MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 2307

• Manufacturer Part Number: MCIMX281AVM4B
• Description: IC MPU I.MX28 1.2 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX281AVM4B

• Core Processor: ARM9
• Core Size: 32-Bit
• Speed: 454MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, MMC, SmartCard, SPI, SSI, UART/USART, USB OTG
• Peripherals: DMA, I²S, LCD, POR, PWM, WDT
• Program Memory Size: 128KB (32K x 32)
• Program Memory Type: Mask ROM
• Ram Size: 32K x 32
• Voltage - Supply (vcc/vdd): 1.25 V ~ 5.25 V
• Data Converters: A/D 17x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 289-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -
• Eeprom Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

38.5.21 LRADC Control Register 4 (HW_LRADC_CTRL4)
LRADC control register 4 specifies the analog mux selector values used for channels 0
through channel 7.
HW_LRADC_CTRL4: 0x140
HW_LRADC_CTRL4_SET: 0x144
HW_LRADC_CTRL4_CLR: 0x148
HW_LRADC_CTRL4_TOG: 0x14C
Freescale Semiconductor, Inc.
Reset
SCALE_FACTOR
SCALED_BATT_
AUTOMATIC
Bit
VOLTAGE
W
RSRVD3
RSRVD2
RSRVD1
R
31 21
19 18
17 16
15 10
Field
9 0
20
15
0
14
0
Reserved
Control the automatic update mode of the BATT_VAL bit field in the HW_POWER_BATTMONITOR register.
0x0
0x1
Reserved
i.MX28 only support Li-ION battery, user need to program the scale factor to 0x2
0x0
0x1
0x2
0x3
Reserved
LRADC Battery Voltage Divided by approximately 4.414. The actual scale factor is (battery voltage) times
29 divided by 128.
13
RSRVD1
0
DISABLE — No automatic update of the scaled value.
ENABLE — Automatically compute the scaled battery voltage each time an LRADC Channel 7 (BATT)
conversion takes place. Before setting this enable bit, user need to program the scale factor to 0x2.
Before setting this enable bit, user need to program the scale factor to 0x2.
Reserved
Reserved
LI_ION — Lithium Ion Battery operation, 29/128.
Reserved
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
HW_LRADC_CONVERSION field descriptions
12
0
11
0
10
0
Chapter 38 Low-Resolution ADC (LRADC) and Touch-Screen Interface
0
9
0
8
Description
1
7
SCALED_BATT_VOLTAGE
0
6
5
0
4
0
0
3
0
2
0
1
2307
0
0