ST18-AU1 STMICROELECTRONICS [STMicroelectronics], ST18-AU1 Datasheet - Page 47

• Manufacturer Part Number: ST18-AU1
• Description: SIX-CHANNEL DOLBY AC3/MPEG2 AUDIO DECODER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

11.2 I-memory bus extension - direct and through BSU
For direct bus extension for I-memory the internal program memory is used from address 0 to
16383 (16K).
The BSU can be programmed to allow either direct extension or extension through the BSU
for IA above 16383.
Note:
11.3 X-memory bus extension - direct and through BSU
The internal program memory is used from address 0 to 16383 (16K).
Direct bus extension or bus extension through the BSU is controlled by setting the X-bus
related BSU registers.
11.4 Y-memory bus extension through BSU
The internal program memory is used from address 256 to 8192.
Y-memory bus extension must be through the BSU. It is controlled by setting the Y-bus related
BSU registers.
Initial reset should occur with MODE_RESET = 1, because internal program RAM is not ini-
tialized.
ST18-AU1
47/87