Rev. 1.0, 02/00, page 568 of 1141
φ
s/2
φ
s/4
W
W
CREF
DVCFG2
PB(ASM)
↓
REC
Match
Clear
Counter clear
Toggle
Edge
detection
CRD
W
RCS
Reference period register 2 (16 bits)
Reference period buffer 2 (16 bits)
Comparator (16 bits)
Counter (16 bits)
Internal bus
S
R
Q
Dummy read
φ
s = fosc/2
↑
Figure 26.7 Block Diagram of CREF Signal Generator
26.3.3
Register Configuration
Table 26.4 shows the register configuration of the reference signal generators.
Table 26.4
Register Configuration
Name
Abbrev.
R/W
Size
Initial Value
Address
Reference period mode
register
RFM
W
Byte
H'00
H'D096
Reference period register 1
RFD
W
Word
H'FFFF
H'D090
Reference period register 2
CRF
W
Word
H'FFFF
H'D092
REF30 counter register
RFC
R/W
Word
H'0000
H'D094
Reference period mode
register 2
RFM2
R/W
Byte
H'FE
H'D097