pc87591l-n05 National Semiconductor Corporation, pc87591l-n05 Datasheet - Page 104

• Manufacturer Part Number: pc87591l-n05
• Description: Lpc Mobile Embedded Controller
• Manufacturer: National Semiconductor Corporation

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4.0 Embedded Controller Modules
Trigger Conditions
Through the WKEDGx registers, the trigger condition on the selected input signal can be selected as either positive edge
(low-to-high transition) or negative edge (high-to-low transition).
Pending Flags
An occurrence of a trigger condition for the Multi-Input Wake-Up input is latched into the respective pending bit in WKPNDx
register. The respective bits of WKPNDx are set on an occurrence of the selected trigger edge on the corresponding input
signal.
Since the WKPNDx register holds a pending wake-up condition until it is cleared, the device does not enter IDLE mode if
any wake-up bit is both enabled and pending. Consequently, the pending flags must be cleared before an attempt to enter
Idle mode.
Input Enable
The MIWU utilizes multiple Multi-Input Wake-Up signals. Set the appropriate bits in the WKENAx registers to select which
particular wake-up signal causes the device to exit Idle mode.
Analog Comparators (ACMI)
1. Program the input to detect the rising edge of the input event.
2. The wake-up input is triggered by a host access to one of a selected set of
ACCESS.bus 1 Wake-Up
ACCESS.bus 2 Wake-Up
Host Access Wake-Up
devices in the PC87591L-N05. See “Core Interrupt” on page 305. Configure the
WUI26 for rising edge detection.
EXWINT40
EXWINT45
EXWINT46
Reserved
KBSIN0
KBSIN1
KBSIN2
KBSIN3
KBSIN4
KBSIN5
KBSIN6
KBSIN7
Name
Source
Table 16. Input Assignments (Continued)
2
1
1
(Continued)
MIWU Input
WUI30
WUI31
WUI32
WUI33
WUI34
WUI35
WUI36
WUI37
WUI40
WUI41
WUI42
WUI43
WUI44
WUI45
WUI46
WUI47
104
Interrupt Name
KBSINT
MIWU2
Destination
MIWU Output
WKINTC
WKINTD
Revision 1.2