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IMX51A Datasheet(PDF) 21 Page - Freescale Semiconductor, Inc

Part # IMX51A
Description  i.MX51A Automotive and Infotainment Applications Processors
PDF  172 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

IMX51A Datasheet(HTML) 21 Page - Freescale Semiconductor, Inc

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Electrical Characteristics
i.MX51A Automotive and Infotainment Applications Processors, Rev. 2
Freescale Semiconductor
21
Preliminary—Subject to Change Without Notice
4.1.2
USB PHY Current Consumption
Table 17 shows the USB PHY current consumption.
4.2
Supply Power-Up/Power-Down Requirements and Restrictions
The system design must comply with the power-up and power-down sequence guidelines as described in
this section to guarantee reliable operation of the device. Any deviation from these sequences may result
in the following situations:
•
Excessive current during power-up phase
•
Prevention of the device from booting
•
Irreversible damage to the i.MX51A processor (worst-case scenario)
Stop Mode
• External reference clocks
enabled
• No power gating for ARM and
processing units
• HPM voltage
VDDGP = 1.0 V, VCC = 1.225 V, VDDA = 1.2 V
All PLLs off, all CCM-generated clocks off
CKIL input on with 32 kHz signal present
All modules disabled
USBPHY PLL off
External (MHz) crystal and on-chip oscillator
powered and generating reference clock
No external resistive loads that cause current flow
TA = 25
°C
VDDGP
50
mA
VCC
2
VDDA
1.15
NVCC_OSC
1.5
Total
63
mW
Table 17. USB PHY Current Consumption
Parameter
Conditions
Typical @ 25 °C
Max
Unit
Analog Supply
VDDA33 (3.3 V)
Full Speed
RX
5.5
6
mA
TX
7
8
High Speed
RX
5
6
TX
5
6
Analog Supply
NVCC_USBPHY (2.5 V)
Full Speed
RX
6.5
7
mA
TX
6.5
7
High Speed
RX
12
13
TX
21
22
Digital Supply
VCC (1.2 V)
Full Speed
RX
6
7
mA
TX
6
7
High Speed
RX
6
7
TX
6
7
VDDA33 + NVCC_USBPHY +VCC
Suspend
50
100
μA
Table 16. i.MX51 Stop Mode Current and Power Consumption (continued)
Mode
Condition
Supply
Nominal
Unit



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