LC78711E Datasheet, PDF (17/43 Pages) Sanyo Semicon Device – Graphics Display Processor

LC78711E
Microprocessor Interface
1. Data transfer format (for command transfers)
• A command identification code (control item) must be transferred before the data is transferred when setting up
commands, positions (coordinates), or color codes (color table).
• If continuous data transfer mode is not set up, then data transfers of bit map data and sprite (cursor) data also
require that a command identifier code (control item) be transferred before the data is transferred.
• Transfer format (example)
x, Ž, : Command identification code (control item)
, , ‘: Command register setup data
’:
Serial transfer completes
2. Transfer format (when continuous data transfer mode has been set up)
• Continuous data transfer mode must be set up by the data (1 byte) that follows a command identification code
(control item). When a RAM data transfer command is set up and the data transfer started, the data that follows (in
byte units) is all acquired as RAM data.
Note: If continuous data transfer mode is set up, the RAM write address must be set (by command) to automatic
increment mode.
• Transfer format (example)
x, Ž:
:
, , ‘:
’:
Command identification code (control item)
Command register setup data
RAM data
Serial transfer completes and continuous data transfer mode is cleared.
Note: When continuous data transfer mode is cleared, the command register setting is not reset. If the control
microprocessor immediately issues a RAM data transfer command and starts the data transfer, the
LC78711E will switch to continuous data transfer mode once again.
No. 5476-17/43