ATmega32M1 Automotive Atmel Corporation, ATmega32M1 Automotive Datasheet - Page 188
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ATmega32M1 Automotive
Manufacturer Part Number
ATmega32M1 Automotive
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT90CAN128_AUTOMOTIVE.pdf
(225 pages)
2.ATMEGA16M1_AUTOMOTIVE.pdf
(12 pages)
3.ATMEGA16M1_AUTOMOTIVE.pdf
(25 pages)
4.ATMEGA16M1_AUTOMOTIVE.pdf
(367 pages)
Specifications of ATmega32M1 Automotive
Flash (kbytes)
32 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
27
Ext Interrupts
27
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Can
1
Lin
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
4
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
Yes
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 150
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
14
Input Capture Channels
1
Pwm Channels
10
32khz Rtc
No
Calibrated Rc Oscillator
Yes
- AT90CAN128_AUTOMOTIVE PDF datasheet
- ATMEGA16M1_AUTOMOTIVE PDF datasheet #2
- ATMEGA16M1_AUTOMOTIVE PDF datasheet #3
- ATMEGA16M1_AUTOMOTIVE PDF datasheet #4
- Current page: 188 of 367
- Download datasheet (7Mb)
16.10.2
188
Atmel ATmega16/32/64/M1/C1
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 – OVRG: 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.
Initial Value
Read/Write
– 0 - standby mode: The on-going transmission (if exists) is normally terminated and the
– 1 - enable mode: The CAN channel enters in enable mode once 11 recessive bits
– 0 - no reset
– 1 - reset: this reset is “ORed” with the hardware reset.
Bit
– 0 - no overload frame.
– 1 - overload frame: set by hardware as long as the produced overload frame is
– 0 - transmitter not busy.
– 1 - transmitter busy: set by hardware as long as a frame (data, remote, overload or
– 0 - receiver not busy
CAN 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. In this mode,
the receiver is not enabled but all the registers and mailbox remain accessible from
CPU.
has been read.
sent.
error frame) or an ACK field is sent. Also set when an inter frame space is sent.
Note:A standby mode applied during a reception may corrupt the on-going reception or set the
controller in a wrong state. The controller will restart correctly from this state if a soft-
ware reset (SWRES) is applied. If no reset is considered, a possible solution is to wait
for a lake of a receiver busy (RXBSY) before to enter in stand-by mode. The best solu-
tion is first to apply an abort request command (ABRQ) and then wait for the lake of the
receiver busy (RXBSY) before to enter in stand-by mode. In any cases, this standby
mode behavior has no effect on the CAN bus integrity.
7
-
-
-
OVRG
R
6
0
5
-
-
-
TXBSY
R
4
0
RXBSY
R
3
0
ENFG
R
2
0
BOFF
R
1
0
ERRP
R
0
0
7647G–AVR–09/11
CANGSTA
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