MPC875 Freescale Semiconductor, Inc, MPC875 Datasheet - Page 47

• Manufacturer Part Number: MPC875
• Description: Mpc875 Powerquicc Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

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
Table 17
Figure 41
13.2
Table 18
1
Freescale Semiconductor
Num
Num
Applies to high-to-low mode (EDM = 1).
35
36
40
41
42
43
44
45
46
Port C interrupt pulse width low (edge-triggered mode)
Port C interrupt minimum time between active edges
DREQ setup time to clock high
DREQ hold time from clock high
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)
provides the timings for Port C interrupts.
provides the IDMA controller timings as shown in
Port C Interrupt AC Electrical Specifications
IDMA Controller AC Electrical Specifications
shows the Port C interrupt detection timing.
(Input)
Port C
MPC875/MPC870 PowerQUICC™ Hardware Specifications, Rev. 4
Figure 41. Port C Interrupt Detection Timing
1
Characteristic
Characteristic
Table 18. IDMA Controller Timing
Table 17. Port C Interrupt Timing
35
Figure 42
through
36
Figure
TBD
All Frequencies
Min
Min
55
55
—
—
—
—
CPM Electrical Characteristics
7
7
33.34 MHz
45.
Max
Max
12
12
20
15
—
—
—
—
—
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
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