s908ey16g2vfar Freescale Semiconductor, Inc, s908ey16g2vfar Datasheet - Page 118

• Manufacturer Part Number: s908ey16g2vfar
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Keyboard Interrupt (KBI) Module
ACKK — Keyboard Acknowledge Bit
IMASKK— Keyboard Interrupt Mask Bit
MODEK — Keyboard Triggering Sensitivity Bit
10.8.2 Keyboard Interrupt Enable Register (KBIER)
KBIER enables or disables each keyboard interrupt pin.
KBIE4–KBIE0 — Keyboard Interrupt Enable Bits
10.8.3 Keyboard Interrupt Polarity Register (KBIPR)
KBIPR determines the polarity of the enabled keyboard interrupt pin and enables the appropriate pullup
or pulldown device.
KBIP4–KBIP0 — Keyboard Interrupt Polarity Bits
118
Writing a 1 to this write-only bit clears the KBI request. ACKK always reads 0.
Writing a 1 to this read/write bit prevents the output of the KBI latch from generating interrupt requests.
This read/write bit controls the triggering sensitivity of the keyboard interrupt pins.
Each of these read/write bits enables the corresponding keyboard interrupt pin to latch KBI interrupt
requests.
Each of these read/write bits selects the polarity of the keyboard interrupt pin. Reset clears the
keyboard interrupt polarity register.
1 = Keyboard interrupt requests disabled
0 = Keyboard interrupt requests enabled
1 = Keyboard interrupt requests on edge and level
0 = Keyboard interrupt requests on edge only
1 = KBDx pin enabled as keyboard interrupt pin
0 = KBDx pin not enabled as keyboard interrupt pin
1 = Keyboard polarity is rising edge and/or high level
0 = Keyboard polarity is falling edge and/or low level
Address: $001B
Address: $000C
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 10-5. Keyboard Interrupt Polarity Register (KBIPR)
Figure 10-4. Keyboard Interrupt Enable Register (KBIER)
Bit 7
Bit 7
0
0
0
0
MC68HC908EY16A • MC68HC908EY8A Data Sheet, Rev. 1
= Unimplemented
= Unimplemented
6
0
0
6
0
0
5
0
0
5
0
0
KBIE4
KBIP4
4
0
4
0
KBIE3
KBIP3
3
0
3
0
KBIE2
KBIP2
2
0
2
0
KBIE1
KBIP1
1
0
1
0
Freescale Semiconductor
KBIE0
KBIP0
Bit 0
Bit 0
0
0