DBS9900 User’s Manual
DBS9900 Time Base Truth Tables
9-1
82-28993 Revision 01
9 Time Base Truth Table:
The following table shows the typical Clock modes that can be anticipated to be used when
setting up the Time Base and Clock routing.
Table 1 – Time Base Truth table
DBS9900 Time Base Control Bits
CLOCK CONTROL REGISTER (
0x18=4h)
TIME BASE CONTROL REGISTER (
0x18=6h)
TIME BASE CONTROL MODES
0x14(D5)
014x(D4)
0x14(D[3:2])
0x14(D[1:0])
0x14(D14) 0x14(D13) 0x14(D12)
014x(D[9:8])
INTERNAL REFERENCE
EXTCLKA_EN
EXTCLKB_EN
CHA_CLKSEL[1:0] CHB_CLKSEL[1:0]
REFSEL
PLL_EN
INTREF
FREQSEL[1:0]
MODA off, MODB off
0
0
0h
0h
0
0
0
0h
TB => MODA, MODB off
0
0
1h
0h
0
1
1
1h, 2h, 3h
CHA => MODA, MODB off
1
0
2h
0h
0
0
0
0h
CHB => MODA, MODB off
0
1
3h
0h
0
0
0
0h
MODA off, TB => MODB
0
0
0h
1h
0
1
1
1h, 2h, 3h
TB => MODA, TB => MODB
0
0
1h
1h
0
1
1
1h, 2h, 3h
CHA => MODA, TB => MODB
1
0
2h
1h
0
1
1
1h, 2h, 3h
CHB => MODA, TB => MODB
0
1
3h
1h
0
1
1
1h, 2h, 3h
MODA off, CHA => MODB
1
0
0h
2h
0
0
0
0h
TB => MODA, CHA => MODB
1
0
1h
2h
0
1
1
1h, 2h, 3h
CHA => MODA, CHA => MODB
1
0
2h
2h
0
0
0
0h
CHB => MODA, CHA => MODB
1
1
3h
2h
0
0
0
0h
MODA off, CHB => MODB
0
1
0h
3h
0
0
0
0h
TB => MODA, CHB => MODB
0
1
1h
3h
0
1
1
1h, 2h, 3h
CHA => MODA, CHB => MODB
1
1
2h
3h
0
0
0
0h
CHB => MODA, CHB => MODB
0
1
3h
3h
0
0
0
0h
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