21/36

M50LPW040

Table 21. LPC Interface Clock Characteristics

Note: 1. Devices on the PCI Bus must work with any clock frequency between DC and 33MHz. Below 16MHz devices may be guaranteed

by design rather than tested. Refer to PCI Specification.

Symbol

Parameter

Test Condition

Value

Unit

Min

30

ns

CLK High Time

Min

11

ns

CLK Low Time

Min

11

ns

CLK Slew Rate

peak to peak

Min

1

V/ns

Max

4

V/ns

Figure 9. LPC Interface Clock Waveform

AI03403

tHIGH

tLOW

0.6 VCC

tCYC

0.5 VCC

0.4 VCC

0.3 VCC

0.2 VCC

0.4 VCC, p-to-p

(minimum)