DS80C400 C Libraries: SFR's set by the ROM Loader

The following is a list of SFR that are set by the DS80C400's ROM Loader before control is transferred to a user application.

This table is provided for information only. It is recommended that applications explicitly set SFR's to a default state if the application intends to use that SFR.

SFR Value set by loader Comments
ACON (9D) 00000110 Enables extended stack and 24-bit contiguous mode
P4CNT (92) 00101111 2M blocks, all chip enables on
P5CNT (A2) 00000111 Enable PCE outputs
P6CNT (B2) 00100111 Enable ~CE4 to ~CE7
MCON (C6) 10101111 Relocate Internal and CAN RAM
MCON1 (D6) 00001111 Combined code/data for CE4 to CE7