MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1513
MCIMX281AVM4B
Manufacturer Part Number
MCIMX281AVM4B
Description
IC MPU I.MX28 1.2 289MAPBGA
Manufacturer
Freescale Semiconductor
Series
i.MX28r
Datasheets
1.MCIMX283DVM4B.pdf
(2327 pages)
2.MCIMX283DVM4B.pdf
(20 pages)
3.MCIMX281AVM4B.pdf
(72 pages)
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
- Current page: 1513 of 2327
- Download datasheet (17Mb)
23.4.2 Rotary Decoder Up/Down Counter Register
The Rotary Decoder Up/Down Counter Register contains the timer counter value that counts
up or down as the rotary encoder is rotated.
This register contains the read-only current count for the rotary decoder.
EXAMPLE
count = HW_TIMROT_ROTCTRL_RD(); // Read count
Address:
Re-
23.4.3 Timer 0 Control and Status Register (HW_TIMROT_TIMCTRL0)
The Timer 0 Control and Status Register specifies timer control parameters, as well as
interrupt status and the enable for Timer 0.
HW_TIMROT_TIMCTRL0: 0x020
HW_TIMROT_TIMCTRL0_SET: 0x024
HW_TIMROT_TIMCTRL0_CLR: 0x028
HW_TIMROT_TIMCTRL0_TOG: 0x02C
EXAMPLE
Freescale Semiconductor, Inc.
set
Bit
W
R
UPDOWN
31
RSRVD1
0
31 16
Field
15 0
30
0
29
0
(HW_TIMROT_ROTCOUNT)
HW_TIMROT_ROTCOUNT
28
0
Always write zeroes to this bit field.
At each edge of the Rotary A input, the Rotary B value is sampled, similarly at each edge of the Rotary B
input, the Rotary A input is sampled. These values drive a rotary decoder state machine that determines
when this counter is incremented or decremetned. When set in the RELATIVE mode, reads from this register
clear this register as a side effect. Counter values in this register are signed 16-bit values.
27
0
26
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
25
0
RSRVD1
24
0
HW_TIMROT_ROTCOUNT field descriptions
23
0
22
0
21
0
8006_8000h base + 10h offset = 8006_8010h
20
0
19
0
18
0
17
0
16
0
15
0
Description
14
0
13
0
Chapter 23 Timers and Rotary Decoder (TIMROT)
12
0
11
0
10
0
0
9
UPDOWN
0
8
0
7
0
6
0
5
0
4
3
0
0
2
0
1
1513
0
0
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