Signal Definitions

32581C

3.4.9IDE Interface Signals (Continued)

Signal Name

Ball No.

Type

Description

Mux

 

 

 

 

 

IDE_IORDY0

AD1

I

I/O Ready Channels 0 and 1. When de-asserted, these

TFTD11

 

 

 

signals extend the transfer cycle of any host register

 

IDE_IORDY1

B29

I

GPIO10+DSR2#+

access if the required device is not ready to respond to

 

 

 

SDTEST1

 

 

 

the data transfer request.

 

 

 

 

 

 

 

Note: If selected as IDE_IORDY0 or IDE_IORDY1

 

 

 

 

function(s) but not used, then signal(s) should be

 

 

 

 

tied high.

 

 

 

 

 

 

IDE_DREQ0

AC4

I

DMA Request Channels 0 and 1. The IDE_DREQ sig-

TFTD8

 

 

 

nals are used to request a DMA transfer from the

 

IDE_DREQ1

C31

I

GPIO8+CTS2#

SC3200. The direction of transfer is determined by the

 

 

 

+SDTEST5

 

 

 

IDE_IOR/IOW signals.

 

 

 

 

 

 

 

Note: If selected as IDE_DREQ0/ IDE_DREQ1 func-

 

 

 

 

tion but not used, tie IDE_DREQ0/IDE_DREQ1

 

 

 

 

low.

 

 

 

 

 

 

IDE_DACK0#

AD4

O

DMA Acknowledge Channels 0 and 1. The

TFTD0

 

 

 

IDE_DACK# signals acknowledge the DREQ request to

 

IDE_DACK1#

C30

O

GPIO7+RTS2#

initiate DMA transfers.

 

 

 

+SDTEST0

 

 

 

 

 

 

 

 

 

IRQ14

AF1

I

Interrupt Request Channels 0 and 1. These input sig-

TFTD1

 

 

 

nals are edge-sensitive interrupts that indicate when the

 

IRQ15

AJ8

I

GPIO11+RI2#

IDE device is requesting a CPU interrupt service.

 

 

 

 

 

 

 

Note: If selected as IRQ14/IRQ15 function but not

 

 

 

 

used, tie IRQ14/IRQ15 low.

 

 

 

 

 

 

3.4.10Universal Serial Bus (USB) Interface Signals

Signal Name

Ball No.

Type

Description

Mux

 

 

 

 

 

POWER_EN

AH1

O

Power Enable. This signal enables the power to a self-

---

 

 

 

powered USB hub.

 

 

 

 

 

 

OVER_CUR#

AF4

I

Overcurrent. This signal indicates that the USB hub has

---

 

 

 

detected an overcurrent on the USB.

 

 

 

 

 

 

DPOS_PORT1

A28

I/O

USB Port 1 Data Positive for Port 1.1

---

DNEG_PORT1

A29

I/O

USB Port 1 Data Negative for port 1.1

---

DPOS_PORT2

B27

I/O

USB Port 2

Data Positive for Port 2.1

---

DNEG_PORT2

B28

I/O

USB Port 2

Data Negative for Port 2.1

---

DPOS_PORT3

A26

I/O

USB Port 3

Data Positive for Port 3.1

---

DNEG_PORT3

A27

I/O

USB Port 3

Data Negative for Port 3.1

---

1.A 15K ohm pull-down resistor is required on all ports (even if unused).

AMD Geode™ SC3200 Processor Data Book

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AMD SC3200 manual Universal Serial Bus USB Interface Signals