MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 1504

• 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

Timer
returns to its default start value 0xFFFF_FFFF, then starts decrementing from 0xFFFF_FFFF
to 0. Every time it decreases to 0, it restores to 0xFFFF_FFFF and keeps decreasing
repeatedly. During this ceaseless decrement, interrupt is triggered every time free running
count equals match count.
Figure 23-3
In match mode, period timer interrupt can be triggered by modifying the match register to
a proper value adequately smaller than the current value of the match register in every
interrupt service routine, which is usually calculated by subtracting a delta from the current
value of the match register. To get a group of interrupts with fixed interval, constant delta
is used, and to get interrupts with variable interval, variable delta is used.
Any timer interrupt can be programmed as a FIQ or as a regular IRQ. See
(ICOLL) Overview
For proper detection of the input source signal, it should be much slower than the pre-scaled
APBX clock (not greater than one-third the frequency of the pre-scaled APBX clock).
Selecting the ALWAYS tick causes the timer to decrement continuously at the rate
established by the pre-scaled APBX clock. The NEVER TICK selection causes the timer
to stall.
1504
shows a detailed view of each timer in match mode.
Figure 23-3. Timer 0, Timer 1, Timer 2 or Timer 3 Detail
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
for programming details.
NEVER TICK
ROTARY_A
ROTARY_B
ALWAYS TICK
PWM[0]
PWM[1]
PWM[2]
PWM[3]
PWM[4]
PWM[5]
PWM[6]
PWM[7]
32-kHz
Input
32-Bit Match Count
Timer I/O
24-MHz
XTAL
Osc.
Divide
by n
Detect
Edge
APBX clk
Controller
Tick
Mode
Divide by
1, 2, 4, 8
match_mode == 1
32-Bit Running Count
== match & match_mode
Gated clk
?
Freescale Semiconductor, Inc.
Interrupt Collector