MPC8555VTAPF datasheet(46/88 Pages) FREESCALE

46 / 88 page

MPC8555E PowerQUICC™ III Integrated Communications Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

CPM

Figure 26 shows the SCC/SMC/SPI 1,2external clock.

Figure 26. SCC/SMC/SPI AC Timing External Clock Diagram

Figure 27 shows the SCC/SMC/SPI 1,2 internal clock.

Figure 27. SCC/SMC/SPI AC Timing Internal Clock Diagram

Figure 28 shows TDM input and output signals.

Figure 28. TDM Signal AC Timing Diagram

1 SPI AC timings are internal mode when it is master since SPICLK is an

output, and external mode when it is slave.

2 SPI AC timings refer always to SPICLK.

Serial CLKIN

tNEIXKH

tNEIVKH

tNEKHOX

Input Signals:

(See Note)

Output Signals:

(See Note)

Note:

SCC/SMC/SPI

The clock edge is selectable on SCC and SPI.

BRG_OUT

tNIIXKH

tNIKHOX

Input Signals:

(See Note)

Output Signals:

(See Note)

Note:

tNIIVKH

SCC/SMC/SPI

The clock edge is selectable on SCC and SPI.

Serial CLKIN

tTDKHOX

TDM Input Signals

There are 4 possible TDM timing conditions:

tTDIVKH

tTDIXKH

TDM Output Signals

Note:

Input sampled on the rising edge and output driven on the rising edge (shown).

Input sampled on the rising edge and output driven on the falling edge.

Input sampled on the falling edge and output driven on the falling edge.

Input sampled on the falling edge and output driven on the rising edge.

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