The DSP has general-purpose and dedicated registers in each of its functional blocks, страница 30

Address

Name

Comment

0x101C-0x101D

USB EP11 Description

Configures Endpoint

0x101E-0x101F

USB EP11 NAK Counter

0x1020-0x1021

USB EP STALL Policy

0x1040-0x1043

USB EP1 Code Download Base Address

Starting address for code download on Endpoint 1

0x1044-0x1047

USB EP2 Code Download Base Address

Starting address for code download on Endpoint 2

0x1048-0x104B

USB EP3 Code Download Base Address

Starting address for code download on Endpoint 3

0x1060-0x1063

USB EP1 Code Current Write Pointer Offset

Current write pointer offset for code download on Endpoint 1

0x1064-0x1067

USB EP2 Code Current Write Pointer Offset

Current write pointer offset for code download on Endpoint 2

0x1068-0x106B

USB EP3 Code Current Write Pointer Offset

Current write pointer offset for code download on Endpoint 3

0x2000-0x2001

USB Register I/O Address

0x2002-0x2003

USB Register I/O Data

0x3000-0x3FFF

USB MCU Program Mem

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

TB

LT

LT

TY

TY

DR

PS

PS

PS

PS

PS

PS

PS

PS

PS

PS

PS[9:0]

Maximum packet size for Endpoint

LT[1:0]

Last transaction handshake indicator bits sent by the ADSP-2192: 00 = Clear 01 = ACK 10 = NAK 11 = ERR

TY[1:0]

Endpoint type bits:

00 = DISABLED 01 = ISO 10 = Bulk 11 = Interrupt

DR

Endpoint direction bit: 1 = IN 0 = OUT

TB

Toggle bit for Endpoint. Reflects the current state of the DATA toggle bit.

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

X

X

X

X

X

X

X

X

X

X

NE

ST

NC

NC

NC

NC

NC[3:0]

NAK counter. Number of sequential NAKs that have occurred on a given Endpoint. When N[3:0] is equal to the base NAK counter NK[3:0] value in the Endpoint Stall Policy register, a zero-length packet or packet less than maxpacketsize will be issued.

ST

A value of 1 means: Endpoint is stalled

NE

1 = Enable NAK counter 0 = Disable NAK counter