CS5535 datasheet(47/555 Pages) NSC

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Signal Definitions (Continued)

SLEEP_X

GPIO7

Sleep X. This general purpose power control output becomes

active as the CS5535 enters and exits various power management

modes. It may be used by external devices to control their power

states synchronous with power state changes in the CS5535. It

may be configured as active high or active low.

SLEEP_Y

GPIO12

Sleep Y. This general purpose power control output becomes

active as the CS5535 enters and exits various power-manage-

ment modes. It may be used by external devices to control their

power states synchronous with power state changes in the

CS5535. It may be configured as active high or active low.

SMB_CLK_IN

GPIO14

SMB Clock In / SMB Clock Out. This is the clock for the SMB. In

order to use it properly, the associated GPIO (GPIO14) should be

set to AUX_IN and AUX_OUT_1 simultaneously. The SMB con-

troller determines the direction (in or out) of the associated ball.

SMB_CLK_OUT

SMB_DATA_IN

GPIO15

SMB Data In / SMB Data Out. This is the data line for the SMB. In

order to use it properly, the associated GPIO (GPIO15) should be

set to AUX_IN and AUX_OUT_1 simultaneously. The SMB con-

troller determines the direction (in or out) of the associated ball.

SMB_DATA_OUT

THRM_ALRM#

GPIO10

Thermal Alarm. When connected to an external thermal monitor,

this input can act as a thermal fail-safe to shut down power by sig-

nalling the power management controller to de-assert WORKING

and WORK_AUX. Set GPIO10 to the AUX_IN mode to enable this

feature.

IDE_IRQ0

B12

GPIO2

IDE Interrupt. Indicates the external IDE device has completed

the DMA operation.

UART1_IR_TX

GPIO8

UART1 Infrared Transmit. This signal is the data output (TX)

from the infrared mode of UART1. It is available when GPIO8 is

switched to the AUX_OUT_2 mode

UART1_RX

GPIO9

UART1 Receive or UART1 Infrared Receive. This signal is the

data input (RX) to the UART1. It acts as the input in both IR and

conventional modes of UART1. It is available when GPIO9 is

switched to the AUX_IN mode.

UART1_IR_RX

UART1_TX

GPIO8

UART1 Transmit. This signal is the data output (TX) from the con-

ventional mode of UART1. It is available when GPIO8 is switched

to the AUX_OUT_1 mode.

UART2_RX

GPIO3

UART2 Receive. This signal is the data input (RX) to the UART2.

It acts as the input of UART2. It is available when GPIO3 is

switched to the AUX_IN mode.

UART2_TX

GPIO4

UART2 Transmit. This signal is the data output (TX) from the con-

ventional mode of UART1. It is available when GPIO4 is switched

to the AUX_OUT_1 mode.

WORK_AUX

GPIO24

Working Auxiliary. This output is intended to be used to control

external power sources to all devices except memory (which is

intended to be controlled by WORKING). WORK_AUX de-asserts

in synchronism with WORKING.

2.2.9

Debug and Manufacturing Test Interface

Signal Name

Ball No.

Type

Description

TCK

JTAG Test Clock.

Table 2-9. GPIOx Available Functions Descriptions (Continued)

Function Name

Ball

No.

GPIO[x]

Type

Description

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