Panasonic JB-3300 Technical Manual page 183

e) *REF ADR ..... LOW when VRAM is refreshed. Enables refresh
RFA address output to the VRAM address.
CLK1
CLK2 \
CLK3
jl
LCMAO | i
*CRTSYNC \ | L|
me
ADV CRT __| Jiser |
CRT ADR
RAM WAIT ° Le
*CPU ADR -—
*REF ADR
VRAM Address
Figure 5-39 VRAM Access Timing Chart
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