ATmega32C1 Automotive Atmel Corporation, ATmega32C1 Automotive Datasheet - Page 314

• 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

25.9.2
314
Atmel ATmega16/32/64/M1/C1
Data Polling Flash
To program and verify the ATmega16/32/64/M1/C1 in the serial programming mode, the fol-
lowing sequence is recommended (See four byte instruction formats in
When a page is being programmed into the Flash, reading an address location within the page
being programmed will give the value 0xFF. At the time the device is ready for a new page, the
programmed value will read correctly. This is used to determine when the next page can be
written. Note that the entire page is written simultaneously and any address within the page
can be used for polling. Data polling of the Flash will not work for the value 0xFF, so when pro-
gramming this value, the user will have to wait for at least t
next page. As a chip-erased device contains 0xFF in all locations, programming of addresses
that are meant to contain 0xFF, can be skipped. See
1. Power-up sequence:
2. Wait for at least 20 ms and enable serial programming by sending the Programming
3. The serial programming instructions will not work if the communication is out of syn-
4. The Flash is programmed one page at a time. The memory page is loaded one byte
5. The EEPROM array is programmed one byte at a time by supplying the address and
6. Any memory location can be verified by using the Read instruction which returns the
7. At the end of the programming session, RESET can be set high to commence normal
8. Power-off sequence (if needed):
Apply power between V
systems, the programmer can not guarantee that SCK is held low during power-up. In
this case, RESET must be given a positive pulse of at least two CPU clock cycles
duration after SCK has been set to “0”.
Enable serial instruction to pin MOSI.
chronization. When in sync. the second byte (0x53), will echo back when issuing the
third byte of the Programming Enable instruction. Whether the echo is correct or not,
all four bytes of the instruction must be transmitted. If the 0x53 did not echo back,
give RESET a positive pulse and issue a new Programming Enable command.
at a time by supplying the 6 LSB of the address and data together with the Load Pro-
gram Memory Page instruction. To ensure correct loading of the page, the data low
byte must be loaded before data high byte is applied for a given address. The Pro-
gram Memory Page is stored by loading the Write Program Memory Page instruction
with the 8 MSB of the address. If polling is not used, the user must wait at least
t
gramming interface before the Flash write operation completes can result in incorrect
programming.
data together with the appropriate Write instruction. An EEPROM memory location is
first automatically erased before new data is written. If polling is not used, the user
must wait at least t
chip erased device, no 0xFFs in the data file(s) need to be programmed.
content at the selected address at serial output MISO.
operation.
Set RESET to “1”.
Turn V
WD_FLASH
CC
power off.
before issuing the next page. (See
WD_EEPROM
CC
and GND while RESET and SCK are set to “0”. In some
before issuing the next byte. (See
Table
Table 25-16
25-16.) Accessing the serial pro-
WD_FLASH
for t
Table
before programming the
WD_FLASH
Table
25-16.) In a
25-17):
value.
7647G–AVR–09/11