ATmega16U2 Atmel Corporation, ATmega16U2 Datasheet - Page 26

• Manufacturer Part Number: ATmega16U2
• Manufacturer: Atmel Corporation

Specifications of ATmega16U2

• Flash (kbytes): 16 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: 21
• 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): 0.5
• Eeprom (bytes): 512
• 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

26
;*F************************************************************************
**
; NAME: wait_spmen
;--------------------------------------------------------------------------
--
; PARAMS:
;--------------------------------------------------------------------------
--
; PURPOSE:
;**************************************************************************
**
WAIT_SPMEN:
END
RCALL
MOV
LDI
OUT SPMCSR, R18 ; r18 decides function
SPM
RJMP
MOVR0, R18
INR18, SPMCSR
SBRC
RJMP
MOVR18, R0
RET
WAIT_SPMEN
R18,SPMEN
WAIT_SPMEN
WAIT_SPMEN
R0,R16
R18,((1<<BLBSET)|(1<<SPMEN))
none
Performs an active wait on SPME flag
; get SPMCR into r18
; Wait for SPMEN flag cleared
; write lockbits
; Wait for SPMEN flag cleared
; Wait for SPMEN flag cleared
7618C–AVR–07/08