MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1756

• 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
Address:
Re-
27.5.3 I2C Timing Register 1 (HW_I2C_TIMING1)
The timing for various phases of I2C Controller Commands are further defined by fields in
the I2C Timing Register 1.
HW_I2C_TIMING1: 0x020
HW_I2C_TIMING1_SET: 0x024
HW_I2C_TIMING1_CLR: 0x028
HW_I2C_TIMING1_TOG: 0x02C
This register is primarily used for clock and timing generation.
EXAMPLE
HW_I2C_TIMING1_WR(0x00800030); // low time at 128, write bit at 48 for 95 kHz at 24 MHz
HW_I2C_TIMING1_WR(0x001F000F); // low time at 31, write bit at 15 for 400 kHz at 24 MHz
Address:
Re-
1756
set
set
Bit
Bit
W
W
R
R
HIGH_COUNT
RCV_COUNT
31
31
0
0
RSVD2
RSVD1
31 26
25 16
15 10
Field
9 0
30
30
0
0
RSVD2
RSVD2
29
29
0
0
HW_I2C_TIMING0
HW_I2C_TIMING1
28
28
0
0
Always set this bit field to zero.
Load this bit field with the APBX clock count for the high period of the I2C clock.
Always set this bit field to zero.
Load this bit field with the APBX clock count for capturing read data after the I2C clock goes high.
27
27
0
0
26
26
0
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
25
25
0
0
24
24
0
0
23
23
0
1
8005_8000h base + 10h offset = 8005_8010h
8005_8000h base + 20h offset = 8005_8020h
HW_I2C_TIMING0 field descriptions
HIGH_COUNT
LOW_COUNT
22
22
1
0
21
21
1
0
20
20
1
0
19
19
1
0
18
18
0
0
17
17
0
0
16
16
0
0
15
15
0
0
Description
14
14
0
0
RSVD1
RSVD1
13
13
0
0
12
12
0
0
11
11
0
0
10
10
0
0
0
0
9
9
0
0
8
8
Freescale Semiconductor, Inc.
0
0
7
7
XMIT_COUNT
RCV_COUNT
0
0
6
6
1
1
5
5
1
1
4
4
3
0
3
0
0
0
2
2
0
0
1
1
0
0
0
0