ATmega32M1 Automotive Atmel Corporation, ATmega32M1 Automotive Datasheet - Page 352
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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: 352 of 367
- Download datasheet (7Mb)
30.1.4
352
Atmel ATmega16/32/64/M1/C1
Errata Description
1. Inopportune reset of the CANIDM registers
2. The AMPCMPx bits return 0
3. No comparison when amplifier is used as comparator input and ADC input
4. CRC calculation of diagnostic frames in LIN 2.x.
After the reception of a CAN frame in a MOb, the ID mask registers are reset.
Problem fix / workaround
Before enabling a MOb in reception, re-initialize the ID mask registers -
CANIDM[4..1].
When they are read the AMPCMPx bits in AMPxCSR registers return 0.
Problem fix / workaround
If the reading of the AMPCMPx bits is required, store the AMPCMPx value in a vari-
able in memory before writing in the AMPxCSR register and read the variable when
necessary.
When it is selected as ADC input, an amplifier receives no clock signal when the ADC
is stopped. In that case, if the amplifier is also used as comparator input, no analog
signal is propagated and no comparison is done.
Problem fix / workaround
Select another ADC channel rather than the working amplified channel.
Diagnostic frames of LIN 2.x use “classic checksum” calculation. Unfortunately, the
setting of the checksum model is enabled when the HEADER is transmitted/received.
Usually, in LIN 2.x the LIN/UART controller is initialized to process “enhanced check-
sums” and a slave task does not know what kind of frame it will work on before
checking the ID.
Problem fix / workaround
This workaround is to be implemented only in case of transmission/reception of diag-
nostics frames.
a. Slave task of master node:
b. For slaves nodes, the workaround is in 2 parts:
The time-out counter is disabled during the RESPONSE when the workaround is set.
– Once the RESPONSE is received or sent (having RxOK or TxOK as well as
Before enabling the HEADER, the master must set the appropriate LIN13 bit-
value in LINCR register.
– Before enabling the RESPONSE, use the following function:
unsigned char
}
void
}
void
LERR), use the following function:
temp = LINBTR;
LINCR = 0x00;
LINBTR = (1<<LDISR)|temp;
LINCR
LINDLR = 0x88;
LINCR = 0x00;
LINBTR = 0x00;
LINCR
lin_wa_tail(void)
lin_wa_head(void) {
= (1<<LIN13)|(1<<LENA)|(0<<LCMD2)|(0<<LCMD1)|(0<<LCMD0);
= (0<<LIN13)|(1<<LENA)|(0<<LCMD2)|(0<<LCMD1)|(0<<LCMD0);
temp;
// It is not a RESET !
// If it isn't already done
// It is not a RESET !
{
7647G–AVR–09/11
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