Rev. 1.0, 02/00, page 657 of 1141
R*/W
Note:
When DVREF1 and DVREF0 are read, values in the down counter (2 bits) are readout.
φ
s = fosc/2
φ
s
φ
s /2
EXCAP
REF30P
XTCR
W
W
XCS
XTCR
W
AT/MU
ASM
REC/PB
XTCR
W
TRK/X
S
R
Q
S
R
Q
Internal bus
Internal bus
DVREF1, 0
CAPRF
EXC/REF
W
W
XTCR
XTCR
Down counter
Edge
selection
,
(2 bits)
Counter
(10bit)
CAPREF30
REF30X
W
X-value data
register
XDR
(12 bits)
TRK value data
register
TRDR
(12 bits)
Down counter
(12 bits)
(12 bits)
Down counter
Figure 26.37 Block Diagram of X-Value Adjustment Circuit