ATMEGA8535-16JC Atmel, ATMEGA8535-16JC Datasheet - Page 234

• Manufacturer Part Number: ATMEGA8535-16JC
• Description: IC AVR MCU 8K 16MHZ COM 44-PLCC
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8535-16JC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: 2-Wire, SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 2 x 8 bit
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• On-chip Adc: 2 bit
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

234
ATmega8535(L)
Wrloop:
Rdloop:
Return:
Do_spm:
Wait_spm:
; re-enable the RWW section
ldi
rcall
; transfer data from RAM to Flash page buffer
ldi
ldi
ld
ld
ldi
rcall
adiw ZH:ZL, 2
sbiw loophi:looplo, 2
brne Wrloop
; execute page write
subi
sbci
ldi
rcall
; re-enable the RWW section
ldi
rcall
; read back and check, optional
ldi
ldi
subi
sbci
lpm
ld
cpse r0, r1
rjmp
sbiw loophi:looplo, 1
brne Rdloop
; return to RWW section
; verify that RWW section is safe to read
in
sbrs
ret
; re-enable the RWW section
ldi
rcall
rjmp
; check for previous SPM complete
in
sbrc
rjmp
; input: spmcrval determines SPM action
; disable interrupts if enabled, store status
temp1, RWWSB
spmcrval, (1<<RWWSRE) | (1<<SPMEN)
Do_spm
looplo, low(PAGESIZEB)
loophi, high(PAGESIZEB)
r0, Y+
r1, Y+
spmcrval, (1<<SPMEN)
Do_spm
ZL, low(PAGESIZEB)
ZH, high(PAGESIZEB)
spmcrval, (1<<PGWRT) | (1<<SPMEN)
Do_spm
spmcrval, (1<<RWWSRE) | (1<<SPMEN)
Do_spm
looplo, low(PAGESIZEB)
loophi, high(PAGESIZEB)
YL, low(PAGESIZEB)
YH, high(PAGESIZEB)
r0, Z+
r1, Y+
Error
temp1, SPMCR
spmcrval, (1<<RWWSRE) | (1<<SPMEN)
Do_spm
Return
temp1, SPMCR
temp1, SPMEN
Wait_spm
; If RWWSB is set, the RWW section is not ready yet
;init loop variable
;not required for PAGESIZEB<=256
;use subi for PAGESIZEB<=256
;restore pointer
;not required for PAGESIZEB<=256
;init loop variable
;not required for PAGESIZEB<=256
;restore pointer
;use subi for PAGESIZEB<=256
2502K–AVR–10/06