ATmega48P Atmel Corporation, ATmega48P Datasheet - Page 315
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ATmega48P
Manufacturer Part Number
ATmega48P
Description
Manufacturer
Atmel Corporation
Specifications of ATmega48P
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
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29.6
8025M–AVR–6/11
SPI Timing Characteristics
See
Table 29-5.
Note:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Figure 29-4
Description
SCK period
SCK high/low
Rise/Fall time
Setup
Hold
Out to SCK
SCK to out
SCK to out high
SS low to out
SCK period
SCK high/low
Rise/Fall time
Setup
Hold
SCK to out
SCK to SS high
SS high to tri-state
SS low to SCK
1. In SPI Programming mode the minimum SCK high/low period is:
2. All DC Characteristics contained in this datasheet are based on simulation and characteriza-
- 2 t
- 3 t
tion of other AVR microcontrollers manufactured in the same process technology. These
values are preliminary values representing design targets, and will be updated after character-
ization of actual silicon.
SPI Timing Parameters
CLCL
CLCL
and
for f
for f
(1)
Figure 29-5
CK
CK
< 12 MHz
> 12 MHz
Mode
Master
Master
Master
Master
Master
Master
Master
Master
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
for details.
Min
4 • t
2 • t
10
t
20
20
ck
ck
ck
ATmega48P/88P/168P
Typ
See
50% duty cycle
3.6
10
10
0.5 • t
10
10
15
15
10
Table 19-5
sck
Max
1600
315
ns