AT90SCR100 datasheet(330/433 Pages) ATMEL

330 / 433 page

330

TPR0327AY–SMS–30Jan09

AT90SCR100

Figure 23-2.

Keyboard Input Circuitry

23.2.3

Power Reduction Mode

Keyboard inputs allow wake up from power-down, power-save, Standby, Extended Standbay

modes “Active Clock Domains and Wake-up Sources in the Different Sleep Modes.” on page 44.

23.3

Keyboard Register Description

23.3.1

KBFR - KeyBoard Flag Register

• Bit 7- KBF7: Keyboard Flag for KbIN7 pin

Set by hardware when the pin function KbIN7 (PA7) detects a programmed level. It generates a

Keyboard interrupt request if the KBER.KBE7 bit is set.

Writing a ‘0’ or a ‘1’ into this bit will erase all the bits (including this one) of the KBFR register

• Bit 6 - KBF6: Keyboard Flag for KbIN6 pin

Set by hardware when the pin function KbIN6 (PA6) detects a programmed level. It generates a

Keyboard interrupt request if the KBER.KBE6 bit is set.

Writing a ‘0’ or a ‘1’ into this bit will erase all the bits (including this one) of the KBFR register

• Bit 5 - KBF5: Keyboard Flag for KbIN5 pin

Set by hardware when the pin function KbIN5 (PA5) detects a programmed level. It generates a

Keyboard interrupt request if the KBER.KBE5 bit is set.

Writing a ‘0’ or a ‘1’ into this bit will erase all the bits (including this one) of the KBFR register

• Bit 4 - KBF4: Keyboard Flag for KbIN4 pin

Set by hardware when the pin function KbIN4 (PA4) detects a programmed level. It generates a

Keyboard interrupt request if the KBER.KBE4 bit is set.

Writing a ‘0’ or a ‘1’ into this bit will erase all the bits (including this one) of the KBFR register

• Bit 3 - KBF3 : Keyboard Flag for KbIN3 pin

Set by hardware when the pin function KbIN3 (PA3) detects a programmed level. It generates a

Keyboard interrupt request if the KBER.KBE3 bit is set.

KBLS.x

KbIN x

KBF.x

KBE.x

Bit

7654

$008F

KBF7

KBF6

KBF5

KBF4

KBF3

KBF2

KBF1

KBF0

KBFR

Read/write

R/W

Initial value

0000

0x00

AT90SCR100 Datasheet(PDF) 330 Page - ATMEL Corporation

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