參數(shù)資料
型號(hào)： MPC8544VTARJ
廠商： FREESCALE SEMICONDUCTOR INC
元件分類(lèi)： 微控制器/微處理器
英文描述： 32-BIT, 533 MHz, MICROPROCESSOR, PBGA783
封裝： 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, FC-PBGA-783
文件頁(yè)數(shù)： 68/112頁(yè)
文件大?。?/td> 1294K
代理商： MPC8544VTARJ
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 0
Freescale Semiconductor
59
JTAG
Figure 34 provides the AC test load for TDO and the boundary-scan outputs.
Figure 34. AC Test Load for the JTAG Interface
Figure 35 provides the JTAG clock input timing diagram.
Figure 35. JTAG Clock Input Timing Diagram
Output hold times:
Boundary-scan data
TDO
tJTKLDX
tJTKLOX
4
—
ns
5
JTAG external clock to output high impedance:
Boundary-scan data
TDO
tJTKLDZ
tJTKLOZ
3
19
9
ns
5
Notes:
1. All outputs are measured from the midpoint voltage of the falling/rising edge of tTCLK to the midpoint of the signal in question.
The output timings are measured at the pins. All output timings assume a purely resistive 50-
Ω load (see Figure 34).
Time-of-flight delays must be added for trace lengths, vias, and connectors in the system.
2. The symbols used for timing specifications follow the pattern of t(first two letters of functional block)(signal)(state)(reference)(state) for
inputs and t(first two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tJTDVKH symbolizes JTAG device
timing (JT) with respect to the time data input signals (D) reaching the valid state (V) relative to the tJTG clock reference (K)
going to the high (H) state or setup time. Also, tJTDXKH symbolizes JTAG timing (JT) with respect to the time data input signals
(D) went invalid (X) relative to the tJTG clock reference (K) going to the high (H) state. Note that, in general, the clock reference
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).
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 tTCLK.
5. Non-JTAG signal output timing with respect to tTCLK.
Table 51. JTAG AC Timing Specifications (Independent of SYSCLK)1 (continued)
At recommended operating conditions (see Table 3).
Parameter
Symbol2
Min
Max
Unit
Notes
Output
Z0 = 50 Ω
OVDD/2
RL = 50 Ω
JTAG
tJTKHKL
tJTGR
External Clock
VM
tJTG
tJTGF
VM = Midpoint Voltage (OVDD/2)
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