USB97C201-MN SMSC [SMSC Corporation], USB97C201-MN Datasheet - Page 15

• Manufacturer Part Number: USB97C201-MN
• Description: USB 2.0 ATA/ ATAPI Controller
• Manufacturer: SMSC [SMSC Corporation]

6.1.2
Note 1: This XDATA space is accessed using MOVX instructions. A region of 8051 Special Function Registers
SMSC DS – USB97C201
0x3F30-0xFFFF
0x3F00-0x3F2F
0x33F7-0X3EFF
033F6
0x31F8-0x33F5
0x31F0-0x31F7
0x30F4-0x31EF
0X30F0-0X30F3
0X0700-0X30EF
0x0400-0x06FF
0x0000-0x03FF
MCU MEMORY MAP: XDATA SPACE
(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.
8051 ADDRESS
External Memory or I/O Devices
Internal Test Registers (reserved access)
External ATA Interface I/O
External Memory or I/O Devices
External ATA Interface I/O
External Memory or I/O Devices
Internal Test Registers (reserved access)
External Memory or I/O Devices
768 Byte SRAM
(see Note 1)
External Memory or I/O Devices
Table 3 - MCU XData Memory Map
PRELIMINARY
DATA SPACE
Page 15
External
(IOR or IOW
active)
DO NOT ACCESS
External
(IOR or IOW
active)
External
(IOR or IOW
active)
External
(IOR or IOW
active)
External
(IOR or IOW
active)
External
(IOR or IOW
active)
DO NOT ACCESS
External
(IOR or IOW
active)
Internal
External
(IOR or IOW
active)(see Note 1)
ACCESS
Rev. 03/25/2002