参数资料
型号: MSC8144E
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 数字信号处理
英文描述: 0-BIT, 150 MHz, OTHER DSP, PBGA783
封装: 29 X 29 MM, LEAD FREE, PLASTIC, FCPBGA-783
文件页数: 58/80页
文件大小: 2284K
代理商: MSC8144E
MSC8144E Quad Core Digital Signal Processor Data Sheet, Rev. 0
Freescale Semiconductor
61
2.7.12
SPI Timing
Table 52 provides the SPI input and output AC timing specifications.
Figure 35 provides the AC test load for the SPI.
Figure 35. SPI AC Test Load
Figure 36 through Figure 37 represent the AC timings from Table 52. Note that although the specifications generally reference
the rising edge of the clock, these AC timing diagrams also apply when the falling edge is the active edge.
Figure 36 shows the SPI timings in slave mode (external clock).
Figure 36. SPI AC Timing in Slave Mode (External Clock)
Figure 37 shows the SPI timings in master mode (internal clock).
Table 53. SPI AC Timing Specifications 1
Characteristic
Symbol 2
Min
Max
Unit
SPI outputs valid—Master mode (internal clock) delay
tNIKHOV
6ns
SPI outputs hold—Master mode (internal clock) delay
tNIKHOX
0.5
ns
SPI outputs valid—Slave mode (external clock) delay
tNEKHOV
8ns
SPI outputs hold—Slave mode (external clock) delay
tNEKHOX
2ns
SPI inputs—Master mode (internal clock input setup time
tNIIVKH
4ns
SPI inputs—Master mode (internal clock input hold time
tNIIXKH
0ns
SPI inputs—Slave mode (external clock) input setup time
tNEIVKH
4ns
SPI inputs—Slave mode (external clock) input hold time
tNEIXKH
2ns
Notes:
1. Output specifications are measured from the 50 percent level of the rising edge of CLKIN to the 50 percent level of the signal.
Timings are measured at the pin.
2. The symbols for timing specifications 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, tNIKHOX symbolizes the internal timing
(NI) for the time SPICLK clock reference (K) goes to the high state (H) until outputs (O) are invalid (X).
Output
Z0 = 50 Ω
OVDD/2
RL = 50 Ω
SPICLK (Input)
tNEIXKH
tNEIVKH
tNEKHOX
Input Signals:
SPIMOSI
(See Note)
Output Signals:
SPIMISO
(See Note)
Note: The clock edge is selectable on SPI.
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