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User’s Manual - Preliminary -
Philips Semiconductors
INTERRUPTS
P89LPC906/907/908
Table 3-3: Summary of Interrupts - P89LPC907,P89LPC908
Interrupt
Vector
Interrupt
Description
Flag Bit(s)
Address
Enable Bit(s)
Timer 0 Interrupt
Timer 1 Interrupt
Serial Port Tx and Rx
1,3
1,3
Serial Port Rx
Brownout Detect
Watchdog Timer/Realtime Clock
KBI Interrupt
Comparator interrupt
2
Serial Port Tx
Interrupt
Priority
Arbitration
Ranking
Power down
Wakeup
TF0
000Bh
ET0 (IEN0.1)
IP0H.1, IP0.1
3
No
TF1
001Bh
ET1 (IEN0.3)
IP0H.3, IP0.3
5
No
0023h
ES/ESR
(IEN0.4)
IP0H.4, IP0.4
8
No
BOF
002Bh
EBO (IEN0.5)
IP0H.5, IP0.5
1
Yes
WDOVF/
RTCF
0053h
EWDRT
(IEN0.6)
IP0H.6, IP0.6
2
Yes
KBIF
003Bh
EKBI (IEN1.1)
IP1H.1, IP1.1
4
Yes
CMF
0043h
EC (IEN1.2)
IP1H.2, IP1.2
6
Yes
TI
006Bh
EST (IEN1.6)
P1H.6, IP1.6
7
No
TI & RI
RI
1. SSTAT.5 = 0 selects combined Serial Port (UART) Tx and Rx interrupt; SSTAT.5 = 1 selects Serial Port Rx interrupt only
(Tx interrupt will be different, see Note 3 below).
2. This interrupt is used as Serial Port (UART) Tx interrupt if and only if SSTAT.5 = 1, and is disabled otherwise. Although the
P89LPC907 does not have the RxD pin, this function is still available to allow switching the Tx interrupt vector.
3. If SSTAT.0 = 1, the following Serial Port additional flag bits can cause this interrupt: FE, BR, OE
EXTERNAL INTERRUPT INPUTS
The P89LPC906/907/908 have a Keypad Interrupt function (see Keypad Interrupt (KBI) on page 77). This can be used as an
external interrupt input. If enabled when the P89LPC906/907/908 is put into Power down or Idle mode, the keypad interrupt will
cause the processor to wake up and resume operation. Refer to the section on Power Reduction Modes for details.
EXTERNAL INTERRUPT PIN GLITCH SUPPRESSION
Most of the P89LPC906/907/908 pins have glitch suppression circuits to reject short glitches (please refer to the P89LPC906/
907/908 datasheet, AC Electrical Characteristics for glitch filter specifications) .
2003 Dec 8
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