MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 1505

• Manufacturer Part Number: MCIMX286CVM4B
• Description: IC MPU I.MX286 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX286CVM4B

• 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: Compliant

Chapter 23 Timers and Rotary Decoder (TIMROT)
The state of the 32-bit free-running count can be read by the CPU for each timer.
23.2.3 Using External Signals as Inputs
External signals can be used as inputs to the block. They can be used as either the test signal
or sampling input signals (duty cycle or normal timer mode). This can be accomplished by
using the rotary input pins or any unused PWM pins. If PWM pins are being used for this
purpose, conflicts with the PWM or other blocks that could drive the pins as outputs must
be avoided. In this case, the PWM pins being used should be programmed as GPIO inputs.
(See
Pin Control and GPIO Overview
for details.) Then, the external signal can be wired
to the pin, and the PWM number selected in the appropriate TIMROT registers.
23.2.4 Timer 3 and Duty Cycle Mode
Timer 3 can operate in the same modes as Timer 0, Timer 1, and Timer 2. However, it has
an additional duty cycle measurement mode.
Figure 23-4
shows a detailed view of Timer
3 in duty cycle mode. This mode can be enabled by writing 1 to bit DUTY_CYCLE of
Register TIMER3 Control and Status Register. When this bit is set, no matter what value
MATCH MODE of Register TIMER3 Control and Status Register is, Timer 3 works
in duty cycle mode.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Freescale Semiconductor, Inc.
1505