MC68HC908QL4 Datasheet, PDF (95/226 Pages) Motorola, Inc – Microcontrollers

9.8.2 Keyboard Interrupt Enable Register (KBIER)
KBIER enables or disables each keyboard interrupt pin.
Registers
Read:
Write:
Reset:
Bit 7
6
5
4
3
2
1
Bit 0
0
AWUIE KBIE5 KBIE4 KBIE3 KBIE2 KBIE1 KBIE0
0
0
0
0
0
0
0
0
= Unimplemented
Figure 9-4. Keyboard Interrupt Enable Register (KBIER)
KBIE5–KBIE0 — Keyboard Interrupt Enable Bits
Each of these read/write bits enables the corresponding keyboard interrupt pin to latch KBI interrupt
requests.
1 = KBIx pin enabled as keyboard interrupt pin
0 = KBIx pin not enabled as keyboard interrupt pin
NOTE
KBIEx bit does not automatically enable the internal pullup/pulldown
device. Internal pullup/pulldown device is selected using the corresponding
PTAPUEx bit. Refer to PTAPUE bit description, see 12.3.3 Port A Input
Pullup/Down Enable Register.
AWUIE bit is not used in conjunction with the keyboard interrupt feature. To
see a description of this bit, see Chapter 4 Auto Wakeup Module (AWU)
9.8.3 Keyboard Interrupt Polarity Register (KBIPR)
KBIPR determines the polarity of the enabled keyboard interrupt pin and enables the appropriate pullup
or pulldown device.
Read:
Write:
Reset:
Bit 7
6
5
4
3
2
1
Bit 0
0
0
KBIP5 KBIP4 KBIP3 KBIP2 KBIP1 KBIP0
0
0
0
0
0
0
0
0
= Unimplemented
Figure 9-5. Keyboard Interrupt Polarity Register (KBIPR)
KBIP5–KBIP0 — Keyboard Interrupt Polarity Bits
Each of these read/write bits enables the polarity of the keyboard interrupt detection.
1 = Keyboard polarity is high level and/or rising edge. Port pulldown is enabled if the corresponding
PTAPUE bit is set.
0 = Keyboard polarity is low level and/or falling edge. Port pullup is enabled if the corresponding
PTAPUE bit is set.
MC68HC908QL4 Data Sheet, Rev. 7
Freescale Semiconductor
95