MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 872

• 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
EXAMPLE
HW_CLKCTRL_SSP2_WR(BF_CLKCTRL_SSP2_DIV(40));
Address:
872
Reset
Reset
DIV_FRAC_EN
CLKGATE
Bit
Bit
W
W
RSRVD2
RSRVD1
R
R
28 10
BUSY
Field
8 0
DIV
31
30
29
9
31
15
1
0
HW_CLKCTRL_SSP2
30
14
0
0
CLK_SSP2 Gate. If set to 1, CLK_SSP2 is gated off. 0: CLK_SSP2 is not gated. When this bit is modified,
or when it is high, the DIV field should not change its value. The DIV field can change ONLY when this clock
gate bit field is low.
Always set to zero (0).
This read-only bit field returns a one when the clock divider is busy transfering a new divider value across
clock domains.
Always set to zero (0).
1 = Enable fractional divide. 0 = Enable integer divide.
The synchronous serial port clock frequency is determined by dividing the selected reference clock (ref_xtal
or ref_io) by the value in this bit field. This field can be programmed with a new value only when CLKGATE
= 0.
NOTE: The divider is set to divide by 1 at power-on reset. Do NOT divide by 0.
RSRVD1[15:10]
BUSY
29
13
0
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
28
12
0
0
HW_CLKCTRL_SSP2 field descriptions
8004_0000h base + B0h offset = 8004_00B0h
27
11
0
0
26
10
0
0
25
0
0
9
24
0
0
8
Description
23
RSRVD1[28:16]
0
0
7
22
0
0
6
21
0
5
0
DIV
20
0
4
0
Freescale Semiconductor, Inc.
19
0
0
3
18
0
0
2
17
0
0
1
16
0
1
0