Keypad interrupt (kbi) – Philips P89LPC903 User Manual
Page 81
Philips Semiconductors
User’s Manual - Preliminary -
P89LPC901/902/903
KEYPAD INTERRUPT (KBI)
2003 Dec 8
81
Figure 11-6: Keypad Interrupt Mask Register (KBM)) - P89LPC902
Figure 11-7: Keypad Interrupt Mask Register (KBM)) - P89LPC903
KBMASK
Address: 86h
Not bit addressable
Reset Source(s): Any reset
Reset Value: 00000000B
BIT
SYMBOL
FUNCTION
KBMASK.7
-
Reserved.
KBMASK.6
-
When set, enables P0.6 as a cause of a Keypad Interrupt.
KBMASK.5
-
When set, enables P0.5 as a cause of a Keypad Interrupt.
KBMASK.4
-
When set, enables P0.4 as a cause of a Keypad Interrupt.
KBMASK.3
-
Reserved.
KBMASK.2
-
When set, enables P0.2 as a cause of a Keypad Interrupt.
KBMASK.1
-
Reserved.
KBMASK.0
-
When set, enables P0.0 as a cause of a Keypad Interrupt.
Note: the Keypad Interrupt must be enabled in order for the settings of the KBMASK register to be effective.
Bit positions KBMASK.7, KBMASK.3, and KBMASK.1 should always be written as a ’0’.
7
6
5
4
3
2
1
0
-
KBMASK.6 KBMASK.5 KBMASK.4
-
KBMASK.2
-
KBMASK.0
KBMASK
Address: 86h
Not bit addressable
Reset Source(s): Any reset
Reset Value: 00000000B
BIT
SYMBOL
FUNCTION
KBMASK.7:6
-
Reserved.
KBMASK.5
-
When set, enables P0.5 as a cause of a Keypad Interrupt.
KBMASK.4
-
When set, enables P0.4 as a cause of a Keypad Interrupt.
KBMASK.3
-
Reserved.
KBMASK.2
-
When set, enables P0.2 as a cause of a Keypad Interrupt.
KBMASK.1:0
-
Reserved.
Note: the Keypad Interrupt must be enabled in order for the settings of the KBMASK register to be effective.
Bit positions KBMASK.7, KBMASK.6, KBMASK.3, KBMASK.1, and KBMASK.0 should always be written as a ’0’.
7
6
5
4
3
2
1
0
-
-
KBMASK.5 KBMASK.4
-
KBMASK.2
-
-