ST18AU1_DS View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'ST18AU1_DS' PDF : 87 Pages View PDF
ST18-AU1
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:
Initial reset should occur with MODE_RESET = 1, because internal program RAM is not ini-
tialized.
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.
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