2.12.3 sEEPromIOConfig eepio

The sEEPromIOConfig eepio variable contains the initial IO configuration.

confDDRB, confDDRC

The confDDRB/C variables are a copy of the hardware DDRB/C registers, and configure the port B and port C data direction, respectively. See Initial IO Port Configuration for a functional description, and I/O Ports for a hardware description.

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0x000D

confDDRB

DDRB[7:0]

0x000E

confDDRC

DDRC[7:0]

confMCUCR

The confMCUCR variable is a copy of the microcontroller unit configuration (MCUCR) register and contains various port setting configurations. See Initial IO Port Configuration for a functional description, and I/O Ports for a hardware description.

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0x000F

confMCUCR

PB7HS

PB7LS

PB4HS

PUD

ENPS

SPIIO

IVSEL

ÎVCE

Bit 7: PB7HS – High-Side Driver on Port B7

Bit 6: PB7LS – Low-Side Driver on Port B7

Bit 5: PB4HS – High-Side Driver on Port B4

Bit 4: PUD – Global Pull-Up Resistor Disable

Bit 3: ENPS – Enable Register-Defined Port Settings This bit must always be set to ‘1’.

Bits 2..0: Interrupt Handling

These bits must always be set to ‘0’. The firmware controls the corresponding hardware register bits.

confPCICR

The confPCICR variable is a copy of the pin change interrupt control register (PCICR). See Initial IO Port Configuration for a functional description, and Reset and Interrupt Handling for a hardware description.

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0x0010

confPCICR

——————

PCIE[1:0]

Bits 7..2: Reserved Bits

These bits are reserved for future use and must be set to ‘0’.

Bit 1: PCIE1 – Pin Change Interrupt Enable on Port C

The individual pins must be masked in eepio.confPCMSK1.

Bit 0: PCIE0 – Pin Change Interrupt Enable on Port B

The individual pins must be masked in eepio.confPCMSK0.

confPCMSK0, confPCMSK1

The confPCMSK0/1 variables are a copy of the pin change mask 0/1 registers (PCMSK0/1). See Initial IO Port Configuration for a functional description, and Reset and Interrupt Handling for a hardware description.

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0x0011

confPCMSK0

PCMSK0[7:0]

0x0012

confPCMSK1

PCMSK1[7:0]

PCMSK0[7:0]: Pin Change Enable Mask for Port B

PCMSK1[7:0]: Pin Change Enable Mask for Port C

confPORTB, confPORTC

The confPORTB/C variables are a copy of the hardware PORTB/C registers and configure the port B and port C data registers, respectively. See Initial IO Port Configuration for a functional description, and I/O Ports for a hardware description.

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0x0013

confPORTB

PORTB[7:0]

0x0014

confPORTC

PORTC[7:0]