Maxim Integrated MAXQ Family - Manual (Page 145)

14-4
MAXQ Family User’s Guide
VALID FOR ONE 256Hz
CYCLE EVERY 16SEC.
THEN CLEARED TO 0.
5-BIT PHASE
ACCUMULATOR
256Hz
MUX
256Hz
512Hz
CARRY-OUT
TSGN
16-SECOND CLOCK
TRM4:0
Figure 14-2. RTC Digital-Trim Facility Block Diagram
16SEC CLOCK
256Hz CLOCK
1
1
512Hz CLOCK
256Hz MUX SELECT
NEGATIVE CAL (S = 1)
256Hz OUTPUT
ACCUMULATOR
CARRY-OUT (CO)
POSITIVE CAL (S = 0)
256Hz OUTPUT
POSITIVE CAL (S = 0)
128Hz OUTPUT
NEGATIVE CAL (S = 1)
128Hz OUTPUT
Figure 14-3. Digital Trim Pulse Calibration Diagram
Maxim Integrated