USB97C201 datasheet(15/59 Pages) SMSC

15 / 59 page

SMSC DS – USB97C201

Page 15

Rev. 03/25/2002

PRELIMINARY

6.1.2

MCU MEMORY MAP: XDATA SPACE

Table 3 - MCU XData Memory Map

8051 ADDRESS

DATA SPACE

ACCESS

0x3F30-0xFFFF

External Memory or I/O Devices

External

(IOR or IOW

active)

0x3F00-0x3F2F

Internal Test Registers (reserved access)

DO NOT ACCESS

0x33F7-0X3EFF

External Memory or I/O Devices

External

(IOR or IOW

active)

033F6

External ATA Interface I/O

External

(IOR or IOW

active)

0x31F8-0x33F5

External Memory or I/O Devices

External

(IOR or IOW

active)

0x31F0-0x31F7

External ATA Interface I/O

External

(IOR or IOW

active)

0x30F4-0x31EF

External Memory or I/O Devices

External

(IOR or IOW

active)

0X30F0-0X30F3

Internal Test Registers (reserved access)

DO NOT ACCESS

0X0700-0X30EF

External Memory or I/O Devices

External

(IOR or IOW

active)

0x0400-0x06FF

768 Byte SRAM

Internal

0x0000-0x03FF

(see Note 1)

External

(IOR or IOW

active)(see Note 1)

Note 1: This XDATA space is accessed using MOVX instructions. A region of 8051 Special Function Registers

(SFR) is also accessible at 0x0100 to 0x01FF addresses using the MOV instructions. In addition to the

normal 8051 SFRs, there are also numerous Runtime Registers in this SFR space. These Runtime

Registers are external to the 8051, but internal to the USB97C201.

USB97C201 Datasheet(PDF) 15 Page - SMSC Corporation

USB97C201 Datasheet(HTML) 15 Page - SMSC Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

Datasheet Download

Link URL