MPC875CVR133 datasheet(47/84 Pages) FREESCALE

47 / 84 page

MPC875/MPC870 PowerQUICC™ Hardware Specifications, Rev. 4

Freescale Semiconductor

CPM Electrical Characteristics

13 CPM Electrical Characteristics

This section provides the AC and DC electrical specifications for the communications processor module

(CPM) of the MPC875/MPC870.

13.1

Port C Interrupt AC Electrical Specifications

Table 17 provides the timings for Port C interrupts.

Figure 41 shows the Port C interrupt detection timing.

Figure 41. Port C Interrupt Detection Timing

13.2

IDMA Controller AC Electrical Specifications

Table 18 provides the IDMA controller timings as shown in Figure 42 through Figure 45.

Table 17. Port C Interrupt Timing

Num

Characteristic

33.34 MHz

Unit

Min

Max

Port C interrupt pulse width low (edge-triggered mode)

—

Port C interrupt minimum time between active edges

—

Table 18. IDMA Controller Timing

Num

Characteristic

All Frequencies

Unit

Min

Max

DREQ setup time to clock high

—

DREQ hold time from clock high1

1 Applies to high-to-low mode (EDM = 1).

TBD

—

SDACK assertion delay from clock high

—

SDACK negation delay from clock low

—

SDACK negation delay from TA low

—

SDACK negation delay from clock high

—

TA assertion to rising edge of the clock setup time (applies to external TA)7

—

Port C

(Input)

MPC875CVR133 Datasheet(PDF) 47 Page - Freescale Semiconductor, Inc

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