MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 892

• 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
10.8.28 ClkCtrl Status (HW_CLKCTRL_STATUS)
The STATUS control register provides read only status of the CPU frequecy limits.
EXAMPLE
HW_CLKCTRL_STATUS_RD(BF_CLKCTRL_STATUS_CPU_LIMIT());
Address:
892
Reset
Reset
RESET_ENABLE
THERMAL_
THERMAL_
CPU_LIMIT
Bit
Bit
DEFAULT
W
W
RESET_
R
R
RSRVD
31 30
CHIP
Field
Field
29 0
DIG
3
2
1
0
CPU_LIMIT
31
15
0
0
HW_CLKCTRL_STATUS
30
14
0
0
Analog Reset Control. Setting this bit to a logic one will enable the thermal reset control logic.
Reserved.
Software reset. Setting this bit to a logic one will reset the ENTIRE chip, no exceptions. This bit will also be
reset after the full chip reset cycle completes.
Software reset. Setting this bit to a logic one will reset the digital sections of the chip. The DCDC and power
module will not be reset. This bit will also be reset after the reset cycle completes.
CPU Limiting. 00: full cpu frequency, 01: limit cpu frequency to 455 MHz, 10: limit cpu frequency to 411
MHz, 11: limit cpu frequency to 360 MHz
Always set to zero (0).
29
13
HW_CLKCTRL_RESET field descriptions (continued)
0
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
28
12
0
0
HW_CLKCTRL_STATUS field descriptions
27
11
0
0
8004_0000h base + 1F0h offset = 8004_01F0h
26
10
0
0
25
0
0
9
RSRVD[15:0]
24
0
0
8
Description
Description
RSRVD[29:16]
23
0
0
7
22
0
0
6
21
0
5
0
20
0
4
0
Freescale Semiconductor, Inc.
19
0
0
3
18
0
0
2
17
0
0
1
16
0
0
0