ATTINY48-MMU Atmel, ATTINY48-MMU Datasheet - Page 30
![MCU AVR 5K FLASH 12MHZ 28-QFN](/photos/12/32/123209/28m1-vqfn_sml.jpg)
ATTINY48-MMU
Manufacturer Part Number
ATTINY48-MMU
Description
MCU AVR 5K FLASH 12MHZ 28-QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY48-MMU
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
4KB (2K x 16)
Program Memory Type
FLASH
Eeprom Size
64 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 6x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
Processor Series
ATTINY4x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
2-Wire, I2S, SPI
Maximum Clock Frequency
12 MHz
Number Of Programmable I/os
24
Number Of Timers
2
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
On-chip Adc
10 bit, 6 Channel
Package
28VQFN EP
Device Core
AVR
Family Name
ATtiny
Maximum Speed
12 MHz
Operating Supply Voltage
2.5|3.3|5 V
For Use With
ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVR
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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6.2.2
30
ATtiny48/88
Calibrated Internal 8MHz Oscillator
Figure 6-2.
When this clock source is selected, start-up times are determined by the SUT Fuses as shown in
Table
Table 6-2.
When applying an external clock, it is required to avoid sudden changes in the applied clock fre-
quency to ensure stable operation of the MCU. A variation in frequency of more than 2% from
one clock cycle to the next can lead to unpredictable behavior. If changes of more than 2% is
required, ensure that the MCU is kept in Reset during the changes.
Note that the System Clock Prescaler can be used to implement run-time changes of the internal
clock frequency while still ensuring stable operation. Refer to
31
By default, the Internal Oscillator provides an approximate 8.0 MHz clock. Though voltage and
temperature dependent, this clock can be very accurately calibrated by the user. See
on page 208
“System Clock Prescaler” on page 31
When selected, this oscillator operates with no external components. During reset, hardware
loads the pre-programmed calibration value into the OSCCAL Register and thereby automati-
cally calibrates the oscillator. The accuracy of this calibration is shown as Factory calibration in
Table 22-1 on page
By changing the OSCCAL register from SW, see
page
The accuracy of this calibration is shown as User calibration in
SUT[1:0]
for details.
34, it is possible to get a higher calibration accuracy than by using the factory calibration.
00
01
10
11
6-2.
for more details. The device is shipped with the CKDIV8 Fuse programmed. See
External Clock Drive Configuration
Start-up Times for the External Clock Selection
Power Conditions
BOD enabled
Fast rising power
Slowly rising power
208.
EXTERNAL
SIGNAL
CLOCK
for more details.
from Power-down
Start-up Time
“OSCCAL – Oscillator Calibration Register” on
Reserved
6 CK
6 CK
6 CK
CLKI
GND
“System Clock Prescaler” on page
Table 22-1 on page
from Reset (V
Additional Delay
14CK + 64 ms
14CK + 4 ms
14CK
8008G–AVR–04/11
208.
CC
Table 22-1
= 5.0V)
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