AT90CAN32 Automotive Atmel Corporation, AT90CAN32 Automotive Datasheet - Page 252

• Manufacturer Part Number: AT90CAN32 Automotive
• Manufacturer: Atmel Corporation

Specifications of AT90CAN32 Automotive

• Flash (kbytes): 32 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Can: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

19.10.2
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AT90CAN32/64/128
CAN General Status Register - CANGSTA
• Bit 0 – SWRES: Software Reset Request
This auto resettable bit only resets the CAN controller.
• Bit 7 – Reserved Bit
This bit is reserved for future use.
• Bit 6 – OVFG: Overload Frame Flag
This flag does not generate an interrupt.
• Bit 5 – Reserved Bit
This bit is reserved for future use.
• Bit 4 – TXBSY: Transmitter Busy
This flag does not generate an interrupt.
• Bit 3 – RXBSY: Receiver Busy
This flag does not generate an interrupt.
• Bit 2 – ENFG: Enable Flag
This flag does not generate an interrupt.
Initial Value
Read/Write
Bit
– 0 - standby mode: the on-going communication is normally terminated and the CAN
– 1 - enable mode: the CAN channel enters in enable mode once 11 recessive bits has
– 0 - no reset
– 1 - reset: this reset is “ORed” with the hardware reset.
– 0 - no overload frame.
– 1 - overload frame: set by hardware as long as the produced overload frame is sent.
– 0 - transmitter not busy.
– 1 - transmitter busy: set by hardware as long as a frame (data, remote, overload or
– 0 - receiver not busy
– 1 - receiver busy: set by hardware as long as a frame is received or monitored.
– 0 - CAN controller disable: because an enable/standby command is not immediately
– 1 - CAN controller enable.
channel is frozen (the CONMOB bits of every MOb do not change). The transmitter
constantly provides a recessive level. In this mode, the receiver is not enabled but all the
registers and mailbox remain accessible from CPU.
been read.
error frame) or an ACK field is sent. Also set when an inter frame space is sent.
effective, this status gives the true state of the chosen mode.
7
-
-
-
OVFG
R
6
0
5
-
-
-
TXBSY
R
4
0
RXBSY
R
3
0
ENFG
2
R
0
BOFF
R
1
0
ERRP
R
0
0
CANGSTA
7682C–AUTO–04/08