Datasheet
TAS5548
www.ti.com
SLES270 –NOVEMBER 2012
11.14 Special Low Z and Mid Z Ramp/Stop Period (0x24)
This is also the delay period for delayed start/stop with legacy LowZ sequences. If register 0x25 is
programmed for special LowZ sequence, the time above is the PWM ramp up period. If it is programmed
for MidZ, the time above is the PWM stop period.
D7 D6 D5 D4 D3 D2 D1 D0 FUNCTION
– – – 0 0 – – – No Ramp/Stop period
– – – 0 1 0 0 0 14.9 ms Ramp/Stop period
– – – 0 1 0 0 1 22.35 ms Ramp/Stop period
– – – 0 1 0 1 0 29.80 ms Ramp/Stop period
– – – 0 1 0 1 1 38.74 ms Ramp/Stop period
– – – 0 1 1 0 0 52.15 ms Ramp/Stop period
– – – 0 1 1 0 1 68.54 ms Ramp/Stop period
– – – 0 1 1 1 0 92.38 ms Ramp/Stop period
– – – 0 1 1 1 1 123.67 ms Ramp/Stop period
– – – 1 0 0 0 0 149 ms Ramp/Stop period
– – – 1 0 0 0 1 223.5 ms Ramp/Stop period
– – – 1 0 0 1 0 298 ms Ramp/Stop period
– – – 1 0 .. .. .. …
– – – 1 0 1 1 1 1236.7 ms Ramp/Stop period
– – – 1 1 0 0 0 1490 ms Ramp/Stop period
– – – 1 1 0 0 1 2235 ms Ramp/Stop period
– – – 1 1 0 1 0 2980 ms Ramp/Stop period
– – – 1 1 .. .. .. …
– – – 1 1 1 1 1 12367 ms Ramp/Stop period
11.15 PWM and EMO Control Register (0x25)
Table 11-16. PWM Config, Energy Manager Reporting Register
D7 D6 D5 D4 D3 D2 D1 D0 FUNCTION
0 0 – – – – – – Use Legacy LowZ sequence for PWM start
1 0 – – – – – – Use special LowZ sequence for PWM start
1 1 – – – – – – Use MidZ sequence for external charge
0 – – – – – Ternary modulation disable
1 – – – – – Ternary modulation enable
0 – – – – Ternary High bias disable
1 – – – – Ternary High bias enable
0 – – – Energy Manager LO threshold reporting disable ← default
1 – – – Energy Manager LO threshold reporting enable
– – – – – 0 0 0 Reserved ← Default
11.16 Individual Channel Shutdown (0x27)
Table 11-17. Individual Channel Shutdown Register
D7 D6 D5 D4 D3 D2 D1 D0 FUNCTION
1 – – – – – – – Keep channel 8 in shutdown
0 – – – – – – – Bring Channel 8 out of shutdown
– 1 – – – – – – Keep channel 7 in shutdown
– 0 – – – – – – Bring Channel 7 out of shutdown
– – 1 – – – – – Keep channel 6 in shutdown
Copyright © 2012, Texas Instruments Incorporated Serial-Control Interface Register Definitions 85
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