ATmega64M1 Automotive Atmel Corporation, ATmega64M1 Automotive Datasheet - Page 20

• Manufacturer Part Number: ATmega64M1 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega64M1 Automotive

• Flash (kbytes): 64 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): 4
• Eeprom (bytes): 2048
• 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

7647DS–AVR–08/08
5. Wrong TSOFFSET manufacturing calibration value.
6. PD0-PD3 set to outputs and PD4 pulled down following power-on with external reset
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.
Erroneous value of TSOFFSET programmed in signature byte.
(TSOFFSET was introduced from REVB silicon).
Problem fix / workaround
To identify RevB with wrong TSOFFSET value, check device signature byte at address
0X3F if value is not 0X42 (Ascii code ‘B’) then use the following formula.
TS_OFFSET(True) = (150*(1-TS_GAIN))+TS_OFFSET.
active.
At power-on with the external reset signal active the four I/O lines PD0-PD3 may be forced
into an output state. Normally these lines should be in an input state. PD4 may be pulled
down with internal 220 kOhm resistor. Following release of the reset line (whatever is the
startup time) with the clock running the I/Os PD0-PD4 will adopt their intended input state.
Problem fix / workaround
None
Before enabling the HEADER, the master must set the appropriate LIN13 bit value in
LINCR register.
– Before enabling the RESPONSE, use the following function:
– Once the RESPONSE is received or sent (having RxOK or TxOK as well as
LERR), use the following function:
unsigned char
}
void
}
void
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 !
{
ATmega16/32/64/M1/C1
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