MB86294 Datasheet, PDF (47/305 Pages) Fujitsu Component Limited. – Grraphiics Controller specifications

FUJITSU LIMITED
PRELIMINARY and CONFIDENTIAL
4.5 I n t e r r u p t
Coral issues interrupt requests to the host CPU. Following shows the types of interrupt factor and they
can be enabled/disabled by IMASK (Interrupt Mask Register).
• Vertical synchronization detect
• Field synchronization detect
• External synchronization error detect
• Drawing command error
• Drawing command execution end
4.6 S H 3 M o d e
In the SH3 mode, operation is assured under the following conditions:
Normally not ready mode
• BCLK (CPU bus clock) is 50 MHz or less.
• The XWAIT setup time is 9.0 ns or less.
Normally ready mode
• Three cycles or more are set for the software wait.
4.7 W a i t
Software wait
The software wait is a wait performed on the CPU side; this wait specifies how many cycles of the
ready signal (XRDY) sampling timing is ignored.
Hardware wait
The hardware wait is a wait on the CORAL side that occurs when CORAL itself cannot read/write data
immediately.
MB86294/294S CORAL_LB
Graphics Controller
47
Specifications Rev. 1.0