ATMEGA48-20PU Atmel, ATMEGA48-20PU Datasheet - Page 289

• Manufacturer Part Number: ATMEGA48-20PU
• Description: IC AVR MCU 4K 20MHZ 5V 28DIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA48-20PU

• 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): 2.7 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)
• Processor Series: ATMEGA48x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: 2-Wire/SPI/USART/Serial
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 6-ch x 10-bit
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Total Internal Ram Size: 512Byte
• # I/os (max): 23
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 28
• Package Type: PDIP
• For Use With: ATSTK600-TQFP32 - STK600 SOCKET/ADAPTER 32-TQFPATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2545S–AVR–07/10
Figure 27-1. Parallel Programming
Note:
Table 27-11. Pin Name Mapping
Table 27-12. Pin Values Used to Enter Programming Mode
Signal Name in
Programming Mode
RDY/BSY
OE
WR
BS1
XA0
XA1
PAGEL
BS2
DATA
V
PAGEL
CC
XA1
XA0
BS1
Pin
- 0.3V < AV
CC
< V
{PC[1:0]: PB[5:0]}
RDY/BSY
CC
PAGEL
+12V
Pin Name
BS1
XA0
XA1
BS2
Prog_enable[3]
Prog_enable[2]
Prog_enable[1]
Prog_enable[0]
WR
+ 0.3V, however, AV
OE
PD1
PD2
PD3
PD4
PD5
PD6
PD7
PC2
Symbol
PD1
PD2
PD3
PD4
PD5
PD6
RESET
XTAL1
GND
PD7
PC2
PC[1:0]:PB[5:0]
I/O
I/O
O
I
I
I
I
I
I
I
CC
should always be within 4.5 - 5.5V
Function
0: Device is busy programming, 1: Device is
ready for new command
Output Enable (Active low)
Write Pulse (Active low)
Byte Select 1 (“0” selects Low byte, “1” selects
High byte)
XTAL Action Bit 0
XTAL Action Bit 1
Program memory and EEPROM Data Page
Load
Byte Select 2 (“0” selects Low byte, “1” selects
2’nd High byte)
Bi-directional Data bus (Output when OE is low)
AVCC
VCC
+4.5V - 5.5V
+4.5V - 5.5V
ATmega48/88/168
DATA
Value
0
0
0
0
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