参数资料
型号: MPC8555CPXAJD
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 533 MHz, RISC PROCESSOR, PBGA783
封装: 29 X 29 MM, 3.75 MM HEIGHT, 1 MM PITCH, FLIP CHIP, PLASTIC, BGA-783
文件页数: 44/88页
文件大小: 772K
代理商: MPC8555CPXAJD
MPC8555E PowerQUICC III Integrated Communications Processor Hardware Specification, Rev. 3.1
Freescale Semiconductor
49
JTAG
Figure 31 provides the AC test load for TDO and the boundary-scan outputs of the MPC8555E.
Figure 31. AC Test Load for the JTAG Interface
JTAG external clock to output high impedance:
Boundary-scan data
TDO
tJTKLDZ
tJTKLOZ
3
19
9
ns
5, 6
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-
load (see
Figure 31). 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.
6. Guaranteed by design.
Table 38. JTAG AC Timing Specifications (Independent of SYSCLK) 1 (continued)
At recommended operating conditions (see Table 2).
Parameter
Symbol 2
Min
Max
Unit
Notes
Output
Z0 = 50
OVDD/2
RL = 50
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