MPC8309EC datasheet(48/82 Pages) FREESCALE

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MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0

Freescale Semiconductor

SPI

20.2

SPI AC Timing Specifications

Table 52 and provide the SPI input and output AC timing specifications.

Figure 36 provides the AC test load for the SPI.

Figure 36. SPI AC Test Load

Figure 37 and Figure 38 represent the AC timing 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.

Table 51. SPI DC Electrical Characteristics

Characteristic

Symbol

Condition

Min

Max

Unit

Output high voltage

VOH

IOH = –6.0 mA

2.4

—

Output low voltage

VOL

IOL = 6.0 mA

—

0.5

Output low voltage

VOL

IOL = 3.2 mA

—

0.4

Input high voltage

VIH

—

2.0

OVDD +0.3

Input low voltage

VIL

—–0.3

0.8

Input current

IIN

0 V

 V

IN  OVDD

—

±5

A

Table 52. SPI AC Timing Specifications1

Characteristic

Symbol2

Min

Max

Unit

SPI outputs—Master mode (internal clock) delay

tNIKHOV

0.5

SPI outputs—Slave mode (external clock) delay

tNEKHOV

SPI inputs—Master mode (internal clock) input setup time

tNIIVKH

6—

SPI inputs—Master mode (internal clock) input hold time

tNIIXKH

0—

SPI inputs—Slave mode (external clock) input setup time

tNEIVKH

4—

SPI inputs—Slave mode (external clock) input hold time

tNEIXKH

2—

Notes:

1. Output specifications are measured from the 50% level of the rising edge of SPICLK to the 50% level of the signal. Timings

are measured at the pin.

2. The symbols used 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, tNIKHOV symbolizes the NMSI

outputs internal timing (NI) for the time tSPI memory clock reference (K) goes from the high state (H) until outputs (O) are

valid (V).

3. All units of output delay must be enabled for 8309_output_port spimosi_lpgl0(SPI Master Mode)

4. delay units must not be enabled for Slave Mode.

Output

Z0 = 50 

OVDD/2

RL = 50 

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