IMX51A 查看數據表（PDF） - Freescale Semiconductor

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IMX51A

i.MX51A Automotive and Infotainment Applications Processors

Freescale Semiconductor 

Electrical Characteristics

1 Voltage at the package power supply contact must be maintained between the minimum and maximum voltages. The design

must allow for supply tolerances and system voltage drops.

2 The nominal values for the supplies indicate the target setpoint for a tolerance no tighter than ± 50 mV. Use of supplies with a

tighter tolerance allows reduction of the setpoint with commensurate power savings.

3 The NVCC_IPUx rails are isolated from one another. This allows the connection of different supply voltages for each one. For

example, NVCC_IPU2 can operate at 1.8 V while NVCC_IPU4 operates at 3.0 V.

4 In Read mode, Freescale recommends VDD_FUSE be floated or grounded. Tying VDD_FUSE to a positive supply (3.0 V–3.3

V) increases the possibility of inadvertently blowing fuses and is not recommended.

5 The NAND Flash supplies are composed of three groups: A, B, and C. Each group can be powered with a different supply

voltage. For example, NVCC_NANDF_A = 1.8 V, NVCC_NANDF_B = 3.0 V, NVCC_NANDF_C = 2.7 V.

6 The analog supplies should be isolated in the application design. Use of series inductors is recommended.

7 Operation of the HS-I2C and I2C is not guaranteed when operated between the supply voltages of 1.95 to 2.7 V.

Parameter Description

JTAG: TCK Operating Frequency

CKIL: Operating Frequency

CKIH: Operating Frequency

XTAL Oscillator

Table 14. Interface Frequency

Symbol

ftck

fckil

fckih

fxtal

Min

Max

See Table 98, "JTAG Timing," on page 127

See Table 73, "FPM Specifications," on page 77

See Table 46, "CAMP Electrical Parameters (CKIH1,

CKIH2)," on page 45

22

27

Unit

MHz

kHz

MHz

MHz

4.1.1 Supply Current

Table 15 shows the fuse supply current.

Table 15. Fuse Supply Current

Description

Symbol

Min

Typ

Max

Unit

eFuse Program Current.1

Current to required to program one eFuse bit: The associated

VDD_FUSE supply per Table 13.

Iprogram

—

60

TBD

mA

eFuse Read Current2

Current necessary to read an 8-bit eFuse word

Iread

—

TBD

TBD

mA

1 The current Iprogram is only required during program time (tprogram).

2 The current Iread is present for approximately TBD ns of the read access to the 8-bit word. The current is derived from the

DDR supply (NVCC_EMI_DRAM).

i.MX51A Automotive and Infotainment Applications Processors, Rev. 2

Freescale Semiconductor

19

Preliminary—Subject to Change Without Notice

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