pc87591l-n05 National Semiconductor Corporation, pc87591l-n05 Datasheet - Page 136
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pc87591l-n05
Manufacturer Part Number
pc87591l-n05
Description
Lpc Mobile Embedded Controller
Manufacturer
National Semiconductor Corporation
Datasheet
1.PC87591L-N05.pdf
(401 pages)
- Current page: 136 of 401
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4.0 Embedded Controller Modules
4.7.4
The MFT16 contains a total of four interrupt sources that are mapped to two different system interrupts. All sources have a
pending flag associated with them and can be enabled or disabled under software control. The pending flags are TnXPND,
where n is the module and X is a letter from A to D. An interrupt enable flag, TnXIEN, is associated with each interrupt pend-
ing flag. Interrupt sources A, B or C can generate a timer interrupt 1; interrupt source D can generate a timer interrupt 2.
Note that not all interrupt sources are available in all modes. Table 18 shows which events can trigger an interrupt in each
mode of operation:
Interrupt
System
Timer
Timer
Int. 1
Int. 2
Timer 1
Clock
Timer 2
Clock
Timer Interrupts
Interrupt
TnCPND
TnDPND
Pending
TnAPND
TnBPND
Flag
TnCNT1 reload from
TnCNT1 reload from
PWM and Counter
TnCNT2 underflow
Timer/Counter 1
Timer/Counter 2
Mode 1
TnCNT1
Figure 49. Mode 4, Input Capture and Timer
TnCRA
TnCRB
Capture B
Reload A
TnCRA
TnCRB
N/A
TnCNT2
Underflow
Table 18. MFT16 Interrupts
(Continued)
Input Capture on TBn
Input capture on TAn
Dual Input Capture
TnCNT1 underflow
TnCNT2 underflow
Preset
transition
transition
Mode 2
136
Underflow
TBEN
TnCNT1 reload from
TnCNT2 reload from
Dual Independent
Mode 3
TnCRA
TnCRB
Timer
N/A
N/A
TBPND
TAPND
TDPND
TBIEN
TAIEN
TDIEN
TATEN
Input Capture on TBn
TnCNT1 reload from
Input Capture and
TnCNT2 underflow
Interrupt 1
Interrupt 1
transition
Interrupt 2
Mode 4
TnCRA
Timer
Timer
Timer
Timer
N/A
TAn
T
Bn
Revision 1.2
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