ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 25
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ATmega32U2
Manufacturer Part Number
ATmega32U2
Description
Manufacturer
Atmel Corporation
Specifications of ATmega32U2
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
22
Ext Interrupts
20
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
1024
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
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
5
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
No
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
7618C–AVR–07/08
/*F************************************************************************
**
* NAME: flash_fill_temp_buffer
*--------------------------------------------------------------------------
--
* PARAMS:
* data16 :
* address:
* return:
*--------------------------------------------------------------------------
--
* PURPOSE:
* This function allows to load a word in the temporary flash buffer.
*--------------------------------------------------------------------------
--
* EXAMPLE:
* fill_temp_buffer(data16, address);
*--------------------------------------------------------------------------
--
* NOTE:
* the first paramater used the registers R16, R17
* The second parameter used the registers R18, R19
***************************************************************************
**/
flash_fill_temp_buffer:
;*F************************************************************************
**
; NAME: lock_wr_bits
;--------------------------------------------------------------------------
--
; PARAMS:
;--------------------------------------------------------------------------
--
; PURPOSE:
;**************************************************************************
**
lock_wr_bits:
RJMP
MOV
MOV
MOV
MOV
LDI
OUT SPMCSR, R20; r18 decides function
SPM
RJMP
WAIT_SPMEN
WAIT_SPMEN
R31,R19
R30,R18
R0,R17
R1,R16
R20,(1<<SPMEN)
none
R16/R17: word to load in the temporary buffer.
R18/R19: address of the word.
R16: value to write
; Store program memory
;Wait for SPMEN flag cleared
;move adress to z pointer (R31=ZH R30=ZL)
;move data16 to reg 0 and 1
; Wait for SPMEN flag cleared
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