SED1374 Datasheet, PDF (353/420 Pages) Epson Company – SED1374 Embedded Memory Color LCD Controller

Epson Research and Development
Vancouver Design Center
Page 21
This code was entered into the memory of the MPC821ADS using the line-by-line
assembler in MPC8BUG, the debugger provided with the ADS board. It was executed on
the ADS and a logic analyzer was used to verify operation of the interface hardware.
Note
MPC8BUG does not support comments or symbolic equates; these have been added for
clarity.
It is important to note that when the MPC821 comes out of reset, its on-chip caches and
MMU are disabled. If the data cache is enabled, then the MMU must be set up so that the
SED1374 memory block is tagged as non-cacheable, to ensure that accesses to the
SED1374 will occur in proper order, and also to ensure that the MPC821 does not attempt
to cache any data read from or written to the SED1374 or its display buffer.
Interfacing to the Motorola MPC821 Microprocessor
Issue Date: 99/01/05
SED1374
X26A-G-010-02