AT90CAN128-16AJ Atmel, AT90CAN128-16AJ Datasheet - Page 230
![IC MCU AVR FLASH 128K 64TQFP](/photos/12/13/121332/313-64-tqfp_sml.jpg)
AT90CAN128-16AJ
Manufacturer Part Number
AT90CAN128-16AJ
Description
IC MCU AVR FLASH 128K 64TQFP
Manufacturer
Atmel
Series
AVR® 90CANr
Specifications of AT90CAN128-16AJ
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
CAN, EBI/EMI, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
For Use With
ATDVK90CAN1 - KIT DEV FOR AT90CAN128 MCU
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Figure 18-18. Formats and States in the Slave Transmitter Mode
18.8.5
Table 18-7.
230
Status Code
(TWSR)
Prescaler Bits
are 0
0xF8
0x00
Reception of the
own slave address
and one or
more data bytes
Arbitration lost as master
and addressed as slave
Last data byte transmitted.
Switched to not addressed
slave (TWEA = ’0’)
AT90CAN32/64/128
Miscellaneous States
Status of the Two-wire Serial Bus
and Two-wire Serial Interface
Hardware
No relevant state information
available; TWINT = “0”
Bus error due to an illegal START
or STOP condition
Miscellaneous States
From master to slave
From slave to master
S
There are two status codes that do not correspond to a defined TWI state, see
Status 0xF8 indicates that no relevant information is available because the TWINT flag is not
set. This occurs between other states, and when the TWI is not involved in a serial transfer.
Status 0x00 indicates that a bus error has occurred during a Two-wire Serial Bus transfer. A bus
error occurs when a START or STOP condition occurs at an illegal position in the format frame.
Examples of such illegal positions are during the serial transfer of an address byte, a data byte,
or an acknowledge bit. When a bus error occurs, TWINT is set. To recover from a bus error, the
TWSTO flag must set and TWINT must be cleared by writing a logic one to it. This causes the
TWI to enter the not addressed slave mode and to clear the TWSTO flag (no other bits in TWCR
are affected). The SDA and SCL lines are released, and no STOP condition is transmitted.
SLA
To/from TWDR
No TWDR action
No TWDR action
R
DATA
Application Software Response
0xA8
0xB0
A
A
n
To TWCR
STA
No TWCR action
0
A
STO
1
DATA
Any number of data bytes
and their associated acknowledge bits
This number (contained in TWSR) corresponds
to a defined state of the Two-wire Serial Bus. The
prescaler bits are zero or masked to zero
TWINT
1
TWEA
X
0xB8
A
is sent on the bus. In all cases, the bus is released and
TWSTO is cleared.
Wait or proceed current transfer
Only the internal hardware is affected, no STOP condition
DATA
Next Action Taken by TWI Hardware
0xC0
0xC8
A
A
P or S
All 1’s
Table
7679H–CAN–08/08
P or S
18-7.
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