ATMEGA48P-20MMUR Atmel, ATMEGA48P-20MMUR Datasheet - Page 163
ATMEGA48P-20MMUR
Manufacturer Part Number
ATMEGA48P-20MMUR
Description
MCU AVR 4K FLASH 20MHZ 28QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA168P-20AU.pdf
(420 pages)
Specifications of ATMEGA48P-20MMUR
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 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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- Download datasheet (9Mb)
17.11.9
8025L–AVR–7/10
GTCCR – General Timer/Counter Control Register
The mechanisms for reading TCNT2, OCR2A, OCR2B, TCCR2A and TCCR2B are different.
When reading TCNT2, the actual timer value is read. When reading OCR2A, OCR2B, TCCR2A
and TCCR2B the value in the temporary storage register is read.
Bit
0x23 (0x43)
Read/Write
Initial Value
• Bit 1 – PSRASY: Prescaler Reset Timer/Counter2
When this bit is one, the Timer/Counter2 prescaler will be reset. This bit is normally cleared
immediately by hardware. If the bit is written when Timer/Counter2 is operating in asynchronous
mode, the bit will remain one until the prescaler has been reset. The bit will not be cleared by
hardware if the TSM bit is set. Refer to the description of the
chronization Mode” on page 141
TSM
R/W
7
0
R
6
–
0
for a description of the Timer/Counter Synchronization mode.
R
5
–
0
R
4
–
0
ATmega48P/88P/168P
3
–
R
0
”Bit 7 – TSM: Timer/Counter Syn-
R
2
–
0
PSRASY
R/W
1
0
PSRSYNC
R/W
0
0
GTCCR
163
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