PC87413 datasheet(163/257 Pages) NSC

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9.0 System Wake-Up Control (SWC) (Continued)

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An active level-type event sets the status bit in registers GPE1_STS_0 for ports GPIOE10-17 and GPE1_STS_1 for ports

GPIOE40-47 (see Sections 9.4.8 and 9.4.9 on pages 209ff.). The status bit remains set even when the event becomes in-

active. The status bit is cleared only when the software writes ‘1’ to the bit. If the event is still active when software writes

‘1’, the status bit remains set.

After changing the GPIOExx pin multiplexing, clear the relevant bits in the GPE1_STS_0 and GPE1_STS_1 registers, to

prevent false events (caused by the pin multiplexing switch) from generating a wake-up event.

Figure 48. GPIO Events

Modem Ring Events

High-to-low transitions on RI1 or RI2 indicate the detection of a ring signal by an external modem connected to Serial Port

1 or Serial Port 2, respectively. The transitions on RI1 and RI2 are detected by the RI Wake-up Detector powered by VSB,

which works independently of the Serial Port 1 or Serial Port 2 modules (powered by VDD).

A detected RI1 or RI2 transition sets the RI1_EVT_STS or RI2_EVT_STS status bits in the GPE1_STS_2 register (see Sec-

tion 9.4.10 on page 210). A status bit is cleared only when the software writes ‘1’ to it.

The transition detection from RI1 and RI2 is enabled (for event generation) 1 second after the VSB power is on. This prevents

the detection of false events during VSB power-On transitions.

Mouse Wake-Up Event

The mouse wake-up event is detected by the Keyboard/Mouse Wake-up Detector, which monitors the MCLK and MDAT sig-

nals. Since the detection mechanisms for keyboard and mouse events are independent, they can be operated simultaneous-

ly. Moreover, the Keyboard signals may be swapped with the Mouse signals by setting the SWAP_KBMS bit in the

SWC_CTL register (see Section 9.3.10 on page 187). This bit must be set to the same value as the Swap bit in the KBC

Configuration register (see Section 3.13.3 on page 69). The Keyboard/Mouse Wake-up Detector is powered by VSB and

works independently of the Keyboard Controller module (powered by VDD).

The mouse event detection mechanism can be programmed to detect either a mouse click or movement, a specific mouse

click (left or right) or a double-click. To program which mouse action causes an event detection, set the MSEVCFG field in

the PS2CTL register (see Section 9.3.17 on page 194) to the required value.

A detected mouse event sets the MS_EVT_STS status bit in the GPE1_STS_2 register (see Section 9.4.10 on page 210).

The status bit is cleared only when the software writes ‘1’ to it.

Event

Enable

Event Polarity

Input

Debouncer

Event

Internal

Bus

Write 1 to Clear

Status

GPIO Pin Conﬁguration Register 1

Event

Debounce

Enable

Bit 6

Bit 5

(GPCFG1)

Reset

Set

GPIO Ports Module

Read

GPIO

Status

IRQ

SIOSMI

Routing

Control

Status

GPIO

GPIO Ports Module

SWC

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