Pwm register descriptions, Pump control register (pmpcon), Pwm register descriptions -3 – Cirrus Logic EP73xx User Manual
Page 109: Pump control register (pmpcon) -3, Table 12-2: pwm pump drive settings -3
EP7309/11/12 User’s Manual - DS508UM4
12-3
Copyright Cirrus Logic, Inc. 2003
PWM Interface
1212
12
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 powered. Clearing this field turns pump off
while programming value 1-15 will drive pump with the
corresponding duty ratio.
Drive 0 from AC[4:7]: Control of Drive 0 PWM pump while the system is
powered from an external source. Clearing this field turns pump
off while programming value 1-15 will drive pump with the
corresponding duty ratio.
Drive 1 Pump [8:11]:Control of the Drive 1 PWM pump is 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