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ATMEGA16-16MC Datasheet(PDF) 55 Page - ATMEL Corporation

Part No. ATMEGA16-16MC
Description  8-bit AVR Microcontroller with 16K Bytes In-System Programmable Flash
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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ATMEGA16-16MC Datasheet(HTML) 55 Page - ATMEL Corporation

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55
ATmega16(L)
2466E–AVR–10/02
Alternate Functions of Port B
The Port B pins with alternate functions are shown in Table 25.
The alternate pin configuration is as follows:
• SCK – Port B, Bit 7
SCK: Master Clock output, Slave Clock input pin for SPI channel. When the SPI is
enabled as a Slave, this pin is configured as an input regardless of the setting of DDB7.
When the SPI is enabled as a Master, the data direction of this pin is controlled by
DDB7. When the pin is forced by the SPI to be an input, the pull-up can still be con-
trolled by the PORTB7 bit.
• MISO – Port B, Bit 6
MISO: Master Data input, Slave Data output pin for SPI channel. When the SPI is
enabled as a Master, this pin is configured as an input regardless of the setting of
DDB6. When the SPI is enabled as a Slave, the data direction of this pin is controlled by
Table 24. Overriding Signals for Alternate Functions in PA3..PA0
Signal Name
PA3/ADC3
PA2/ADC2
PA1/ADC1
PA0/ADC0
PUOE
0000
PUOV
0000
DDOE
0000
DDOV
0000
PVOE
0000
PVOV
0000
DIEOE
0000
DIEOV
0000
DI
––––
AIO
ADC3 INPUT
ADC2 INPUT
ADC1 INPUT
ADC0 INPUT
Table 25. Port B Pins Alternate Functions
Port Pin
Alternate Functions
PB7
SCK (SPI Bus Serial Clock)
PB6
MISO (SPI Bus Master Input/Slave Output)
PB5
MOSI (SPI Bus Master Output/Slave Input)
PB4
SS (SPI Slave Select Input)
PB3
AIN1 (Analog Comparator Negative Input)
OC0 (Timer/Counter0 Output Compare Match Output)
PB2
AIN0 (Analog Comparator Positive Input)
INT2 (External Interrupt 2 Input)
PB1
T1 (Timer/Counter1 External Counter Input)
PB0
T0 (Timer/Counter0 External Counter Input)
XCK (USART External Clock Input/Output)


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