MPC8308CVMADDA FREESCALE [Freescale Semiconductor, Inc], MPC8308CVMADDA Datasheet - Page 54

• Manufacturer Part Number: MPC8308CVMADDA
• Description: MPC8308 PowerQUICC II Pro Processor Hardware Specification
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

JTAG
Figure 40
Figure 41
54
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 used 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.
inputs and t
timing (JT) with respect to the time data input signals (D) reaching the valid state (V) relative to the t
going to the high (H) state or setup time. Also, t
(D) went invalid (X) relative to the t
symbol representation is based on three letters representing the clock of a particular functional. For rise and fall times, the
latter convention is used with the appropriate letter: R (rise) or F (fall).
provides the AC test load for TDO and the boundary-scan outputs.
provides the JTAG clock input timing diagram.
Table 42. JTAG AC Timing Specifications (Independent of SYS_CLK_IN)
(first two letters of functional block)(reference)(state)(signal)(state)
External Clock
Parameter
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 0
JTAG
Output
Figure 40. AC Test Load for the JTAG Interface
JTG
Figure 41. JTAG Clock Input Timing Diagram
Boundary-scan data
Boundary-scan data
Table
VM
clock reference (K) going to the high (H) state. Note that, in general, the clock reference
t
JTKHKL
2).
Z
VM = Midpoint Voltage (NV
0
JTDXKH
TCLK
t
= 50 Ω
JTG
TCLK
TDO
TDO
.
VM
.
symbolizes JTAG timing (JT) with respect to the time data input signals
Symbol
t
t
t
t
JTKLDX
JTKLOZ
JTKLOX
JTKLDZ
VM
(first two letters of functional block)(signal)(state) (reference)(state)
for outputs. For example, t
2
DD
R
/2)
L
= 50 Ω
Min
TCLK
t
2
2
2
2
JTGR
to the midpoint of the signal in question.
NV
JTDVKH
Max
DD
19
—
—
t
9
JTGF
/2
1
(continued)
symbolizes JTAG device
Freescale Semiconductor
JTG
clock reference (K)
Unit
ns
ns
Figure
40).
Notes
5, 6
5
for