參數(shù)資料
型號(hào)： MSC8256TVT800B
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 數(shù)字信號(hào)處理
英文描述： 0-BIT, OTHER DSP, PBGA783
封裝： 29 X 29 MM, LEAD FREE, PLASTIC, FCBGA-783
文件頁數(shù)： 47/68頁
文件大小： 910K
代理商： MSC8256TVT800B
MSC8256 Six-Core Digital Signal Processor Data Sheet, Rev. 3
Freescale Semiconductor
51
2.6.7
Asynchronous Signal Timing
Table 35 lists the asynchronous signal timing specifications.
The following interfaces use the specified asynchronous signals:
GPIO. Signals GPIO[31–0], when used as GPIO signals, that is, when the alternate multiplexed special functions are
not selected.
Note:
When used as a general purpose input (GPI), the input signal should be driven until it is acknowledged by the
MSC8256 device, that is, when the expected input value is read from the GPIO data register.
EE port. Signals EE0, EE1.
Boot function. Signal STOP_BS.
I
2C interface. Signals I2C_SCL and I2C_SDA.
Interrupt inputs. Signals IRQ[15–0] and NMI.
Interrupt outputs. Signals INT_OUT and NMI_OUT (minimum pulse width is 32 ns).
2.6.8
JTAG Signals
Table 38 lists the JTAG timing specifications shown in Figure 29 through Figure 32.
Figure 29 shows the test clock input timing diagram
Table 37. Signal Timing
Characteristics
Symbol
Type
Min
Input
tIN
Asynchronous
One CLKIN cycle
Output
tOUT
Asynchronous
Application dependent
Note:
Input value relevant for EE0, IRQ[15–0], and NMI only.
Table 38. JTAG Timing
Characteristics
Symbol
All frequencies
Unit
Min
Max
TCK cycle time
tTCKX
36.0
—
ns
TCK clock high phase measured at VM = VDDIO/2
tTCKH
15.0
—
ns
Boundary scan input data setup time
tBSVKH
0.0
—
ns
Boundary scan input data hold time
tBSXKH
15.0
—
ns
TCK fall to output data valid
tTCKHOV
—
20.0
ns
TCK fall to output high impedance
tTCKHOZ
—
24.0
ns
TMS, TDI data setup time
tTDIVKH
0.0
—
ns
TMS, TDI data hold time
tTDIXKH
5.0
—
ns
TCK fall to TDO data valid
tTDOHOV
—
10.0
ns
TCK fall to TDO high impedance
tTDOHOZ
—
12.0
ns
TRST assert time
tTRST
100.0
—
ns
Note:
All timings apply to OnCE module data transfers as well as any other transfers via the JTAG port.
Figure 29. Test Clock Input Timing
TCK
(Input)
VM
tTCKX
tTCKH
tTCKR
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