Rainbow-electronics ATmega32L Manuel d'utilisateur télécharger pdf (Page 60)

ATmega32(L)

2503C–AVR–10/02

Note: 1. When enabled, the Two-wire Serial Interface enables slew-rate controls on the output

pins PC0 and PC1. This is not shown in the figure. In addition, spike filters are con-

nected between the AIO outputs shown in the port figure and the digital logic of the

TWI module.

Alternate Functions of Port D The Port D pins with alternate functions are shown in Table 31.

The alternate pin configuration is as follows:

• OC2 – Port D, Bit 7

OC2, Timer/Counter2 Output Compare Match output: The PD7 pin can serve as an

external output for the Timer/Counter2 Output Compare. The pin has to be configured

as an output (DDD7 set (one)) to serve this function. The OC2 pin is also the output pin

for the PWM mode timer function.

• ICP – Port D, Bit 6

ICP – Input Capture Pin: The PD6 pin can act as an Input Capture pin for

Timer/Counter1.

Table 30. Overriding Signals for Alternate Functions in PC3..PC0

(1)

Signal

Name PC3/TMS PC2/TCK PC1/SDA PC0/SCL

PUOE JTAGEN JTAGEN TWEN TWEN

PUOV 1 1 PORTC1 • PUD

PORTC0 • PUD

DDOE JTAGEN JTAGEN TWEN TWEN

DDOV 0 0 SDA_OUT SCL_OUT

PVOE 0 0 TWEN TWEN

PVOV 0 0 0 0

DIEOE JTAGEN JTAGEN 0 0

DIEOV 0 0 0 0

DI – – – –

AIO TMS TCK SDA INPUT SCL INPUT

Table 31. Port D Pins Alternate Functions

Port Pin Alternate Function

PD7 OC2 (Timer/Counter2 Output Compare Match Output)

PD6 ICP (Timer/Counter1 Input Capture Pin)

PD5 OC1A (Timer/Counter1 Output Compare A Match Output)

PD4 OC1B (Timer/Counter1 Output Compare B Match Output)

PD3 INT1 (External Interrupt 1 Input)

PD2 INT0 (External Interrupt 0 Input)

PD1 TXD (USART Output Pin)

PD0 RXD (USART Input Pin)

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 312 313

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Rainbow-electronics ATmega32L Manuel d'utilisateur Page 60