IMX28CEC datasheet(8/70 Pages) FREESCALE

8 / 70 page

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

Freescale Semiconductor

HSADC

High-speed

ADC

Connectivity

peripherals

The high-speed ADC block is designed to sample an analog input with 12-bit

resolution and a sample rate of up to 2 Msps. The output of the HSADC block

can be moved to the external memory through APBH-DMA. A typical user

case of the HSADC is to work with the PWM block to drive an external linear

image scanner sensor.

I2C(2)

I2C module

Connectivity

peripherals

The I2C is a standard two-wire serial interface used to connect the chip with

peripherals or host controllers. The I2C operates up to 400 kbps in either I2C

master or I2C slave mode. Each I2C has a dedicated DMA channel and can

also controlled by CPU in PIO or PIO queue modes. It supports both 7-bit and

10-bit device address in master mode, and has programmable 7-bit address

in slave mode.

ICOLL

Interrupt

Collector

System control

The ARM9 CPU core has two interrupt input lines, IRQ and FIQ. The interrupt

collector (ICOLL) can steer any of 128 interrupt sources to either the FIQ or

IRQ line of the ARM9 CPU.

L2 Switch

3-Port L2

Switch

Network Control Programmable 3-Port Ethernet Switch with QOS

LCDIF

LCD Interface Multimedia

peripherals

The LCDIF provides display data for external LCD panels from simple

text-only displays to WVGA, 16/18/24 bpp color TFT panels. The LCDIF

supports all of these different interfaces by providing fully programmable

functionality and sharing register space, FIFOs, and ALU resources at the

same time. The LCDIF supports RGB (DOTCLK) modes as well as system

mode including both VSYNC and WSYNC modes.

LRADC

Low resolution

ADC module

Connectivity

peripherals

The sixteen-channel 12-bit low-resolution ADC (LRADC) block is used for

voltage measurement. Channels 0 – 6 measure the voltage on the seven

application-dependent LRADC pins. The auxiliary channels can be used for

a variety of uses, including a resistor-divider-based wired remote control,

external temperature sensing, touch-screen, and other measurement

functions.

OCOTP

Controller

On-chip OTP

controller

Security

The on-chip one-time-programmable (OCOTP) ROM serves the functions of

hardware and software capability bits, Freescale operations and unique-ID,

the customer-programmable cryptography key, and storage of various ROM

configuration bits.

PINCTRL

Pin control

and GPIO

System control

peripherals

Used for general purpose input/output to external ICs. Each GPIO bank

supports 32 bits of I/O.

Table 4. i.MX28 Digital and Analog Modules (continued)

Block

Mnemonic

Block Name

Subsystem

Brief Description

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