ATmega32C1 Automotive Atmel Corporation, ATmega32C1 Automotive Datasheet - Page 177

• Manufacturer Part Number: ATmega32C1 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega32C1 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: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

16.4.3
16.4.4
16.4.5
7647G–AVR–09/11
Notes: 1. Phase error < 0
Baud Rate
Fault Confinement
Overload Frame
5. Synchronization Segment: SYNS
2. Phase error > 0
3. Phase error > 0
4. Phase error < 0
Tsyns=1
x
Tscl (
CLK
Figure 16-8. General Structure of a Bit Period
With no baud rate prescaler (BRP[5..0]=0) the sampling point comes one time quantum too
early. This leads to a fail according the ISO16845 Test plan. It is necessary to lengthen the
Phase Segment 1 by one time quantum and to shorten the Phase Segment 2 by one time
quantum to compensate.
The baud rate selection is made by T
Notes:
(c.f.
An overload frame is sent by setting an overload request (OVRQ). After the next reception, the
CAN channel sends an overload frame in accordance with the CAN specification. A status or
flag is set (OVRF) as long as the overload frame is sent.
fixed
F
Data
1. Tsyns = 1 x Tscl = (BRP[5..0]+ 1)/clk
2. Tprs = (1 to 8) x Tscl = (PRS[2..0]+ 1) x Tscl
3. Tphs1 = (1 to 8) x Tscl = (PHS1[2..0]+ 1) x Tscl
4. Tphs2 = (1 to 8) x Tscl = (PHS2[2..0]
5. Tsjw = (1 to 4) x Tscl = (SJW[1..0]+ 1) x Tscl
CAN
)
IO
Section 16.7 “Error Management” on page
1. The total number of Tscl (Time Quanta) in a bit time must be from 8 to 25.
2. PHS2[2..0] 2 is programmable to be PHS1[2..0] and
Tsyns(5)
Tbit
(1)
1
/
CLK
= Tsyns + Tprs + Tphs1 + Tphs2
IO
Tscl (TQ)
Tprs
Atmel ATmega16/32/64/M1/C1
bit
Bit Rate Prescaler
calculation:
one nominal bit
IO
(2)
Tbit
+ 1) x Tscl
(= 1TQ)
183).
Tphs1+Tsjw
Tphs1
or
(
1
)
1.
(
3
Sample
)
Point
Tphs2+Tsjw
Tphs2
or
Transmission
(
2
)
(
4
)
Point
177