MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1376

• 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
19.4.11 Entropy Latched Register (HW_DIGCTL_ENTROPY_LATCHED)
The Entropy Latched Register is a read-only test value register.
Address:
Re-
19.4.12 Digital Control Microseconds Counter Register
The Digital Control Microseconds Counter Register is a read-only test value register.
HW_DIGCTL_MICROSECONDS: 0x0C0
HW_DIGCTL_MICROSECONDS_SET: 0x0C4
HW_DIGCTL_MICROSECONDS_CLR: 0x0C8
HW_DIGCTL_MICROSECONDS_TOG: 0x0CC
This fixed-rate timer always increments at 24.0 MHz divided by 24 or 1.0 MHz. It does not
generate an interrupt.
EXAMPLE
1376
set
Bit
W
R
31
0
VALUE
VALUE
Field
31 0
Field
31 0
30
0
StartTime = HW_DIGCTL_MICROSECONDS_RD();
EndTime = HW_DIGCTL_MICROSECONDS_RD();
29
0
HW_DIGCTL_ENTROPY_LATCHED
C0A0h
(HW_DIGCTL_MICROSECONDS)
28
0
This read-only bit field always reads back the results of an entropy calculation. It is used to randomize the
seeds for random number generators.
When the LATCH_ENTROPY bit in the HW_DIGCTL_CTRL register is set to 1, the value of the
HW_DIGCTL_ENTROPY register is latched into this register. This can be used to latch a stable random
value on players where the PSWITCH is not deasserted after power-up.
27
0
26
0
HW_DIGCTL_ENTROPY_LATCHED field descriptions
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
25
0
24
0
HW_DIGCTL_ENTROPY field descriptions
23
0
22
0
21
0
20
0
19
0
18
8001_C000h base + A0h offset = 8001_
0
17
0
VALUE
16
0
15
0
Description
Description
14
0
13
0
12
0
11
0
10
0
0
9
0
8
Freescale Semiconductor, Inc.
0
7
0
6
0
5
0
4
3
0
0
2
0
1
0
0