atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 65

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

9.3
7647A–AVR–02/08
Alternate Port Functions
Most port pins have alternate functions in addition to being general digital I/Os.
how the port pin control signals from the simplified
functions. The overriding signals may not be present in all port pins, but the figure serves as a
generic description applicable to all port pins in the AVR microcontroller family.
Figure 9-5.
Note:
Table 9-2
ure 9-5
in the modules having the alternate function.
are not shown in the succeeding tables. The overriding signals are generated internally
1. WRx, WPx, WDx, RRx, RPx, and RDx are common to all pins within the same port. clk
Pxn
summarizes the function of the overriding signals. The pin and port indexes from
SLEEP, and PUD are common to all ports. All other signals are unique for each pin.
Alternate Port Functions
DIEOExn: Pxn DIGITAL INPUT-ENABLE OVERRIDE ENABLE
DIEOVxn: Pxn DIGITAL INPUT-ENABLE OVERRIDE VALUE
PUOExn: Pxn PULL-UP OVERRIDE ENABLE
DDOExn: Pxn DATA DIRECTION OVERRIDE ENABLE
DDOVxn: Pxn DATA DIRECTION OVERRIDE VALUE
PUOVxn: Pxn PULL-UP OVERRIDE VALUE
PVOExn: Pxn PORT VALUE OVERRIDE ENABLE
PVOVxn: Pxn PORT VALUE OVERRIDE VALUE
PTOExn: Pxn, PORT TOGGLE OVERRIDE ENABLE
SLEEP: SLEEP CONTROL
1
0
1
0
1
0
1
0
(1)
PUOExn
PUOVxn
DIEOExn
DDOExn
DDOVxn
PVOExn
PVOVxn
DIEOVxn
SLEEP
SYNCHRONIZER
D
L
Figure 9-2
SET
CLR
Q
Q
ATmega32/64/M1/C1
AIOxn: ANALOG INPUT/OUTPUT PIN n ON PORTx
WDx: WRITE DDRx
WRx: WRITE PORTx
PUD: PULLUP DISABLE
WPx: WRITE PINx
clk
DIxn: DIGITAL INPUT PIN n ON PORTx
RDx: READ DDRx
RRx: READ PORTx REGISTER
RPx: READ PORTx PIN
D
PINxn
I/O
CLR
: I/O CLOCK
Q
Q
can be overridden by alternate
RESET
RESET
PORTxn
Q
Q
Q
Q
DDxn
CLR
CLR
D
D
1
0
clk
PUD
WDx
RDx
RRx
DIxn
AIOxn
RPx
I/O
Figure 9-5
WRx
PTOExn
WPx
shows
Fig-
I/O
65
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