SC900841JVK Freescale Semiconductor, SC900841JVK Datasheet - Page 60

• Manufacturer Part Number: SC900841JVK
• Description: IC POWER MGT 338-MAPBGA
• Manufacturer: Freescale Semiconductor

Specifications of SC900841JVK

• Applications: PC's, PDA's
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 338-TBGA
• Input Voltage: 2.8 V to 4.4 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Table 25. RTC Control Registers Structure and Bit Description
OVERVIEW
of the 900841 PMIC, what causes the 900841 to be in each
of them, and how the SCU is involved.
as long as a valid battery or a valid charger input (a USB
source or a wall plug) exists. If any of the previous two power
sources are present, the 900841 powers up the SCU part of
Platform controller hub, with a minimum set of power
supplies, and the SCU takes over the system.
and power states of the 900841 solution, and essentially
limits the power states to 3 different states, that is discussed
at length later:
60
900841
FUNCTIONAL DEVICE OPERATION
POWER STATES AND CONTROL
M32KCLK
The following section discusses the different Power States
In Ultra-mobile platforms, the SCU is required to be alive
The previous paragraph simplifies the operation modes
Reserved
Reserved
V
BOS
0.9V
Keep Alive
Bandgap
V
PVINCHG
7:1
7
0
RC/XTAL
CLOCK
Fixed to 0
32 kHz clock output mask
x0 = 32 kHz clock output enabled
x1 = 32 kHz clock output masked (disabled)
Fixed to 0000000
V
1.2V
BAT
VCORERTC
V
COINCELL
Figure 17. 900841 Internal Power Tree Block Diagram
1.2V
CLKOUT (ADDR 0x21 - R/W - Default Value: 0x00)
Keep Alive
Registers
POWER STATES AND CONTROL
STATE
RTC
VCOREDIG > 1.2V
Closed when
ACTIVE
STATE
EN
INTERNAL SUPPLIES POWER TREE
system and how it interacts with Platform controller hub to
support the needs of the platform, first examine how the
900841 powers itself up and its internal power tree.
tree.
1. No Power: Depleted or no coin cell battery, main
2. RTC State: 900841 has enough power to support the
3. Active State: 900841 has enough power to supply the
Before going into the Power State of 900841 solution as a
Figure 17
Digital Supply
battery, and charger input
RTC operation and keep registers alive, but not to
power the SCU
SCU
VCOREDIG
1.5V
UVDET
EN
is a block diagram of the 900841 internal power
EN
Reference Supply
VCOREREF
Analog Integrated Circuit Device Data
V
1.2V
PWR
Freescale Semiconductor
Analog Supply
VCORE
2.775V
EN