User Manual

5-4 EP7309/11/12 User’s Manual - DS508UM4

System Registers

MaverickKey

™

Unique-ID

MaverickKey registers are unique ID numb ers that are programmed for use in secure

web content and commerce. T hese IDs, b urned into specific register locations give the

OEMs a method for SDMI (Secure Digital Music Initiative) or any oth er

authentication mechanism.

There is a single 32-bit Unique ID as well as a 128-bit random ID and are laser

programmed at the factory. These numbers can be used to match secure or

copyrighted content with the ID of the 73xx device f or the purpose of transm itting

said information over a secure connection.

The Uniqu e ID i s located at 0x8000.2440. The 128-bit random ID can be found at

0x8000.2700-270C.

System Control Register Descriptions

System Control Register 1 (SYSCON1)

Address: 0x8000.0100, Read / Write

Definition: The SYSCON1 system control register is a 21-bit read/write register

which controls some of the general c onfiguration parameters for the

EP73xx as well as the control an d status of internal peripherals. All

bits i n this register are cleared upon system reset (nSYSRES).

Bit Descriptions:

Keyboard Scan:This four bit field defi nes the state of the k eyboard column

driver. The following table defines these states.

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

RSVD IRTXM WAKEDI

EXCKE

ADCKSEL

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

SIREN CDENRX CDENT

LCDEN DBGEN BZMOD BZTOG UART1E

TC2S TC2M TC1S TC1M Keyboard Scan

Table 5-2: Keyboard Column Drive State

Value Column Drive State

0 All high

1 All low

2-7 All Hi-Z (tristate)

8 Column 0 high, all others Hi-Z

9 Column 1 high, all others Hi-Z

10 Column 2 high, all others Hi-Z