MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1501

• Manufacturer Part Number: MCIMX281AVM4B
• Description: IC MPU I.MX28 1.2 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX281AVM4B

• Core Processor: ARM9
• Core Size: 32-Bit
• Speed: 454MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, MMC, SmartCard, SPI, SSI, UART/USART, USB OTG
• Peripherals: DMA, I²S, LCD, POR, PWM, WDT
• Program Memory Size: 128KB (32K x 32)
• Program Memory Type: Mask ROM
• Ram Size: 32K x 32
• Voltage - Supply (vcc/vdd): 1.25 V ~ 5.25 V
• Data Converters: A/D 17x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 289-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -
• Eeprom Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Chapter 23
Timers and Rotary Decoder (TIMROT)
23.1 Timers and Rotary Decoder (TIMROT) Overview
The device implements four timers and a rotary decoder, as shown in
timers and decoder can take their inputs from any of the pins defined for PWM, rotary
encoders, or certain divisions from the 32-KHz clock input. Therefore, the PWM pins can
be inputs or outputs, depending on the application.
The timer/rotary decoder block is a programmed I/O interface connected to the APBX bus.
Recall that the APBX typically runs at a divided clock rate from the 24-MHz crystal clock.
Each timer and rotary channel can sample at a rate that is further subdivided from the APBX
clock. Each timer can select a different pre-scaler value.
Freescale Semiconductor, Inc.
ROTARY_B
ROTARY_A
32-kHz Osc.
Figure 23-1. Timers and Rotary Decoder Block Diagram
PWM[0]
PWM[1]
PWM[2]
PWM[3]
PWM[4]
PWM[5]
PWM[6]
PWM[7]
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
AHB Slave
APBX Master
ARM Core
Shared DMA
AHB
AHB-to-APBX Bridge
AHB Master
Programmable Registers
Timer/Rotary Decoder
SRAM
Timers and Rotary Decoder
Timer 2 2
Timer 3
Timer 0
Timer 1
Rotary Up/Down Counter
1/1, 1/ 2, 1/4, 1/8
1/1, 1/ 2, 1/4, 1/8
1/1, 1/ 2, 1/4, 1/8
1/1, 1/ 2, 1/4, 1/8
Divide
24-MHz
Figure
XTAL
by n
Osc.
23-1. The
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