc8343e Powerquicc
• Manufacturer: Freescale Semiconductor, Inc

JTAG
Figure 21
Figure 22
38
At recommended operating conditions (see
Output hold times:
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
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.
JTAG external clock to output high impedance:
3. TRST is an asynchronous level sensitive signal. The setup time is for test purposes only.
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
The output timings are measured at the pins. All output timings assume a purely resistive 50 Ω load (see
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 MPC8343E.
provides the JTAG clock input timing diagram.
MPC8343E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 11
External Clock
Table 33. JTAG AC Timing Specifications (Independent of CLKIN)
Parameter
JTAG
Output
JTG
Figure 21. AC Test Load for the JTAG Interface
Figure 22. 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).
VM = Midpoint Voltage (OV DD /2)
TCLK
Z
t
JTG
TCLK
0
symbolizes JTAG timing (JT) with respect to the time data input signals (D)
= 50 Ω
TDO
TDO
.
VM
.
for outputs. For example, t
(first two letters of functional block)(signal)(state)(reference)(state)
Symbol
t
t
t
t
JTKLDX
JTKLOX
JTKLOZ
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
DD
1
Max
symbolizes JTAG device timing
19
—
—
t
9
(continued)
JTG
JTGF
/2
clock reference (K) going
Freescale Semiconductor
Unit
ns
ns
Figure
for inputs
21).
Notes
5, 6
5