FS8108

Page 7

Jan 2003

ignored, the next 13 data bits are loaded to the 13-bit R-counter latch and the remaining 3

LSBs are used to control testing modes and should be set as follows for normal operation:

R14 = high, R15 = low, R16 = low. To disable LD output (i.e. set LD low), R14 should be

set low.

Serial input data timing waveforms are shown in Fig. 2.

Fig. 1 – Serial input data format

Fig. 2 – Serial input data timing waveforms

18-bit data for N-counter

13-bit data for R-counter

ignored

t

SU1

t

SU2

t

HOLD

DATA

CLK

LE

DATA

CLK

LE

23

4567

89 10 11 12 13 14 15 16 17

1

18 19