ATmega169PV-8MCH datasheet(82/393 Pages) ATMEL

82 / 393 page

8018N–AVR–08/09

ATmega169P

• XCK/AIN0/PCINT2 – Port E, Bit 2

XCK, USART External Clock. The Data Direction Register (DDE2) controls whether the clock is

output (DDE2 set) or input (DDE2 cleared). The XCK pin is active only when the USART oper-

ates in synchronous mode.

AIN0 – Analog Comparator Positive input. This pin is directly connected to the positive input of

the Analog Comparator.

PCINT2, Pin Change Interrupt Source 2: The PE2 pin can serve as an external interrupt source.

• TXD/PCINT1 – Port E, Bit 1

TXD0, UART0 Transmit pin.

PCINT1, Pin Change Interrupt Source 1: The PE1 pin can serve as an external interrupt source.

• RXD/PCINT0 – Port E, Bit 0

RXD, USART Receive pin. Receive Data (Data input pin for the USART). When the USART

Receiver is enabled this pin is configured as an input regardless of the value of DDE0. When the

USART forces this pin to be an input, a logical one in PORTE0 will turn on the internal pull-up.

PCINT0, Pin Change Interrupt Source 0: The PE0 pin can serve as an external interrupt source.

Table 13-16 and Table 13-17 relates the alternate functions of Port E to the overriding signals

shown in Figure 13-5 on page 71.

Note:

1. CKOUT is one if the CKOUT Fuse is programmed

Table 13-16. Overriding Signals for Alternate Functions PE7:PE4

Signal

Name

PE7/PCINT7

PE6/DO/

PCINT6

PE5/DI/SDA/

PCINT5

PE4/USCK/SCL/

PCINT4

PUOE

USI_TWO-WIRE

PUOV

DDOE

CKOUT(1)

USI_TWO-WIRE

DDOV

(SDA + PORTE5) •

DDE5

(USI_SCL_HOLD •

PORTE4) + DDE4

PVOE

CKOUT(1)

USI_THREE-

WIRE

USI_TWO-WIRE •

DDE5

USI_TWO-WIRE • DDE4

PVOV

clk

I/O

PTOE

–

USITC

DIEOE

PCINT7 • PCIE0

PCINT6 • PCIE0

(PCINT5 • PCIE0) +

USISIE

(PCINT4 • PCIE0) +

USISIE

DIEOV

PCINT7 INPUT

PCINT6 INPUT

DI/SDA INPUT

PCINT5 INPUT

USCKL/SCL INPUT

PCINT4 INPUT

AIO

–

ATmega169PV-8MCH 数据表(PDF) 82 Page - ATMEL Corporation

ATmega169PV-8MCH 数据表(HTML) 82 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载