CPM Electrical Characteristics
13.4 Timer AC Electrical Specifications
Table 20 provides the general-purpose timer timings as shown in Figure 46.
Table 20. Timer Timing
All
Frequencies
Num
Characteristic
Unit
Min
Max
61
62
63
64
65
TIN/TGATE rise and fall time
TIN/TGATE low time
10
1
—
—
—
—
25
ns
clk
clk
clk
ns
TIN/TGATE high time
TIN/TGATE cycle time
CLKO low to TOUT valid
2
3
3
CLKO
60
61
63
62
TIN/TGATE
(Input)
61
64
65
TOUT
(Output)
Figure 46. CPM General-Purpose Timers Timing Diagram
13.5 Serial Interface AC Electrical Specifications
Table 21 provides the serial interface (SI) timings as shown in Figure 47 to Figure 51.
Table 21. SI Timing
All Frequencies
Num
Characteristic
Unit
Min
Max
70
71
L1RCLKB, L1TCLKB frequency (DSC = 0) 1, 2
—
SYNCCLK
/2.5
MHz
L1RCLKB, L1TCLKB width low (DSC = 0) 2
P + 10
P + 10
—
—
—
ns
ns
ns
ns
3
71a L1RCLKB, L1TCLKB width high (DSC = 0)
72
73
L1TXDB, L1ST1 and L1ST2, L1RQ, L1CLKO rise/fall time
15.00
—
L1RSYNCB, L1TSYNCB valid to L1CLKB edge (SYNC setup time)
20.00
MPC875/MPC870 Hardware Specifications, Rev. 3.0
50
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
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