pc87591l-n05 National Semiconductor Corporation, pc87591l-n05 Datasheet - Page 103

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

Revision 1.2
4.0 Embedded Controller Modules
4.4
The Multi-Input Wake-Up Unit (MIWU) allows the PC87591L-N05 to exit Idle mode. In addition, it provides signal conditioning
and grouping of external interrupt sources. It supports a total of 32 internal and/or external wake-up sources.
4.4.1
4.4.2
Overview
The Multi-Input Wake-Up Unit detects a valid software-selectable trigger condition on any of its inputs. On detection of a
valid trigger condition, the MIWU generates a wake-up request and/or an interrupt request. The wake-up request is connect-
ed to the Power Management module (PMC) and may be utilized to exit the Idle mode and return to Active mode. The inter-
rupt requests are used to signal to the Interrupt Control Unit (ICU) that either an edge-triggered external or internal interrupt
condition has occurred. Figure 31 shows a block diagram of the Multi-Input Wake-Up module.
Note that the MIWU module is active while in Idle mode. Note, however, that because all device clocks are stopped in Idle
mode, the detection of a trigger condition on an input, and the resulting set of the pending flag, are not synchronous to the
system clock.
Table 16 lists the MIWU sources and interrupts used in the PC87591L-N05.
• Supports up to 32 internal and/or external wake-up inputs
• Generates a wake-up signal
• Generates interrupt signals for:
• User-selectable trigger condition on each input:
• Individual enable and pending bits for each input
• Programmable bypass mode connects inputs to ICU without MIWU involvement
— each of the 32 inputs
— one interrupt for each group of eight inputs e.g., I/O ports
— positive edge
— negative edge
MULTI-INPUT WAKE-UP (MIWU)
Features
Operation
MSWC Wake-Up
EXWINT20
EXWINT21
EXWINT22
EXWINT23
EXWINT24
PSCLK1
PSCLK2
PSCLK3
PSCLK4
PSDAT1
PSDAT2
PSDAT3
PSDAT4
T0OUT
Name
SWIN
1
Source
Table 16. Input Assignments
(Continued)
MIWU Input
WUI10
WUI11
WUI12
WUI13
WUI14
WUI15
WUI16
WUI17
WUI20
WUI21
WUI22
WUI23
WUI24
WUI25
WUI26
WUI27
103
Interrupt Name
T0OUTINT
PSWUINT
INT31
INT21
INT17
INT14
INT12
INT1
INT6
Destination
MIWU Output
WKINTA
WKO20
WKO21
WKO22
WKO23
WKO24
WKO25
WKO26
WKO27
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