MCIMX283DVM4B(2012) 데이터 시트보기 (PDF) - Freescale Semiconductor

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MCIMX283DVM4B
(Rev.:2012)

i.MX28 Applications Processors Data Sheet for Consumer Products

Freescale Semiconductor 

Electrical Characteristics

2.1 Special Signal Considerations

Special signal considerations are listed in Table 5. The package contact assignment is found in Section 4,

“Package Information and Contact Assignments.” Signal descriptions are provided in the reference

manual.

Table 5. Signal Considerations

Signal

PSWITCH

VDDXTAL

BATTERY

DCDC_BATTERY

XTALI

XTALO

RTC_XTALO

RTC_XTALI

RESETN

DEBUG

TESTMODE

Descriptions

The pin is used for chip power on or recovery. VDDIO can be applied to PSWITCH through a 10 kΩ

resistor. This is necessary in order to enter the chip’s firmware recovery. The on-chip circuitry

prevents the actual voltage on the pin from exceeding acceptable levels.

This pin is an output of i.MX28. Should be coupled to ground with a 0.1 uF capacitor. User should

not supply external power to this pin.

This pin should be connected to the battery with minimal resistance. It provides charging current to

the battery.

See the “Power Supply” section of the reference manual for details.

This pin is an input of i.MX28 that provides supply to the DCDC converter. It should be connected

to the battery with minimal resistance. See the “Power Supply” section of the reference manual for

details.

These analog pins are connected to an external 24 MHz crystal circuit. This crystal provides the

clock source for on-chip PLLs.

These analog pins are connected to an external 32.768/32.0 kHz crystal circuit. This crystal

provides clock source to the on-chip real-time counter circuits.

This pin resets the chip if it is low. This pin is pulled up to VDDIO33 with an internal 10 kΩ resistor.

No external pull up resistors are needed.

This pin is used for JTAG interface.

DEBUG=0: JTAG interface works for boundary scan.

DEBUG=1: JTAG interface works for ARM debugging.

For Freescale factory use only. Must be externally connected to GND for normal operation.

3 Electrical Characteristics

This section provides the device-level and module-level electrical characteristics for the i.MX28.

3.1 i.MX28 Device-Level Conditions

This section provides the device-level electrical characteristics for the IC.

3.1.1 DC Absolute Maximum Ratings

Table 6 provides the DC absolute maximum operating conditions.

CAUTION

• Stresses beyond those listed under Table 6 may cause permanent

damage to the device.

i.MX28 Applications Processors for Consumer Products, Rev. 3

Freescale Semiconductor

11

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