MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 1493

• Manufacturer Part Number: MCIMX286CVM4B
• Description: IC MPU I.MX286 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX286CVM4B

• 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: Compliant

Freescale Semiconductor, Inc.
Reset
LRADC_PWRUP
AUTO_RESTART
POSLIMITBUCK
LOWERBIAS
EXTERNAL_
THERMAL_
DISABLE_
DISABLE_
PSWITCH
Bit
ENABLE_
W
R
XTALOK
RSVD1
RESET
RESET
RSVD0
31 28
27 22
15 14
ADJ_
Field
LOWERBIAS
21
20
19
18
17
16
13
15
0
14
0
This field can be used to allow dcdc startup with lower Liion battery voltages. With the default value of 0x0,
the dcdc converter will not startup below 2.83V, and increasing this value will lower the Liion startup voltage.
It is not recommended to set a value higher than 0x6. The value of this field effects the minimum startup
voltage as follows: 0x0=2.83V, 0x1=2.78V, 0x2=2.73V, 0x3=2.68V, 0x4=2.62V, 0x5=2.57V, 0x6=2.52V,
0x7-0xF=2.48V.
Reserved for special uses.
This bit is set by the analog hardware. On powerup, it indicate to software that that the chip had previously
been powered down due to a reset event on the reset pin by an external source. This bit must be cleared
by software. Note this bit is only valid when 32K XTAL is selected as the clock source of RTC, otherwise
the external reset event might not be correctly captured when the reset happens.
This bit is set by the analog hardware. On powerup, it indicate to software that that the chip had previously
been powered down due to overheating. This bit must be cleared by software. This bit is analogous to the
HW_POWER_STS_THERMAL_WARNING bit only in persistent storage. Note this bit is only valid when
32K XTAL is selected as the clock source of RTC, otherwise the thermal reset event might not be correctly
captured when the reset happens.
Reserved for special uses.
Set to one to enable a low voltage on LRADC0 to powerup the chip. This is to support powerup through
open drain pulldowns connected to LRADC0. Ths requires external circuitry and this bit should not be set
unless the correct circuitry is present. Freescale will provide information on the external circuitry, if this
functionality is required.
Set to one to enable the chip to automatically power up approximately 180 ms after powering down.
Disables the pswitch pin startup functionality unless the voltage on the pswitch pin goes above the VDDXTAL
pin voltage by a threshold voltage. Typically, this voltage is created by pulling pswitch up with a current
limiting resistor to a higher voltage, such as the Liion battery voltage.
Reduce bias current of 24mhz crystal.
b00: nominal,
b01: -25%,
b10: -25%,
b11: -50%,
Set to one to disable the circuit that resets the chip if 24-MHz frequency falls below 2 MHz. The circuit
defaults to enabled and will power down the device if the 24-MHz stop oscillating for any reason.
13
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
12
0
HW_RTC_PERSISTENT0 field descriptions
11
0
MSEC_RES
10
0
0
9
Chapter 22 Real-Time Clock Alarm Watchdog Persistent Bits
1
8
Description
0
7
0
6
5
0
4
0
SECS
LCK_
0
3
0
2
0
1
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