參數(shù)資料
型號: MPC8378E-MDS-PB
廠商: Freescale Semiconductor
文件頁數(shù): 84/128頁
文件大?。?/td> 0K
描述: BOARD PROCESSOR FOR MDS S
標準包裝: 1
類型: MPU
適用于相關產品: MPC8378
所含物品:
MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 8
Freescale Semiconductor
59
This figure provides the AC test load for TDO and the boundary-scan outputs of the device.
Figure 36. AC Test Load for the JTAG Interface
This figure provides the JTAG clock input timing diagram.
Figure 37. JTAG Clock Input Timing Diagram
This figure provides the TRST timing diagram.
Figure 38. TRST Timing Diagram
JTAG external clock to output high impedance:
Boundary-scan data
TDO
tJTKLDZ
tJTKLOZ
2
19
9
ns
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 21). Time-of-flight delays must be added for trace lengths, vias, and connectors in the system.
2. The symbols used for timing specifications herein 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 50. JTAG AC Timing Specifications (Independent of CLKIN) 1 (continued)
Parameter
Symbol2
Min
Max
Unit
Note
Output
Z0 = 50 Ω
OVDD/2
RL = 50 Ω
JTAG
tJTKHKL
tJTGR
External Clock
VM
tJTG
tJTGF
VM = Midpoint Voltage (OVDD/2)
TRST
VM = Midpoint Voltage (OVDD/2)
VM
tTRST
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