DBS9900 User’s Manual
9-2
DBS9900 Time Base Truth Table
82-28993 Revision 01
DBS9900 Time Base Control Bits
CLOCK CONTROL REGISTER (
0x18=4h)
TIME BASE CONTROL MODES
0x14(D5)
014x(D4)
0x14(D[3:2])
0x14(D[1:0])
0x14(D14)
EXTERNAL REFERENCE
EXTCLKA_EN
EXTCLKB_EN
CHA_CLKSEL[1:0]
CHB_CLKSEL[1:0]
REFSEL
MODA off, MODB off
0
0
0h
0h
1
TB => MODA, MODB off
0
1
1h
0h
1
CHA => MODA, MODB off
1
0
2h
0h
1
CHB => MODA, MODB off
0
1
3h
0h
1
MODA off, TB => MODB
0
1
0h
1h
1
TB => MODA, TB => MODB
0
1
1h
1h
1
CHA => MODA, TB => MODB
1
1
2h
1h
1
CHB => MODA, TB => MODB
0
1
3h
1h
1
MODA off, CHA => MODB
1
0
0h
2h
1
TB => MODA, CHA => MODB
1
1
1h
2h
1
CHA => MODA, CHA => MODB
1
0
2h
2h
1
CHB => MODA, CHA => MODB
1
1
3h
2h
1
MODA off, CHB => MODB
0
1
0h
3h
1
TB => MODA, CHB => MODB
0
1
1h
3h
1
CHA => MODA, CHB => MODB
1
1
2h
3h
1
CHB => MODA, CHB => MODB
0
1
3h
3h
1
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