MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1513

• 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

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