MSC8144EC datasheet(60/80 Pages) FREESCALE

60 / 80 page

MSC8144EC Quad Core Digital Signal Processor Data Sheet, Rev. 6

Freescale Semiconductor

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

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.

MSC8144EC Datasheet(PDF) 60 Page - Freescale Semiconductor, Inc

MSC8144EC Datasheet(HTML) 60 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

Datasheet Download

Link URL