SX8801IRXXMLTRT View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SX8801IRXXMLTRT' PDF : 135 Pages View PDF
XE8801A – SX8801R
pos.
7-4
5
4
3
2
1
0
RegSysRcTrim1
--
Reserved
RcFreqRange
RcFreqCoarse[3]
RcFreqCoarse[2]
RcFreqCoarse[1]
RcFreqCoarse[0]
rw
reset
r 00
rw 0 resetcold
rw 0 resetcold
rw 0 resetcold
rw 0 resetcold
rw 0 resetcold
rw 0 resetcold
Function
Unused
Reserved
Low/high freq. range (low=0)
RC coarse trim bit 3
RC coarse trim bit 2
RC coarse trim bit 1
RC coarse trim bit 0
Table 7-4: RegSysRCTrim1 register
pos.
7-6
5
4
3
2
1
0
RegSysRcTrim2
--
RcFreqFine[5]
RcFreqFine[4]
RcFreqFine[3]
RcFreqFine[2]
RcFreqFine[1]
RcFreqFine[0]
Rw
reset
r 00
rw 1 resetcold
rw 0 resetcold
rw 0 resetcold
rw 0 resetcold
rw 0 resetcold
rw 0 resetcold
function
Unused
RC fine trim bit 5
RC fine trim bit 4
RC fine trim bit 3
RC fine trim bit 2
RC fine trim bit 1
RC fine trim bit 0
Table 7-5: RegSysRCTrim2 register
RegSysRcTrim1
RegSysRcTrim2
OSCIN
CkRc
RC
External
Clock
0
CkXtal
Xtal
1
0
1
CpuSel
EnXtal and
not(ExtClk or EnExtClk)
High prescaler
0
Low prescaler
1
CkRc
to
CkRc/256
32kHz
to
1Hz
CpuCk
Figure 7-1. Clock block structure
© Semtech 2005
www.semtech.com
7-3
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