900844 Datasheet, PDF (83/118 Pages) Freescale Semiconductor, Inc – Integrated Power Management IC for Ultra-mobile and Embedded Applications

FUNCTIONAL DEVICE OPERATION
POWER SUPPLIES
Table 46. Power Switches Control Registers Structure and Bits Description
Name
Bits
Description
VPANEL33CNT (ADDR 0x4F - R/W - Default Value: 0x24)
CTLVPANEL33 2:0 VPNL33 State Control
x0 = Reserved
x1 = Reserved
x2 = Reserved
x3 = Reserved
x4 = OFF
x5 = Low Power
x6 = Active
x7 = Active
AOACCTLVPANEL33 5:3 VPNL33 State Control during AOAC Exit (when the Exit pin is EXITSTBY pin is asserted). These bits will be
initialized by the system SPI controller after power up.
X0 = Do not copy
x1 = Do not copy
x2 = Do not copy
x3 = Do not copy
x4 = OFF
x5 = Low Power
x6 = Active
x7 = Active
Reserved
7:6 ^Reserved
POWER SUPPLY REGISTER MASK
Mask writes to the power supply registers, in order to avoid the need for the system controller to do read-modify-write cycles.
The mask register is shown in Table 47.
Table 47. Mask Register
Register name
ADDR
R/W
D7
D6
D5
D4
D3
D2
D1
D0
initial
PWRMASK
0x34
R/W
M7
M6
M5
M4
M3
M2
M1
M0
0x00
Figure 48 shows an example of the operation of the PWRMASK register.
D7
D6
D5
D4
D3
D2
D1
D0
Power Supply Register Before Write
1
0
1
0
1
0
1
0
PWRMASK Register Settings
1
1
1
1
0
0
0
0
Example SPI Write to Power Supply
1
1
1
1
1
1
1
1
Power Supply Register After Write
1
0
1
0
1
1
1
1
Figure 48. PWRMASK Register Implementation Example
POWER SUPPLY PROGRAMMABLE RAMP RATE
Turn on time of all buck regulators can be programmed through the SPI, reference Table 48
Table 48. Ramp Rate Control Registers (Freescale Defined)
Name
Bits
Description
VCCTONT
VNNTONT
FSLTONTCNTL1 (ADDR 0x1C8 - R/W - Default Value: 0xAA)
1:0 ^{Turn On Time Settings for VCC Regulator}
x0 = 180 μs
x1 = 90 μs
x2 = 45 μs
x3 = 22 μs
3:2 ^{Turn On Time Settings for VNN Regulator}
x0 = 180 μs
x1 = 90 μs
x2 = 45 μs
x3 = 22 μs
Analog Integrated Circuit Device Data
Freescale Semiconductor
900844
83