ATTINY167-15XD Atmel, ATTINY167-15XD Datasheet - Page 223

• Manufacturer Part Number: ATTINY167-15XD
• Description: MCU AVR 16K FLASH 15MHZ 20-TSSOP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY167-15XD

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, LIN, SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 16
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 20-TSSOP
• Processor Series: ATTINY1x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Maximum Clock Frequency: 16 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• For Use With: ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

20.2.7
7728G–AVR–06/10
Simple Assembly Code Example for a Boot Loader
Note that the RWWSB bit will always be read as zero in ATtiny87/167. Nevertheless, it is
recommended to check this bit as shown in the code example, to ensure compatibility with
devices supporting Read-While-Write.
.equ PAGESIZEB = PAGESIZE*2
.org SMALLBOOTSTART
Write_page:
Wrloop:
Rdloop:
;- The routine writes one page of data from RAM to Flash
;
;
;- Error handling is not included
;- Registers used: r0, r1, temp1 (r16), temp2 (r17), looplo (r24),
;
; - Storing and restoring of registers is not included in the routine
;
; Page Erase
ldi
rcall Do_spm
; Clear temporary page buffer
ldi
rcall Do_spm
; Transfer data from RAM to Flash temporary page buffer
ldi
ldi
ld
ld
ldi
rcall Do_spm
adiw
sbiw
brne
; Execute Page Write
subi
sbci
ldi
rcall Do_spm
; Clear temporary page buffer
ldi
rcall Do_spm
; Read back and check, optional
ldi
ldi
subi
sbci
lpm
the first data location in RAM is pointed to by the Y-pointer
the first data location in Flash is pointed to by the Z-pointer
register usage can be optimized at the expense of code size
spmcsrval, (1<<PGERS) | (1<<SELFPGEN)
spmcsrval, (1<<CPTB) | (1<<SELFPGEN)
looplo, low(PAGESIZEB)
loophi, high(PAGESIZEB)
r0, Y+
r1, Y+
spmcsrval, (1<<SELFPGEN)
ZH:ZL, 2
loophi:looplo, 2
Wrloop
ZL, low(PAGESIZEB)
ZH, high(PAGESIZEB)
spmcsrval, (1<<PGWRT) | (1<<SELFPGEN)
spmcsrval, (1<<CPTB) | (1<<SELFPGEN)
looplo, low(PAGESIZEB)
loophi, high(PAGESIZEB)
YL, low(PAGESIZEB)
YH, high(PAGESIZEB)
r0, Z+
loophi (r25), spmcsrval (r20)
; AGESIZEB is page size in BYTES, not words
; use subi for PAGESIZEB<=256
; restore pointer
; not required for PAGESIZEB<=256
; init loop variable
; not required for PAGESIZEB<=256
; restore pointer
; init loop variable
; not required for PAGESIZEB<=256
ATtiny87/ATtiny167
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