參數(shù)資料
型號: MPC8240EC
廠商: Motorola, Inc.
英文描述: Integrated Processor Hardware Specifications
中文描述: 綜合處理器硬件規(guī)格
文件頁數(shù): 25/52頁
文件大?。?/td> 1027K
代理商: MPC8240EC
MOTOROLA
MPC8240 Integrated Processor Hardware Specifications
For More Information On This Product,
Go to: www.freescale.com
25
Electrical and Thermal Characteristics
1.4.2.7
IEEE 1149.1 (JTAG) AC Timing Specifications
Table 15 provides the JTAG AC timing specifications for the MPC8240 while in the JTAG operating mode.
Figure 19 shows the JTAG clock input timing diagram.
Figure 19. JTAG Clock Input Timing Diagram
Table 15. JTAG AC Timing Specification (Independent of PCI_SYNC_IN)
At recommended operating conditions (see Table 2) with LV
DD
= 3.3 V ± 0.3 V
Num
Characteristic
4
Min
Max
Unit
Notes
TCK frequency of operation
0
25
MHz
1
TCK cycle time
40
ns
2
TCK clock pulse width measured at 1.5 V
20
ns
3
TCK rise and fall times
0
3
ns
4
TRST setup time to TCK falling edge
10
ns
1
5
TRST assert time
10
ns
6
Input data setup time
5
ns
2
7
Input data hold time
15
ns
2
8
TCK to output data valid
0
30
ns
3
9
TCK to output high impedance
0
30
ns
3
10
TMS, TDI data setup time
5
ns
11
TMS, TDI data hold time
15
ns
12
TCK to TDO data valid
0
15
ns
13
TCK to TDO high impedance
0
15
ns
Notes:
1. TRST is an asynchronous signal. The setup time is for test purposes only.
2. Non-test (other than TDI and TMS) signal input timing with respect to TCK.
3. Non-test (other than TDO) signal output timing with respect to TCK.
4. Timings are independent of the system clock (PCI_SYNC_IN).
TCK
2
2
1
VM
VM
VM
3
3
VM = Midpoint Voltage
F
Freescale Semiconductor, Inc.
n
.
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