User Manual

EP7309/11/12 User’s Manual - DS508UM4 12-3

PWM Interface

1212

PWM Register Descriptions

Pump Control Register (PMPCON)

Address: 0x8000.0400, Read / Write

Default: 0x00000000

Bit Descriptions:

Drive 0 from Battery Ratio[0:3]:Control of the Drive 0 PWM pump while the

system is battery pow ered. Clearing this field turns pump off

while programming value 1-15 will drive pump with the

correspondingdutyratio.

Drive 0 from AC[4:7]: Control of Drive 0 PWM pump while the system is

powered from an external s ource. Clearing this field turns pump

off while programming value 1-15 will drive pump with the

correspondingdutyratio.

Drive 1 P um p [8:11]:Control of the Drive 1 PW M pump i s no conditional upon

power source. Clearing this field turns pump off while

programming value 1-15 will drive pump with the corresponding

duty ratio.

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

RSVD

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

RSVD Drive 1 Pump Ratio Drive 0 from AC Source Ratio Drive 0 from Battery Ratio

Table 12-2: PWM Pump Drive Settings

Initial State of Drive 0 or Drive 1

During Power on Reset

Sense of Drive 0 or

Drive 1

Polarity of Bias Voltage

Low Active high +ve

High Active low -ve