IMX7ULPIECB2 datasheet(30/112 Pages) NXP

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Table 3. JTAG device identification register information

Silicon Revision

Part Identification Number (PIN)

Part Revision Number (PRN)

10'b0011100001

4’b0000

10'b0011100001

4’b0001

10'b0011100001

4’b0010

10'b0011100001

4’b0011

The contents of the JTAD ID register are also mirrored in a SIM register called

JTAG_ID_REG (address 0x410A_308C).

5.3 Oscillators and PLLs

5.3.1 System oscillator (SYS OSC)

The system oscillator (SYS OSC) is a crystal oscillator. The SYS OSC, in conjunction

with an external crystal or resonator, generates a reference clock for this chip. It also

provides the option for an external input clock to EXTAL signal directly.

5.3.2 Real-Time Clock Oscillator (RTC OSC)

The RTC OSC module provides the clock source for the Real-Time Clock module. The

RTC OSC module, in conjunction with an external crystal, generates a 32.678 kHz

reference clock for the RTC.

5.3.3 USB PLL

The USB PLL is embedded in the USB transceiver block. This PLL allows an exact 480

MHz to be generated from a supported reference clock of 24 MHz. The output of this

PLL is primarily used for USB operations. The USB PLL clock is also made available

as a clock source for other peripherals in the SoC.

System control modules

i.MX 7ULP Applications Processor—Industrial, Rev. 1, 07/2021

NXP Semiconductors

IMX7ULPIECB2 Datasheet(PDF) 30 Page - NXP Semiconductors