AT91SAM7A1-AU Atmel, AT91SAM7A1-AU Datasheet - Page 298

• Manufacturer Part Number: AT91SAM7A1-AU
• Description: IC ARM7 MCU 32BIT ROMLESS144LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7A1-AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 40MHz
• Connectivity: CAN, EBI/EMI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• For Use With: AT91SAM7A1-EK - BOARD EVAL FOR AT91SAM7A1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

25.16.7
Name:
Access:
Offset:
• CANENA: CAN Enabled
0: CAN is disabled.
1: CAN is enabled.
No interrupt is generated on CAN enable or disable.
• CANINIT: CAN Initialized
0: CAN is initialized.
1: CAN is in initialization phase.
During initialization phase, channel registers cannot be written. This bit does not generate an interrupt. After the initializa-
tion phase, this bit returns to 0 and the ENDINIT bit is set to a logical 1.
• ENDINIT: End of CAN Initialization
0: No end of CAN initialization.
1: End of CAN initialization phase.
• ERPAS: Error Passive
0: No transition in error passive mode.
1: CAN enters in error passive mode.
• BUSOFF: Bus Off
0: No transition in bus off mode.
1: CAN enters in bus off mode.
• ABRQ: CAN Abort Request
0: No CAN abort requested.
1: All the enabled channels are disabled. If this bit is set during communication, the transmission will end.
No interrupt is generated on CAN abort request activation or deactivation.
• ISS: Interrupt Source Status
0: No interrupt in any channel.
1: At least one interrupt occurred in a channel (read CAN_ISSR for more information).
298
ISS
31
23
15
–
7
AT91SAM7A1
CAN Status Register
CAN_SR
Read-only
0x070
30
22
14
–
6
–
ABRQ
29
21
13
–
5
BUSOFF
28
20
12
–
4
REC
TEC
ERPAS
27
19
11
–
3
ENDINIT
26
18
10
–
2
CANINIT
25
17
9
–
1
6048B–ATARM–29-Jun-06
CANENA
24
16
8
–
0