MCIMX280DVM4B Просмотр технического описания (PDF) - Freescale Semiconductor

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MCIMX280DVM4B

i.MX28 Applications Processors Data Sheet for Consumer Products

Freescale Semiconductor 

Signal

DCDC_BATTERY

XTALI

XTALO

RTC_XTALO

RTC_XTALI

RESETN

DEBUG

TESTMODE

Table 5. Signal Considerations (continued)

Descriptions

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 kohm

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 7 provides the DC absolute maximum operating conditions.

CAUTION

• Stresses beyond those listed under Table 7 may cause permanent

damage to the device.

• Exposure to absolute-maximum-rated conditions for extended periods

may affect device reliability.

• Table 6 gives stress ratings only—functional operation of the device is

not implied beyond the conditions indicated in Table 8.

Table 6. DC Absolute Maximum Ratings

Parameter

Battery Pin

5-Volt Source Pin - transient, t<30ms, duty cycle <0.05%

5 Volt Source Pin - static

PSWITCH1

Symbol

BATT, VDD4P2V

VDD5V

VDD5V

—

Min.

–0.3

–0.3

–0.3

–0.3

Max.

4.242

7.00

6.00

BATT/2

Units

V

V

V

V

i.MX28 Applications Processors Data Sheet for Consumer Products, Rev. 1

Freescale Semiconductor

11

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