AT91SAM7X128 Atmel, AT91SAM7X128 Datasheet - Page 515
![no-image](/images/manufacturer_photos/0/0/78/atmel_sml.jpg)
AT91SAM7X128
Manufacturer Part Number
AT91SAM7X128
Description
MCU 32-Bit 91S ARM7TDMI RISC 128KB Flash 1.8V/3.3V 100-Pin LQFP
Manufacturer
Atmel
Datasheet
1.AT91SAM7X512-AU-999.pdf
(687 pages)
Specifications of AT91SAM7X128
Package
100LQFP
Device Core
ARM7TDMI
Family Name
91S
Maximum Speed
55 MHz
Ram Size
32 KB
Program Memory Size
128 KB
Operating Supply Voltage
1.8|3.3 V
Data Bus Width
32 Bit
Program Memory Type
Flash
Number Of Programmable I/os
62
Interface Type
CAN/Ethernet/SPI/I2S/TWI/USART/USB
On-chip Adc
8-chx10-bit
Operating Temperature
-40 to 85 °C
Number Of Timers
3
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT91SAM7X128-AU
Manufacturer:
ATMEL
Quantity:
1 045
Part Number:
AT91SAM7X128-AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
AT91SAM7X128-CU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT91SAM7X128B-AU
Manufacturer:
Atmel
Quantity:
1 929
Part Number:
AT91SAM7X128B-AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
- Current page: 515 of 687
- Download datasheet (11Mb)
36.6.4.3
36.6.4.4
6120H–ATARM–17-Feb-09
Autobaud Mode
Error Detection
Figure 36-6. CAN Resynchronization
The autobaud feature is enabled by setting the ABM field in the CAN_MR register. In this mode,
the CAN controller is only listening to the line without acknowledging the received messages. It
can not send any message. The errors flags are updated. The bit timing can be adjusted until no
error occurs (good configuration found). In this mode, the error counters are frozen. To go back
to the standard mode, the ABM bit must be cleared in the CAN_MR register.
There are five different error types that are not mutually exclusive. Each error concerns only spe-
cific fields of the CAN data frame (refer to the Bosch CAN specification for their
correspondence):
• CRC error (CERR bit in the CAN_SR register): With the CRC, the transmitter calculates a
• Bit-stuffing error (SERR bit in the CAN_SR register): If a node detects a sixth consecutive
• Bit error (BERR bit in CAN_SR register): A bit error occurs if a transmitter sends a dominant
• Form Error (FERR bit in the CAN_SR register): If a transmitter detects a dominant bit in one
checksum for the CRC bit sequence from the Start of Frame bit until the end of the Data
Field. This CRC sequence is transmitted in the CRC field of the Data or Remote Frame.
equal bit level during the bit-stuffing area of a frame, it generates an Error Frame starting with
the next bit-time.
bit but detects a recessive bit on the bus line, or if it sends a recessive bit but detects a
dominant bit on the bus line. An error frame is generated and starts with the next bit time.
of the fix-formatted segments CRC Delimiter, ACK Delimiter or End of Frame, a form error
has occurred and an error frame is generated.
(before resynchronization)
(before resynchronization)
resynchronization
resynchronization
Nominal bit time
Nominal bit time
Bit time with
Bit time with
Received
Received
data bit
data bit
THE PHASE ERROR IS POSITIVE
(the transmitter is slower than the receiver)
THE PHASE ERROR IS NEGATIVE
(the transmitter is faster than the receiver)
AT91SAM7X512/256/128 Preliminary
SYNC_
SYNC_
SEG
SEG
PHASE_
PHASE_SEG2
Phase error
SEG2
Phase error
Phase error (max Tsjw)
PROP_SEG
PROP_SEG
SYNC_
SEG
SYNC_
SEG
PROP_SEG
PHASE_SEG1 PHASE_SEG2
PHASE_SEG1
PROP_SEG
Sample point
Nominal
after resynchronization
Phase error (max Tsjw)
PHASE_SEG1
Sample point
Sample point
after resynchronization
PHASE_SEG2
PHASE_SEG1
SYNC_
PHASE_SEG2
SEG
Nominal
Sample point
PHASE_SEG2
SYNC_
SEG
SYNC_
SEG
SYNC_
SEG
515
Related parts for AT91SAM7X128
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![AT91SAM9R64-CU](/photos/12/13/121356/144-lfbga_tmb.jpg)
Part Number:
Description:
MCU ARM9 64K SRAM 144-LFBGA
Manufacturer:
Atmel
Datasheet:
![AT91SAM7A3-AU](/photos/6/76/67646/313-100-lqfp_tmb.jpg)
Part Number:
Description:
IC ARM7 MCU FLASH 256K 100LQFP
Manufacturer:
Atmel
Datasheet:
![AT91SAM9G20B-CU](/photos/12/13/121366/217-lfbga_tmb.jpg)
Part Number:
Description:
IC ARM9 MPU 217-LFBGA
Manufacturer:
Atmel
Datasheet:
![AT91SAM9261B-CU](/photos/12/13/121366/217-lfbga_tmb.jpg)
Part Number:
Description:
MCU ARM9 ULTRA LOW PWR 217-LFBGA
Manufacturer:
Atmel
Datasheet:
![AT91SAM9G45-CU](/photos/12/13/121367/324-tfbga-pkg_tmb.jpg)
Part Number:
Description:
MCU ARM9 324-TFBGA
Manufacturer:
Atmel
Datasheet:
![AT91SAM9G10-CU](/photos/12/13/121366/217-lfbga_tmb.jpg)
Part Number:
Description:
IC MCU ARM9 SAMPLING 217CBGA
Manufacturer:
Atmel
Datasheet:
![AT91SAM9260B-CU](/photos/12/13/121366/217-lfbga_tmb.jpg)
Part Number:
Description:
IC ARM9 MCU 217-LFBGA
Manufacturer:
Atmel
Datasheet:
![AT91SAM9260B-QU](/photos/6/73/67311/313-208-pqfp_tmb.jpg)
Part Number:
Description:
IC ARM9 MCU 208-PQFP
Manufacturer:
Atmel
Datasheet:
![AT91SAM7X512-AU](/photos/6/76/67646/313-100-lqfp_tmb.jpg)
Part Number:
Description:
MCU ARM 512K HS FLASH 100-LQFP
Manufacturer:
Atmel
Datasheet:
![AT91SAM7X512-CU](/photos/6/89/68968/313-100-cbga_tmb.jpg)
Part Number:
Description:
MCU ARM 512K HS FLASH 100-TFBGA
Manufacturer:
Atmel
Datasheet:
![AT91SAM9263B-CU](/photos/12/13/121367/324-tfbga-pkg_tmb.jpg)
Part Number:
Description:
IC ARM9 MCU 200 MHZ 324-TFBGA
Manufacturer:
Atmel
Datasheet:
![AT91RM9200-CJ-002](/photos/12/32/123245/256-bga_tmb.jpg)
Part Number:
Description:
IC ARM MCU 16BIT 128K 256BGA
Manufacturer:
Atmel
Datasheet:
![AT91SAM7S128-AU-001](/photos/12/13/121332/313-64-tqfp_tmb.jpg)
Part Number:
Description:
IC ARM7 MCU 32BIT 128K 64LQFP
Manufacturer:
Atmel
Datasheet:
![AT91SAM7SE256-AU](/photos/6/71/67112/128-lqfp_tmb.jpg)
Part Number:
Description:
IC ARM7 MCU FLASH 256K 128-LQFP
Manufacturer:
Atmel
Datasheet:
![AT91SAM7SE512-AU](/photos/6/71/67112/128-lqfp_tmb.jpg)
Part Number:
Description:
IC ARM7 MCU FLASH 512K 128-LQFP
Manufacturer:
Atmel
Datasheet: