ATMEGA325A-MU Atmel, ATMEGA325A-MU Datasheet - Page 278
![IC MCU AVR 32K FLASH 64VQFN](/photos/12/13/121326/313-64-qfn_sml.jpg)
ATMEGA325A-MU
Manufacturer Part Number
ATMEGA325A-MU
Description
IC MCU AVR 32K FLASH 64VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA325A-MU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
54
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-VFQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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278
ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/645
Boot Loader Parameters (ATmega165A/ATmega165PA)
In
ming are given.
Table 25-6.
Note:
Table 25-6
Return:
Do_spm:
Wait_spm:
Wait_ee:
1
1
0
0
sbiw loophi:looplo, 1
brne Rdloop
; return to RWW section
; verify that RWW section is safe to read
in
sbrs temp1, RWWSB
ret
; re-enable the RWW section
ldi
call Do_spm
rjmp Return
; check for previous SPM complete
in
sbrc temp1, SPMEN
rjmp Wait_spm
; input: spmcrval determines SPM action
; disable interrupts if enabled, store status
in
cli
; check that no EEPROM write access is present
sbic EECR, EEWE
rjmp Wait_ee
; SPM timed sequence
out
spm
; restore SREG (to enable interrupts if originally enabled)
out
ret
1. The different BOOTSZ Fuse configurations are shown in
temp1, SPMCSR
spmcrval, (1<<RWWSRE) | (1<<SPMEN)
temp1, SPMCSR
temp2, SREG
SPMCSR, spmcrval
SREG, temp2
1
0
1
0
through
Boot Size Configuration
words
words
words
words
1024
128
256
512
Table
16
2
4
8
25-8, the parameters used in the description of the Self-Program-
; If RWWSB is set, the RWW section is not ready yet
Application Flash
Section
0x0000 - 0x1DFF
0x0000 - 0x1F7F
0x0000 - 0x1EFF
0x0000 - 0x1BFF
(1)
(ATmega165A/ATmega165PA)
;use subi for PAGESIZEB<=256
Boot Loader
Flash
Section
0x1F80 - 0x1FFF
0x1F00 - 0x1FFF
0x1E00 - 0x1FFF
0x1C00 - 0x1FFF
Figure 25-2
End
Application
Section
0x1DFF
0x1BFF
0x1F7F
0x1EFF
8285B–AVR–03/11
Boot Reset
Address
(Start Boot
Loader
Section)
0x1F80
0x1F00
0x1E00
0x1C00
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