atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 67

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

9.3.1
9.3.2
7647A–AVR–02/08
MCU Control Register – MCUCR
Alternate Functions of Port B
• Bit 4 – PUD: Pull-up Disable
When this bit is written to one, the pull-ups in the I/O ports are disabled even if the DDxn and
PORTxn Registers are configured to enable the pull-ups ({DDxn, PORTxn} = 0b01). Se
The Port B pins with alternate functions are shown in
Table 9-3.
The alternate pin configuration is as follows:
• ADC4/PSCOUT0B/SCK/PCINT7 – Bit 7
PSCOUT0B, Output 0B of PSC.
Bit
Read/Write
Initial Value
Port Pin
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
Alternate Functions
PSCOUT0B (PSC output 0B)
ADC4 (Analog Input Channel 4)
SCK (SPI Bus Serial Clock)
PCINT7 (Pin Change Interrupt 7)
ADC7 (Analog Input Channel 7)
PSCOUT1B (PSC output 1B)
PCINT6 (Pin Change Interrupt 6)
ADC6 (Analog Input Channel 6)
INT2 (External Interrupt 2)
ACMPN1 (Analog Comparator 1 Negative Input)
AMP2- (Analog Differential Amplicator 2 Negative Input)
PCINT5 (Pin Change Interrupt 5)
AMP0+ (Analog Differential Amplifier 0 Positive Input)
PCINT4 (Pin Change Interrupt 4)
AMP0- (Analog Differential Amplifier 0 Negative Input)
PCINT3 (Pin Change Interrupt 3)
ADC5 (Analog Input Channel5 )
INT1 (External Interrupt 1)
ACMPN0 (Analog Comparator 0 Negative Input)
PCINT2 (Pin Change Interrupt 2)
MOSI (SPI Master Out Slave In)
PSCOUT2B (PSC output 2B)
PCINT1 (Pin Change Interrupt 1)
MISO (SPI Master In Slave Out)
PSCOUT2A (PSC output 2A)
PCINT0 (Pin Change Interrupt 0)
SPIPS
Port B Pins Alternate Functions
R/W
7
0
R
6
–
0
R
5
–
0
PUD
R/W
4
0
Table
R
3
–
0
ATmega32/64/M1/C1
9-3.
R
2
–
0
IVSEL
R/W
1
0
IVCE
R/W
0
0
MCUCR
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