MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1526

• 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

Programmable Registers
23.4.16 Timer 3 Running Count Register
The Timer 3 Running Count Register contains the timer runningcounter values for Timer
3. NOTE: This timer can be put in a special duty cycle mode that will measure the duty
cycle of an input test signal.
The definitions of the fields change depending whether the timer is in normal or duty cycle
mode.
Address:
Re-
1526
set
Bit
W
R
31
SELECT
0
Field
3 0
30
0
29
0
HW_TIMROT_RUNNING_COUNT3
80F0h
(HW_TIMROT_RUNNING_COUNT3)
28
0
0x3
Selects the source for the timer tick that decrements the free running counter. Note: programming an
undefined value will result in "always tick" behavior. In duty cycle mode it increments the counter used to
calculate the high and low cycle counts.
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0xA
0xB
0xC
0xD
0xE
0xF
27
0
26
0
HW_TIMROT_TIMCTRL3 field descriptions (continued)
DIV_BY_8 — PreScale: Divide the APBX clock by 8.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
NEVER_TICK — Never tick. Freeze the count.
PWM0 — Input from PWM0.
PWM1 — Input from PWM1.
PWM2 — Input from PWM2.
PWM3 — Input from PWM3.
PWM4 — Input from PWM4.
PWM5 — Input from PWM5.
PWM6 — Input from PWM6.
PWM7 — Input from PWM7.
ROTARYA — Input from Rotary A.
ROTARYB — Input from Rotary B.
32KHZ_XTAL — Input from 32-kHz crystal.
8KHZ_XTAL — Input from 8-kHz (divided from 32-kHz crystal).
4KHZ_XTAL — Input from 4-kHz (divided from 32-kHz crystal).
1KHZ_XTAL — Input from 1-kHz (divided from 32-kHz crystal).
TICK_ALWAYS — Always tick.
25
0
24
0
23
0
22
0
21
0
20
0
19
0
LOW_RUNNING_COUNT
8006_8000h base + F0h offset = 8006_
18
0
17
0
16
0
15
0
Description
14
0
13
0
12
0
11
0
10
0
0
9
0
8
Freescale Semiconductor, Inc.
0
7
0
6
0
5
0
4
3
0
0
2
0
1
0
0