MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 863

• 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

10.8.6 CPU Clock Control Register (HW_CLKCTRL_CPU)
The CPUCLK Clock Control Register provides controls for generating the ARM CPUCLK.
HW_CLKCTRL_CPU: 0x050
HW_CLKCTRL_CPU_SET: 0x054
HW_CLKCTRL_CPU_CLR: 0x058
HW_CLKCTRL_CPU_TOG: 0x05c
Note: Do not write register space when busy bit(s) are high.
EXAMPLE
HW_CLKCTRL_CPU_WR(BF_CLKCTRL_DIV_CPU(12)); // 480 MHz / 12 = 40 MHz
Address:
Freescale Semiconductor, Inc.
Reset
HOLD_RING_
Bit
W
RSRVD2
RSRVD1
CP_SEL
POWER
R
OFF_B
25 24
Field
22 0
27
26
23
31
RSRVD5
0
HW_CLKCTRL_CPU
30
0
Always set to zero (0).
TEST MODE FOR FREESCALE USE ONLY. Adjust VCO phase.
TEST MODE FOR FREESCALE USE ONLY. Adjusts charge pump current.
PLL Power On (0 = PLL off; 1 = PLL On). Allow 10 us after turning the PLL on before ungating the PLL and
using it as a clock source. This is the time the PLL takes to lock.
Always set to zero (0).
HW_CLKCTRL_PLL2CTRL0 field descriptions (continued)
29
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
28
0
8004_0000h base + 50h offset = 8004_0050h
27
0
26
0
25
0
24
0
Description
Chapter 10 Clock Generation and Control (CLKCTRL)
23
0
22
0
DIV_XTAL
21
0
20
0
19
0
18
0
17
0
16
1
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