ATTINY26-16PI Atmel, ATTINY26-16PI Datasheet - Page 87
![IC AVR MCU 2K 16MHZ IND 20-DIP](/photos/6/80/68043/313-20-dip_sml.jpg)
ATTINY26-16PI
Manufacturer Part Number
ATTINY26-16PI
Description
IC AVR MCU 2K 16MHZ IND 20-DIP
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY26-16PI
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
16
Program Memory Size
2KB (1K x 16)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 11x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
20-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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SPI Slave Operation
Example
1477K–AVR–08/10
The following code demonstrates how to use the USI module as a SPI Master with maximum
speed (fsck = fck/2):
The following code demonstrates how to use the USI module as a SPI slave:
The code is size optimized using only 8 instructions (+ ret). The code example assumes that the
DO is configured as output and SCK pin is configured as input in the DDRB Register. The value
stored in register r16 prior to the function is called is transferred to the master device, and when
the transfer is completed the data received from the master is stored back into the r16 register.
SPITransfer_Fast:
ret
init:
...
SlaveSPITransfer:
SlaveSPITransfer_loop:
out
ldi
ldi
out
out
out
out
out
out
out
out
out
out
out
out
out
out
out
out
in
ldi
out
out
ldi
out
sbis
rjmp
in
ret
USIDR,r16
r16,(1<<USIWM0)+(0<<USICS0)+(1<<USITC)
r17,(1<<USIWM0)+(0<<USICS0)+(1<<USITC)+(1<<USICLK)
USICR,r16 ; MSB
USICR,r17
USICR,r16
USICR,r17
USICR,r16
USICR,r17
USICR,r16
USICR,r17
USICR,r16
USICR,r17
USICR,r16
USICR,r17
USICR,r16
USICR,r17
USICR,r16 ; LSB
USICR,r17
r16,USIDR
r16,(1<<USIWM0)+(1<<USICS1)
USICR,r16
USIDR,r16
r16,(1<<USIOIF)
USISR,r16
USISR,USIOIF
SlaveSPITransfer_loop
r16,USIDR
87
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