TMP91C824
91C824-246
2008-02-20
(6)
DFM (Clock doubler)
Symbol
Name
Address
7 6 5 4 3 2 1 0
ACT1
ACT0
DLUPFG
DLUPTM
R/W
R/W
R
R/W
0 0 0 0
DFM LUP fFPH
00 STOP STOP fOSCH
01 RUN RUN fOSCH
10 RUN STOP fDFM
DFMCR0
DFM
control
register 0
E8H
11 RUN STOP fOSCH
Lockup flag
0: End LUP
1: Do not
Lockup time
0: 2
12/
fOSCH
1: 2
10/
fOSCH
D7 D6 D5 D4 D3 D2 D1 D0
R/W R/W R/W R/W R/W R/W R/W R/W
0 0 0 1 0 0 1 1
DFMCR1
DFM
control
register 1
E9H
DFM correction
Input frequency 4 to 8.25 MHz (at 2.7 to 3.6 V): Write 0BH
Input frequency 2 to 2.5 MHz (at 2.0V
±
10%): Write 1BH