PC87570-ICCSLASHVUL datasheet(84/168 Pages) NSC

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Multi-Input Wake-Up (MIWU)

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10.0 Multi-Input Wake-Up (MIWU)

The MIWU allows the device to exit Idle state. In addition, it

provides signal conditioning and grouping of external inter-

rupt sources.

10.1 FEATURES

Supports up to 24 wake-up or interrupt inputs

Generates a wake-up signal to PMC

Generates interrupt signals to the ICU

Provides user-selectable trigger condition on each in-

put:

— Rising edge

— Falling edge

Provides individual enable and pending bits per input.

10.2 FUNCTIONAL DESCRIPTION

The MIWU detects a valid software-selectable trigger con-

dition 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 can be utilized by

the PMC to exit Idle mode and return to Active mode. The

interrupt requests are used to signal the ICU that an edge-

triggered external or internal interrupt condition has oc-

curred.

Table 10-1 lists the MIWU sources and interrupts used in

the PC87570. Figure 10-1 provides a schematic diagram of

the MIWU.

Table 10-1. Input Assignments

1. Program the input to detect rising edge of the input event.

2. Use falling edge to prevent losing events. This delays the wake-up until the end

of the APC output pulse.

3. The ICU is provided with the OR of WKINTA and WKO24 as the interrupt input.

4. The wake-up input is triggered when the host accesses the PC87570. See Sec-

tion 5.11.7 on page 54. Conﬁgure the WUI26 for falling edge detection.

5. This input does not generate an interrupt.

Source

Destination

Name

MIWU Input

Interrupt Name

MIWU Output

PSCLK1

WUI10

MIWU1

WKINTA

PSCLK2

WUI11

PSCLK3

WUI12

PSDAT1

WUI13

PSDAT2

WUI14

PSDAT3

WUI15

ACCESS.bus Wake-Up1

WUI16

APC-ON event2

WUI17

EXINT0

WUI20

INT0

WKO20

EXINT10

WUI21

INT10

WKO21

EXINT11

WUI22

INT11

WKO22

EXINT15

WUI23

INT15

WKO23

APC-OFF Event1

WUI24

INT33

WKO24

SWIN

WUI25

INT9

WKO25

Host Bus Read or Write4

WUI26

- 5

WKO26

T0OUT1

WUI27

T0OUTINT

WKO27

KBSIN0

WUI30

KBSINT

WKINTC

KBSIN1

WUI31

KBSIN2

WUI32

KBSIN3

WUI33

KBSIN4

WUI34

KBSIN5

WUI35

KBSIN6

WUI36

KBSIN7

WUI37

PC87570-ICC/VUL 数据表(PDF) 84 Page - National Semiconductor (TI)

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