Analog Devices ADSP-2192 specifications USB Mcucode, Xxx

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	ADSP-2192							For current information contact Analog Devices at (781) 461-3881
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	Table 17. CONFIG DEVICE String Descriptor Index 2 (Product)
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P						FieldA			Description
	OffsetC
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	T		A
0			D			bLength			Descriptor Length = 34 bytes
1						bDescriptorType			Descriptor Type = String
2-31						bString			ADI USB Device
	Configuration 0, 1, and 2 Device Definition								Endpoint 0 Definition

October 2000

Value

0x22

0x03

•FIXED ENDPOINTS

•CONTROL ENDPOINT 0

•Type: Control

•Dir: Bi-directional

•Maxpacketsize: 8

•BULK OUT ENDPOINT 1, 2, 3 = Used for code download to DSP

•Type: Bulk

•Dir: OUT

•Maxpacketsize: 64

•PROGRAMMABLE ENDPOINTS: 4 5 6 7 8 9 10 11

•Programmable in:

•Type: via USB Endpoint Description Register

•Direction: via USB Endpoint Description Register

•Maxpacket size: via USB Endpoint Description Register

•Memory Allocation: via DSP Memory Buffer Base Addr, DSP Memory Buffer Size, DSP Memory Buffer RD Pointer Offset, DSP Memory Buffer Write Pointer Offset Registers

Note: The GENERIC endpoints are shared between all interfaces.

In addition to the normally defined USB standard device requests, the following vendor specific device requests are supported with the use of EP0. These requests are issued from the host driver via normal SETUP transactions on the USB.

USB MCU Code Download

Address <15:0> is the first address to begin code download to; the address is incremented automatically after each byte is written. USB MCUCODE is a three-stage control trans- fer with an OUT data stage. Stage 1 is the SETUP stage, stage 2 is the data stage involving the OUT packet, and stage 3 is the status stage. The length of the data stage is determined by the driver and is specified by the total length of the MCU code to be downloaded. See Table 18 on page 24 for details about the USB MCUCODE (code download) fields.

USB REGIO (Write)

Address <15:15> = 1 indicates a write to the MCU register space; Address <15:15> = 0 indicates a write to the DSP register space. When accessing DSP register space, the MCU must write the data to be written into the USB Reg- ister I/O Data register and write the address to be written to the USB Register I/O Address register. Bit 15 of the USB Register I/O Address register starts the transaction and bit 14 is set to one to indicate a WRITE.

USB REGIO (register write) is a three-stage control trans- fer with an OUT data stage. Stage 1 is the SETUP stage, stage 2 is the data stage involving the OUT packet, and stage 3 is the status stage. See Table 19 on page 25 for details about the USB REGIO (register write) fields.

Table 18. USB MCUCODE (Code Download)

Offset

Field

Size

Value

Description

0

bmRequest

1

0x40

Vendor Request, OUT

1

bRequest

1

0xA1

USB MCUCODE

2

wValue (L)

1

XXX

Address <0:7>

Y

3

wValue (H)

1

XXX

Address <8:15>

R

A

4

wIndex (L)

1

0x00

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L

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M

A

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C

L

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N

24

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H

This information applies to a product under development. Its characteristics and specifications are subject to changePwith-

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out notice. Analog Devices assumes no obligation regarding future manufacturing unless otherwise agreed to in writing.

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