參數(shù)資料
型號: MPC8379EVRALGA
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA689
封裝: 31 X 31 MM, 2.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-689
文件頁數(shù): 63/114頁
文件大?。?/td> 1337K
代理商: MPC8379EVRALGA
MPC8379E PowerQUICC II Pro Processor Hardware Specifications, Rev. 2
52
Freescale Semiconductor
JTAG
Figure 32 provides the AC test load for TDO and the boundary-scan outputs of the device.
Figure 32. AC Test Load for the JTAG Interface
Figure 33 provides the JTAG clock input timing diagram.
Figure 33. JTAG Clock Input Timing Diagram
Figure 34 provides the TRST timing diagram.
Figure 34. 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 t
TCLK 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 17).
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 t
TCLK.
5 Non-JTAG signal output timing with respect to t
TCLK.
Table 44. JTAG AC Timing Specifications (Independent of CLKIN) 1 (continued)
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)
TRST
VM = Midpoint Voltage (OVDD/2)
VM
tTRST
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