MPC855 datasheet(49/76 Pages) MOTOROLA

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MPC860 Family Hardware Speciﬁcations

Serial Interface AC Electrical Specifications

Figure 11-48. CPM General-Purpose Timers Timing Diagram

11.5 Serial Interface AC Electrical Speciﬁcations

Table 11-17 provides the serial interface timings as shown in Figure 11-49 through

Figure 11-53.

Table 11-17. SI Timing

Num

Characteristic

All Frequencies

Unit

Min

Max

L1RCLK, L1TCLK frequency (DSC = 0) 1, 2

—

SYNCCLK/2.5

MHz

L1RCLK, L1TCLK width low (DSC = 0) 2

P + 10

—

71a

L1RCLK, L1TCLK width high (DSC = 0) 3

P + 10

—

L1TXD, L1ST(1–4), L1RQ, L1CLKO rise/fall time

—

15.00

L1RSYNC, L1TSYNC valid to L1CLK edge (SYNC setup time)

20.00

—

L1CLK edge to L1RSYNC, L1TSYNC, invalid (SYNC hold time)

35.00

—

L1RSYNC, L1TSYNC rise/fall time

—

15.00

L1RXD valid to L1CLK edge (L1RXD setup time)

17.00

—

L1CLK edge to L1RXD invalid (L1RXD hold time)

13.00

—

L1CLK edge to L1ST(1–4) valid 4

10.00

45.00

78A

L1SYNC valid to L1ST(1–4) valid

10.00

45.00

L1CLK edge to L1ST(1–4) invalid

10.00

45.00

L1CLK edge to L1TXD valid

10.00

55.00

80A

L1TSYNC valid to L1TXD valid 4

10.00

55.00

L1CLK edge to L1TXD high impedance

0.00

42.00

L1RCLK, L1TCLK frequency (DSC =1)

—

16.00 or

SYNCCLK/2

MHz

CLKO

TIN/TGATE

(Input)

TOUT

(Output)

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