AT90CAN32-16MU Atmel, AT90CAN32-16MU Datasheet - Page 210
![IC MCU AVR 32K FLASH 64-QFN](/photos/12/13/121326/313-64-qfn_sml.jpg)
AT90CAN32-16MU
Manufacturer Part Number
AT90CAN32-16MU
Description
IC MCU AVR 32K FLASH 64-QFN
Manufacturer
Atmel
Series
AVR® 90CANr
Specifications of AT90CAN32-16MU
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
32KB (32K x 8)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K 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-VQFN Exposed Pad, 64-HVQFN, 64-SQFN, 64-DHVQFN
Processor Series
AT90CANx
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
2 KB
Interface Type
2-Wire, SPI, USART
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
53
Number Of Timers
2
Operating Supply Voltage
0.5 V to 0.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATDVK90CAN1, ATADAPCAN01
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Cpu Family
90C
Device Core
AVR
Device Core Size
8b
Frequency (max)
16MHz
Total Internal Ram Size
2KB
# I/os (max)
53
Number Of Timers - General Purpose
4
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
64
Package Type
QFN EP
Package
64QFN EP
Family Name
90C
Maximum Speed
16 MHz
For Use With
ATSTK600-TQFP64 - STK600 SOCKET/ADAPTER 64-TQFP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATDVK90CAN1 - KIT DEV FOR AT90CAN128 MCU
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90CAN32-16MU
Manufacturer:
ATMEL
Quantity:
717
- Current page: 210 of 428
- Download datasheet (6Mb)
18.5.1
18.5.2
210
AT90CAN32/64/128
SCL and SDA Pins
Bit Rate Generator Unit
Figure 18-9. Overview of the TWI Module
These pins interface the AVR TWI with the rest of the MCU system. The output drivers contain a
slew-rate limiter in order to conform to the TWI specification. The input stages contain a spike
suppression unit removing spikes shorter than 50 ns. Note that the internal pullups in the AVR
pads can be enabled by setting the PORT bits corresponding to the SCL and SDA pins, as
explained in the I/O Port section. The internal pull-ups can in some systems eliminate the need
for external ones.
This unit controls the period of SCL when operating in a Master mode. The SCL period is con-
trolled by settings in the TWI Bit Rate Register (TWBR) and the Prescaler bits in the TWI Status
Register (TWSR). Slave operation does not depend on Bit Rate or Prescaler settings, but the
CPU clock frequency in the slave must be at least 16 times higher than the SCL frequency. Note
that slaves may prolong the SCL low period, thereby reducing the average TWI bus clock
period. The SCL frequency is generated according to the following equation:
Note:
• TWBR = Value of the TWI Bit Rate Register
• TWPS = Value of the prescaler bits in the TWI Status Register
TWBR should be 10 or higher if the TWI operates in Master mode. If TWBR is lower than 10, the
master may produce an incorrect output on SDA and SCL for the reminder of the byte. The prob-
lem occurs when operating the TWI in Master mode, sending Start + SLA + R/W to a slave (a
slave does not need to be connected to the bus for the condition to happen).
Address Match Unit
Slew-rate
Control
Arbitration detection
START / STOP
Address Comparator
Address Register
SCL
Control
(TWAR)
Spike
Filter
Bus Interface Unit
SCL frequency
Spike Suppression
Address/Data Shift
Register (TWDR)
Slew-rate
Control
=
SDA
---------------------------------------------------------- -
16
Status Register
Ack
Spike
Filter
(TWSR)
+
2(TWBR) 4
CLKio
State Machine and
Control Unit
Status control
⋅
TWPS
Control Register
Bit Rate Generator
(TWCR)
Bit Rate Register
Prescaler
(TWBR)
7679H–CAN–08/08
TWI
Unit
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