MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 876

• 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
10.8.16 EMI Clock Control Register (HW_CLKCTRL_EMI)
This register controls the clock dividers that generate the External Memory Interface (EMI)
clock. Note: Do not write register space when busy bit(s) are high.
EXAMPLE
HW_CLKCTRL_EMI_WR(BF_CLKCTRL_EMI_DIV_XTAL(1));
Address:
876
Reset
Reset
SYNC_MODE_
CLKGATE
Bit
Bit
W
W
R
R
RSRVD
Field
30 0
Field
EN
31
30
31
15
1
0
HW_CLKCTRL_EMI
30
14
RSRVD2
0
0
Always set to zero (0).
CLK_EMI crystal divider Gate. If set to 1, the EMI_CLK divider that is sourced by the crystal reference clock,
ref_xtal, is gated off. 0: CLK_EMI crystal divider is not gated
If set to 1, EMI_CLK is synchronous with the APBH clock. If set to 0, EMI_CLK is aysnchronous. In
synchronous operation, the EMI clock dividers control both EMI_CLK and APBH clock. Both xtal and ref_cpu
must be active to switch between asynchronous/synchronous operation.
29
13
0
0
HW_CLKCTRL_SPDIF field descriptions (continued)
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
28
12
0
0
HW_CLKCTRL_EMI field descriptions
8004_0000h base + F0h offset = 8004_00F0h
27
11
0
0
DIV_XTAL
26
10
0
0
25
0
0
9
24
0
1
8
Description
Description
23
RSRVD1
0
0
7
22
RSRVD3
0
0
6
21
0
5
0
20
0
4
0
Freescale Semiconductor, Inc.
19
DIV_EMI
0
0
3
18
0
0
2
17
0
0
1
16
0
1
0