ATMEGA168PA-PU Atmel, ATMEGA168PA-PU Datasheet - Page 250

• Manufacturer Part Number: ATMEGA168PA-PU
• Description: MCU, 8BIT, AVR, 16K FLASH, 28PDIP
• Manufacturer: Atmel

Specifications of ATMEGA168PA-PU

• Controller Family/series: Atmega
• No. Of I/o's: 23
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 1KB
• Cpu Speed: 20MHz
• No.: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 16KB
• Oscillator Type: External, Internal
• Rohs Compliant: Yes

22.3.3
8271C–AVR–08/10
DIDR1 – Digital Input Disable Register 1
• Bit 7:2 – Reserved
These bits are unused bits in the ATmega48A/48PA/88A/88PA/168A/168PA/328/328P, and will
always read as zero.
• Bit 1, 0 – AIN1D, AIN0D: AIN1, AIN0 Digital Input Disable
When this bit is written logic one, the digital input buffer on the AIN1/0 pin is disabled. The corre-
sponding PIN Register bit will always read as zero when this bit is set. When an analog signal is
applied to the AIN1/0 pin and the digital input from this pin is not needed, this bit should be writ-
ten logic one to reduce power consumption in the digital input buffer.
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
Bit
(0x7F)
Read/Write
Initial Value
R
7
–
0
R
6
–
0
R
5
–
0
R
4
–
0
R
3
–
0
2
–
R
0
AIN1D
R/W
1
0
AIN0D
R/W
0
0
DIDR1
250