 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
ATMEGA161-4AI Datasheet(PDF) 85 Page - ATMEL Corporation |
|
|
|||||||||||||||||||||||||||||
ATMEGA161-4AI Datasheet(HTML) 85 Page - ATMEL Corporation |
|
|
85 / 134 page  ATmega161(L) 85 Port C Data Register – PORTC Port C Data Direction Register – DDRC Port C Input Pins Address – PINC The Port C Input Pins address – PINC – is not a register, and this address enables access to the physical value on each Port C pin. When reading PORTC, the Port C Data Latch is read, and when reading PINC, the logical values present on the pins are read. Port C as General Digital I/O All 8 pins in Port C have equal functionality when used as digital I/O pins. PCn, General I/O pin: The DDCn bit in the DDRC register selects the direction of this pin, if DDCn is set (one), PCn is con- figured as an output pin. If DDCn is cleared (zero), PCn is configured as an input pin. If PORTCn is set (one) when the pin configured as an input pin, the MOS pull-up resistor is activated. To switch the pull-up resistor off, PORTCn has to be cleared (zero) or the pin has to be configured as an output pin.The Port C pins are tri-stated when a reset condition becomes active, even if the clock is not running. n: 7, 6,…0, pin number Port C Schematics Note that all port pins are synchronized. The synchronization latch is however, not shown in the figure. Bit 7 654 321 0 $15 ($35) PORTC7 PORTC6 PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0 PORTC Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial value 0 0 0 0 0 0 0 0 Bit 7 654 321 0 $14 ($34) DDC7 DDC6 DDC5 DDC4 DDC3 DDC2 DDC1 DDC0 DDRC Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial value 0 0 0 0 0 0 0 0 Bit 7 654 321 0 $13 ($33) PINC7 PINC6 PINC5 PINC4 PINC3 PINC2 PINC1 PINC0 PINC Read/Write RR RRR RRR Initial value Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Table 31. DDCn Effects on Port C Pins DDCn PORTCn I/O Pull-up Comment 0 0 Input No Tri-state (Hi-Z) 0 1 Input Yes PCn will source current if ext. pulled low. 1 0 Output No Push-pull Zero Output 1 1 Output No Push-pull One Output |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
