MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1747
MCIMX281AVM4B
Manufacturer Part Number
MCIMX281AVM4B
Description
IC MPU I.MX28 1.2 289MAPBGA
Manufacturer
Freescale Semiconductor
Series
i.MX28r
Datasheets
1.MCIMX283DVM4B.pdf
(2327 pages)
2.MCIMX283DVM4B.pdf
(20 pages)
3.MCIMX281AVM4B.pdf
(72 pages)
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
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- Download datasheet (17Mb)
27.2.3.2 Reading 256 bytes from an EEPROM
//----------------------------------------------------------------------
// dma buffers to hold i2c command string for slave addres+W plus sub0,
// sub 1 and the second command, a slave address+R
// eePROM write address == 0xA0,
//----------------------------------------------------------------------
unsigned char eeprom_command_buffer[4] = {0xA0,0x34,0x12,0xA1};
//----------------------------------------------------------------------
// I2C DMA chain
//----------------------------------------------------------------------
const static reg32_t
{
};
const static reg32_t
{
Freescale Semiconductor, Inc.
0x0,
(BF_APBX_CHn_CMD_XFER_COUNT(256) |
(reg32_t) &eeprom_command_buffer[3],
BF_I2C_CTRL0_POST_SEND_STOP(BV_I2C_CTRL0_POST_SEND_STOP_SEND_STOP)|
BF_I2C_CTRL0_MASTER_MODE(BV_I2C_CTRL0_MASTER_MODE_MASTER)
BF_I2C_CTRL0_DIRECTION(BV_I2C_CTRL0_DIRECTION_RECEIVE)
BF_I2C_CTRL0_XFER_COUNT(256)
(reg32_t)
(BF_APBX_CHn_CMD_XFER_COUNT(1) |
BF_APBX_CHn_CMD_WAIT4ENDCMD(1)
BF_APBX_CHn_CMD_SEMAPHORE(1)
BF_APBX_CHn_CMD_CMDWORDS(1)
BF_APBX_CHn_CMD_CHAIN(0)
BV_FLD(APBX_CHn_CMD, COMMAND, DMA_WRITE)),
I2C_DMA_CMD3,
0x00,SUB1, SUB0, I2CADDR+W
1PIO, chaining, DMA read
Figure 27-10. I
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
BUFFER ADDRESS
NEXTCMD_ADDR
HW_I2C_CTRL0=
3
I2C_DMA_CMD3[4] =
I2C_DMA_CMD2[4] =
0x000B0003
1PIO, chaining, DMA read
1
1
0x000000, I2CADDR+R
2
0
BUFFER ADDRESS
NEXTCMD_ADDR
read address == 0xA1
C Reading 256 Bytes from an EEPROM
HW_I2C_CTRL0=
0
1
Pointer to DMA buffer
1
Pointer to next ccw
0x002B0001
10
|
|
|
|
1
1
0
0
1
10
// last command
NEXTCMD_ADDR=0
BUFFER ADDRESS
256
HW_I2C_CTRL0=
1 PIO,IRQ, no chaining,
0x00120100
DMA write
256-Byte
Block
Data
1
1
1
|
|
1
0
01
Chapter 27 Inter IC (I2C)
1747
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