ATTINY48-MMH Atmel, ATTINY48-MMH Datasheet - Page 43
![MCU AVR 4KB FLASH 12MHZ 28-VQFN](/photos/12/32/123209/28m1-vqfn_sml.jpg)
ATTINY48-MMH
Manufacturer Part Number
ATTINY48-MMH
Description
MCU AVR 4KB FLASH 12MHZ 28-VQFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY48-MMH
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
For Use With
ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVR
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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8.2
8.2.1
8008G–AVR–04/11
Reset Sources
Power-on Reset
The ATtiny48/88 has four sources of reset:
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detection level
is defined in
level. The POR circuit can be used to trigger the start-up Reset, as well as to detect a failure in
supply voltage.
A Power-on Reset (POR) circuit ensures that the device is reset from Power-on. Reaching the
Power-on Reset threshold voltage invokes the delay counter, which determines how long the
device is kept in RESET after V
when V
Figure 8-2.
Figure 8-3.
• Power-on Reset. The MCU is reset when the supply voltage is below the Power-on Reset
• External Reset. The MCU is reset when a low level is present on the RESET pin for longer
• Watchdog System Reset. The MCU is reset when the Watchdog Timer period expires and
• Brown-out Reset. The MCU is reset when the supply voltage V
threshold (V
than the required pulse length.
the Watchdog System Reset mode is enabled.
Reset threshold (V
INTERNAL
INTERNAL
TIME-OUT
TIME-OUT
RESET
RESET
CC
RESET
RESET
V
V
decreases below the detection level.
CC
CC
Table 22-3 on page
MCU Start-up, RESET Tied to V
MCU Start-up, RESET Extended Externally
POT
), or when the supply voltage falls rapidly.
BOT
) and the Brown-out Detector is enabled.
V
V
V
POT
POT
RST
CC
209. The POR is activated whenever V
t
TOUT
rise. The RESET signal is activated again, without any delay,
V
CC
RST
t
TOUT
CC
is below the Brown-out
CC
ATtiny48/88
is below the detection
43
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