ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 22
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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
22
;**************************************************************************
**
flash_prg_page:
;*F************************************************************************
**
; NAME: flash_page_erase
;--------------------------------------------------------------------------
--
; PARAMS:
;--------------------------------------------------------------------------
--
; PURPOSE:
;--------------------------------------------------------------------------
--
; NOTE:
not
; erase the hardware temporary temp buffer.
; This function is for bootloader usage
;--------------------------------------------------------------------------
--
; REQUIREMENTS:
;**************************************************************************
**
flash_page_erase:
RCALL
MOV
MOV
OUT
LDI
OUT SPMCSR,R20; argument 2 decides function (r18)
SPM
RCALL
RCALL
RET
RCALL
MOV
MOV
OUT
LDI
OUT SPMCSR, R20; argument 2 decides function (r18)
SPM
RCALL
;RCALL
;
RET
This function does nt set the RWWSE bit after erase. Thus it does
WAIT_SPMEN
R31,R17
R30,R16
RAMPZ, R18
R20,$05
flash_rww_enable
WAIT_SPMEN
R31,R17
R30,R16
RAMPZ, R18
R20,$03
WAIT_SPMEN
WAIT_SPMEN
flash_rww_enable CAUTION DO NOT ACTIVATE HERE or
you will loose the entire page buffer content !!!
R18:17:R16: The byte address of the page
Launch the erase sequence of the target page
;Store program memory
;Store program memory
;Wait for SPMEN flag cleared
;move adress to z pointer (R31=ZH R30=ZL)
;(1<<PGWRT) + (1<<SPMEN))
;Wait for SPMEN flag cleared
;move adress to z pointer (R31=ZH R30=ZL)
;(1<<PGERS) + (1<<SPMEN)))
;Wait for SPMEN flag cleared
;Wait for SPMEN flag cleared
7618C–AVR–07/08