ATMEGA169 ATMEL [ATMEL Corporation], ATMEGA169 Datasheet - Page 65

• Manufacturer Part Number: ATMEGA169
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

2514P–AVR–07/06
• SS/PCINT8 – Port B, Bit 0
SS: Slave Port Select input. When the SPI is enabled as a Slave, this pin is configured
as an input regardless of the setting of DDB0. As a Slave, the SPI is activated when this
pin is driven low. When the SPI is enabled as a Master, the data direction of this pin is
controlled by DDB0. When the pin is forced to be an input, the pull-up can still be con-
trolled by the PORTB0 bit
PCINT8, Pin Change Interrupt Source 8: The PB0 pin can serve as an external interrupt
source.
Table 31 and Table 32 relate the alternate functions of Port B to the overriding signals
shown in Figure 26 on page 60. SPI MSTR INPUT and SPI SLAVE OUTPUT constitute
the MISO signal, while MOSI is divided into SPI MSTR OUTPUT and SPI SLAVE
INPUT.
Table 31. Overriding Signals for Alternate Functions in PB7..PB4
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
PTOE
DIEOE
DIEOV
DI
AIO
PB7/OC2A/
PCINT15
0
0
0
0
OC2A
–
PCINT15 •
PCIE1
1
PCINT15 INPUT
–
OC2A ENABLE
PB6/OC1B/
PCINT14
0
0
0
0
OC1B ENABLE
OC1B
–
PCINT14 • PCIE1
1
PCINT14 INPUT
–
PB5/OC1A/
PCINT13
0
0
0
0
OC1A ENABLE
OC1A
–
PCINT13 • PCIE1
1
PCINT13 INPUT
–
ATmega169/V
PB4/OC0A/
PCINT12
0
0
0
0
OC0A ENABLE
OC0A
–
PCINT12 •
PCIE1
1
PCINT12 INPUT
–
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