ATTINY9-MAHR Atmel, ATTINY9-MAHR Datasheet - Page 42

• Manufacturer Part Number: ATTINY9-MAHR
• Description: IC MCU AVR 1K FLASH 8UDFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY9-MAHR

• Package / Case: 8-UDFN Exposed Pad
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 12MHz
• Number Of I /o: 4
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 32 x 8
• Program Memory Size: 1KB (1K x 8)
• Oscillator Type: Internal
• Peripherals: POR, PWM, WDT
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

10.2
10.2.1
42
Ports as General Digital I/O
ATtiny4/5/9/10
Configuring the Pin
The ports are bi-directional I/O ports with optional internal pull-ups.
tional description of one I/O-port pin, here generically called Pxn.
Figure 10-2. General Digital I/O
Note:
Each port pin consists of four register bits: DDxn, PORTxn, PUExn, and PINxn. As shown in
“Register Description” on page
PORTxn bits at the PORTx I/O address, the PUExn bits at the PUEx I/O address, and the PINxn
bits at the PINx I/O address.
Pxn
1. WEx, WRx, WPx, WDx, REx, RRx, RPx, and RDx are common to all pins within the same
port. clk
SLEEP:
clk
I/O
I/O
:
, and SLEEP are common to all ports.
SLEEP CONTROL
I/O CLOCK
SLEEP
51, the DDxn bits are accessed at the DDRx I/O address, the
(1)
SYNCHRONIZER
D
L
Q
Q
D
PINxn
Q
Q
RESET
RESET
RESET
PORTxn
WEx:
REx:
WDx:
RDx:
WRx:
RRx:
RPx:
WPx:
Q
Q
Q
Q
Q
Q
PUExn
DDxn
CLR
CLR
CLR
D
D
D
REx
RRx
WRITE PUEx
READ PUEx
WRITE DDRx
READ DDRx
WRITE PORTx
READ PORTx REGISTER
READ PORTx PIN
WRITE PINx REGISTER
Figure 10-2
WEx
WDx
RDx
RPx
clk
1
0
I/O
WRx
shows a func-
8127D–AVR–02/10
WPx