ATTINY88-MMHR Atmel, ATTINY88-MMHR Datasheet - Page 134
![MCU AVR 8KB FLASH 12MHZ 28QFN](/photos/12/32/123209/28m1-vqfn_sml.jpg)
ATTINY88-MMHR
Manufacturer Part Number
ATTINY88-MMHR
Description
MCU AVR 8KB FLASH 12MHZ 28QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY48-MU.pdf
(302 pages)
Specifications of ATTINY88-MMHR
Core Processor
AVR
Core Size
8-Bit
Speed
12MHz
Connectivity
I²C, SPI
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
24
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
64 x 8
Ram Size
512 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
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 134 of 302
- Download datasheet (9Mb)
134
ATtiny48/88
The wired-ANDing of the bus lines is used to solve both these problems. The serial clocks from
all masters will be wired-ANDed, yielding a combined clock with a high period equal to the one
from the Master with the shortest high period. The low period of the combined clock is equal to
the low period of the Master with the longest low period. Note that all masters listen to the SCL
line, effectively starting to count their SCL high and low time-out periods when the combined
SCL line goes high or low, respectively.
Arbitration is carried out by all masters continuously monitoring the SDA line after outputting
data. If the value read from the SDA line does not match the value the Master had output, it has
lost the arbitration. Note that a Master can only lose arbitration when it outputs a high SDA value
while another Master outputs a low value. The losing Master should immediately go to Slave
mode, checking if it is being addressed by the winning Master. The SDA line should be left high,
but losing masters are allowed to generate a clock signal until the end of the current data or
address packet. Arbitration will continue until only one Master remains, and this may take many
bits. If several masters are trying to address the same Slave, arbitration will continue into the
data packet.
Figure 15-8. Arbitration Between Two Masters
Note that arbitration is not allowed between:
It is the user software’s responsibility to ensure that these illegal arbitration conditions never
occur. This implies that in multi-master systems, all data transfers must use the same composi-
tion of SLA+R/W and data packets. In other words: All transmissions must contain the same
number of data packets, otherwise the result of the arbitration is undefined.
Synchronized
• A REPEATED START condition and a data bit.
• A STOP condition and a data bit.
• A REPEATED START and a STOP condition.
SCL Line
SDA from
SDA from
Master A
Master B
SDA Line
START
Arbitration, SDA
Master A Loses
A
SDA
8008G–AVR–04/11
Related parts for ATTINY88-MMHR
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![ATtiny88](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
![ATtiny88 Automotive](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
![ATTINY88-AU](/photos/6/91/69154/313-32-tqfp_tmb.jpg)
Part Number:
Description:
MCU AVR 8K ISP FLASH 1.8V 32TQFP
Manufacturer:
Atmel
Datasheet:
![ATTINY88-MMU](/photos/12/32/123209/28m1-vqfn_tmb.jpg)
Part Number:
Description:
MCU AVR 8K FLASH 12MHZ 28-QFN
Manufacturer:
Atmel
Datasheet:
![ATTINY88-MMH](/photos/12/32/123209/28m1-vqfn_tmb.jpg)
Part Number:
Description:
MCU AVR 8KB FLASH 12MHZ 28-VQFN
Manufacturer:
Atmel
Datasheet:
![ATTINY88-15MZ](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
IC MCU AVR 8B 8KB FLASH 32QFN
Manufacturer:
Atmel
Datasheet:
![ATTINY88-MU](/photos/12/13/121310/attiny88-mu_tmb.jpg)
Part Number:
Description:
MCU AVR 8K ISP FLASH 1.8V 32-QFN
Manufacturer:
Atmel
Datasheet:
![ATTINY88-PU](/photos/7/21/72189/453-28-dip_tmb.jpg)
Part Number:
Description:
MCU AVR 8K ISP FLASH 1.8V 28-DIP
Manufacturer:
Atmel
Datasheet:
![ATTINY88-AUR](/photos/6/91/69154/313-32-tqfp_tmb.jpg)
Part Number:
Description:
MCU AVR 8KB FLASH 12MHZ 32TQFP
Manufacturer:
Atmel
Datasheet:
![ATTINY88-MUR](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
MCU AVR 8KB FLASH 12MHZ 32QFN
Manufacturer:
Atmel
Datasheet:
![ATTINY88-MMUR](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
MCU AVR 8KB FLASH 12MHZ 32QFN
Manufacturer:
Atmel
Datasheet:
![ATTINY88-W-11](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
8-bit Microcontrollers - MCU Microcontroller
Manufacturer:
Atmel
![ATTINY88-W](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
8-bit Microcontrollers - MCU Microcontroller
Manufacturer:
Atmel