ATmega48PA Atmel Corporation, ATmega48PA Datasheet - Page 33
ATmega48PA
Manufacturer Part Number
ATmega48PA
Description
Manufacturer
Atmel Corporation
Specifications of ATmega48PA
Flash (kbytes)
4 Kbytes
Pin Count
32
Max. Operating Frequency
20 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
23
Ext Interrupts
24
Usb Speed
No
Usb Interface
No
Spi
2
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.5
Eeprom (bytes)
256
Self Program Memory
NO
Dram Memory
No
Nand Interface
No
Picopower
Yes
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATmega48PA-15MT
Manufacturer:
ATMEL
Quantity:
110
Company:
Part Number:
ATmega48PA-15MZ
Manufacturer:
ATMEL
Quantity:
3 500
Company:
Part Number:
ATmega48PA-AU
Manufacturer:
MICRON
Quantity:
1 000
Company:
Part Number:
ATmega48PA-AU
Manufacturer:
Atmel
Quantity:
900
Part Number:
ATmega48PA-AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
ATmega48PA-AUR
Manufacturer:
ATMEL
Quantity:
723
Part Number:
ATmega48PA-MMH
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
ATmega48PA-MMHR
Manufacturer:
ATMEL
Quantity:
20 000
- Current page: 33 of 567
- Download datasheet (21Mb)
9.5
8271D–AVR–05/11
Low Frequency Crystal Oscillator
The Low-frequency Crystal Oscillator is optimized for use with a 32.768kHz watch crystal. When
selecting crystals, load capacitance and crystal’s Equivalent Series Resistance, ESR must be
t a k e n i n t o c o n s i d e r a t i o n . B o t h v a l u e s a r e s p e c i f i e d b y t h e c r y s t a l v e n d o r .
ATmega48A/PA/88A/PA/168A/PA/328/P oscillator is optimized for very low power consumption,
and thus when selecting crystals, see
9.0pF and 12.5pF crystals
Table 9-7.
Note:
The Low-frequency Crystal Oscillator provides an internal load capacitance, see
each TOSC pin.
Table 9-8.
The capacitance (Ce+Ci) needed at each TOSC pin can be calculated by using:
where:
Crystals specifying load capacitance (CL) higher than 6 pF, require external capacitors applied
as described in
The Low-frequency Crystal Oscillator must be selected by setting the CKSEL Fuses to “0110” or
“0111”, as shown in
shown in
Table 9-9.
C
ATmega48A/PA/88A/PA/168A/PA/3
=
SUT1...0
– Ce - is optional external capacitors as described in
– Ci - is the pin capacitance in
– CL - is the load capacitance for a 32.768kHz crystal specified by the crystal vendor
– CS - is the total stray capacitance for one TOSC pin.
2 CL
00
01
10
11
⋅
1. Maximum ESR is typical value based on characterization
Table
–
C
s
Device
Maximum ESR Recommendation for 32.768kHz Crystal
Capacitance for Low-frequency Oscillator
Start-up Times for the Low-frequency Crystal Oscillator Clock Selection
28/P
Additional Delay from Reset (V
Figure 9-2 on page
9-9.
Crystal CL (pF)
Table 9-10 on page
ATmega48A/PA/88A/PA/168A/PA/328/P
12.5
6.5
9.0
4 CK + 4.1ms
4 CK + 65ms
4 CK
Table 9-8
30.
32kHz Osc. Type
System Osc.
Table
Timer Osc.
34. Start-up times are determined by the SUT Fuses as
CC
for maximum ESR recommendations on 6.5pF,
= 5.0V)
Reserved
Recommended Usage
Fast rising power or BOD enabled
Slowly rising power
Stable frequency at start-up
Cap(Xtal1/Tosc1)
Figure 9-2 on page 30
18pF
18pF
Max ESR [kΩ]
75
65
30
Cap(Xtal2/Tosc2)
(1)
Table 9-8
8pF
8pF
33
at
Related parts for ATmega48PA
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
U6046BREAR WINDOW HEATING TIMER / LONG-TERM TIMER
Manufacturer:
ATMEL Corporation
Datasheet: