ATMEGA48A-PU Atmel, ATMEGA48A-PU Datasheet - Page 85
ATMEGA48A-PU
Manufacturer Part Number
ATMEGA48A-PU
Description
IC MCU AVR 4K FLASH 28PDIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA48A-PU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
4KB (2K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
512 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-DIP (0.300", 7.62mm)
Controller Family/series
Atmega
No. Of I/o's
23
Eeprom Memory Size
256Byte
Ram Memory Size
512Byte
Cpu Speed
20MHz
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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8271C–AVR–08/10
(one)) to serve this function. The OC1A pin is also the output pin for the PWM mode timer
function.
PCINT1: Pin Change Interrupt source 1. The PB1 pin can serve as an external interrupt source.
• ICP1/CLKO/PCINT0 – Port B, Bit 0
ICP1, Input Capture Pin: The PB0 pin can act as an Input Capture Pin for Timer/Counter1.
CLKO, Divided System Clock: The divided system clock can be output on the PB0 pin. The
divided system clock will be output if the CKOUT Fuse is programmed, regardless of the
PORTB0 and DDB0 settings. It will also be output during reset.
PCINT0: Pin Change Interrupt source 0. The PB0 pin can serve as an external interrupt source.
Table 13-4
signals shown in
tute the MISO signal, while MOSI is divided into SPI MSTR OUTPUT and SPI SLAVE INPUT.
Table 13-4.
Notes:
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
1. INTRC means that one of the internal RC Oscillators are selected (by the CKSEL fuses),
EXTCK means that external clock is selected (by the CKSEL fuses)
and
PB7/XTAL2/
TOSC2/PCINT7
INTRC • EXTCK+
AS2
0
INTRC • EXTCK+
AS2
0
0
0
INTRC • EXTCK +
AS2 + PCINT7 •
PCIE0
(INTRC + EXTCK) •
AS2
PCINT7 INPUT
Oscillator Output
Overriding Signals for Alternate Functions in PB7...PB4
Table 13-5 on page 86
Figure 13-5 on page
(1)
PB6/XTAL1/
TOSC1/PCINT6
INTRC + AS2
0
INTRC + AS2
0
0
0
INTRC + AS2 +
PCINT6 • PCIE0
INTRC • AS2
PCINT6 INPUT
Oscillator/Clock
Input
81. SPI MSTR INPUT and SPI SLAVE OUTPUT consti-
relate the alternate functions of Port B to the overriding
(1)
PB5/SCK/
PCINT5
SPE • MSTR
PORTB5 • PUD
SPE • MSTR
0
SPE • MSTR
SCK OUTPUT
PCINT5 • PCIE0
1
PCINT5 INPUT
SCK INPUT
–
PB4/MISO/
PCINT4
SPE • MSTR
PORTB4 • PUD
SPE • MSTR
0
SPE • MSTR
SPI SLAVE
OUTPUT
PCINT4 • PCIE0
1
PCINT4 INPUT
SPI MSTR INPUT
–
85
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