SIO1007 datasheet(7/108 Pages) MICROCHIP

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DS00002020A-page 7

SIO1007

4.0

SIGNAL DESCRIPTION

4.1

Pin Functions

TABLE 4-1:

PIN FUNCTIONS

STQFP

Pin #

Name

Description

Buffer

Name

Input

Buffer

Power

Well

Output

Buffer

Power

Well

Notes

POWER AND GROUND PINS (18)

5, 17,

31, 42,

VCC

+3.3 Volt Supply Voltage

VTR

+3.3 Volt Standby Supply Voltage

VBAT

Battery Voltage

8, 20,

29, 37,

45, 62

VSS

Ground

CLOCK (1)

SIO_14M

14.318MHz Clock Input

VCC

N/A

PROCESSOR/HOST LPC INTERFACE (11)

SER_IRQ

Serial IRQ pin used with the PCI_CLK

pin to transfer interrupts from this

device to the host.

PCI_IO

VCC

4-3

7,4,2,

LAD[3:0]

Active high LPC I/O used for

multiplexed command, address and

data bus.

PCI_IO

VCC

4-3

nLFRAME

Active low input indicates start of new

cycle and termination of broken cycle.

PCI_I

VCC

N/A

4-3

nLDRQ0

Active low output used for encoded

DMA/Bus Master request for the LPC

interface.

PCI_O

VCC

4-3

nLDRQ1

Active low signal between this device

and the LPC Host used for encoded

DMA/Bus Master request for docking

LPC Super I/O to the LPC Host.

PCI_O

VCC

4-3

nPCI_RESET

Active low input used as LPC Interface

Reset.

PCI_I

VCC

N/A

nLPCPD

Active low input Power Down signal

indicates that this device should

prepare for power to be shut-off on the

LPC interface.

PCI_I

VCC

N/A

4-1

4-3

PCI_CLK

PCI clock input.

PCI_ICLK

VCC

N/A

LPC_CLK_33

PCI clock input from clock source

dedicated to docking interface.

VCC

4-3

nCLKRUN

This signal is used to indicate the PCI

clock status and to request that a

stopped clock be started.

PCI_OD

VCC

4-3

DOCK INTERFACE(11)

DSER_IRQ

Serial IRQ pin between this device and

the Docking LPC SIO used with the

DLPC_CLK_33 pin to transfer

interrupts between this device and the

LPC Host.

VCC

4-3

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