BL51: Configuring XDATA Latch for Code Banking

Information in this article applies to:

• C51 All Versions

QUESTION

I want to use the XDATA latch for my banked application; how do I set this up?

ANSWER

In L51_BANK.A51 this is controlled by the values specified for ?B_XDATAPORT and ?B_FIRSTBIT. Set ?B_XDATAPORT to the address of the latch and ?B_FIRSTBIT to the bit where you want addressing to begin.

MORE INFORMATION

• Refer to XDATA Port in the BL51 User's Guide.
• Refer to Code Banking in the BL51 User's Guide.

Last Reviewed: Thursday, February 25, 2021