SIO1007 datasheet(10/108 Pages) MICROCHIP

10 / 108 page

SIO1007

DS00002020A-page 10

 2005 - 2015 Microchip Technology Inc.

nRI1

Active low Ring Indicator inputs for the

serial port. Handshake signal which

notifies the UART that the telephone

ring signal is detected by the modem.

The CPU can monitor the status of nRI

signal by reading bit 6 of Modem Status

change from low to high after the last

MSR read will set MSR bit 2 to a 1. If

bit 3 of Interrupt Enable Register is set,

the interrupt is generated when nRI

changes state.

Note:

Bit 6 of MSR is the

complement of nRI.

IVTR

N/A

INFRARED INTERFACE (3)

IRRX2

IR Receive

VTR

IRTX2

IR Transmit

O12

VCC

IRMODE/

IRRX3

IR mode.IR Receive 3.

O6/

VTR

MISCELLANEOUS (34)

GP15

/CIRRX

Dedicated General Purpose

Input/Output.

Consumer IR Receiver

IS/O8/OD8/

VTR

VCC

4-4

GP16

/CIRTX

Dedicated General Purpose

Input/Output.

Consumer IR Transmitter

IO12/OD12/

O12

VTR

VCC

4-4

4-5

27,28,3

4,35,36,

38,39,4

9,41,43,

44,46,6

GP10,GP11

GP15-GP17

GP30-GP37

Dedicated General Purpose

Input/Output.

IO8/OD8

VTR

VCC

4-4

GP12/

nIO_SMI

General Purpose Input/Output.

Active low System Management

Interrupt Output.

I(I/O12/OD12

)

/(O12/OD12

VTR,

VCC

4-4

GP13/

IRQIN1/

CLKI32

General Purpose Input/Output.

External Interrupt Input. Steerable onto

one of the 15 Serial IRQs.

32kHz suspend clock input.

(IS/O8/OD8)/

VTR

VCC

4-4

GP14/

IRQIN2

General Purpose Input/Output.

External Interrupt Input. Steerable onto

one of the 15 Serial IRQs.

(I/O8/OD8)/

VTR,

VCC

4-4

nIO_PME

This active low Power Management

Event signal allows this device to

request wakeup.

(O12/OD12)

VTR

Note:

The “n” as the first letter of a signal name or the “#” as the suffix of a signal name indicates an “Active Low”

signal.

TABLE 4-1:

PIN FUNCTIONS (CONTINUED)

STQFP

Pin #

Name

Description

Buffer

Name

Input

Buffer

Power

Well

Output

Buffer

Power

Well

Notes

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