Panasonic JB-3300 Technical Manual page 192

AO to A7 HHT
*RAS
*CAS
*WE EVEN
*VRAM WR
*CRT CSO
*CRT CSI
ne'|
Even Address Memory Block
*WE ODD
Figure 5-47
| LS 245 |
| [v. RAM |
| 20 ——
AO A ~~ A | \
Ip
Pe LLL A B S —
> VDO to 7
—{||||/--Haas y Y | =
_ : CAS VY Y, DIR O€b | — *VRAM EVEN
Hive Z Y | =
| Z Z | | =
| Z ] LS374 [ | E=
| [Vo RAM iy WZ _—
I } o y Y torch [=
Ip a
o a
Uli p
0 Fe CHBO to 7
| ——
He J =
LIcas Yi clk o€ == *EN EVEN
| we YY . =
|
Wi
=
Poa G LS374 —
a ZY 2nd Dato —
ZY fotch ——
| LZ =
| =
cLK OC = EN EVEN
| —
Le} Poos
pocnaaa5 naa pasa7 =
|
LS245
=
| v.RaM —
|
#1
oe
| —
SSN
DS BEKO
rice LNILN
P| ( | CAS —N N oIR oC *VRAM ODD
rt NIN
N
NEN case
1 ] v.rRam N \N Ist Data
| HI na N N latch
ail» ie 07 (SN
N
0 Q
ATBO to 7
l} N |
RAS
! CAS LN CLK OC *GRAPHIC
e \
|
| Odd Address N LS 374
|Memory Block N 2nd Dato
——_— ~ SN latch
BINS
|
|
| cLk O€
Lo4
VRAM Address Block Diagram
IT - 72