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=EG 8 B I T 0
141
=EC 8 B I T
1A2
=EG 8 ? I T
143
▪ 3 , T
144
• = ! T
2A1
S = T
=:....r
242
▪ 3 = I T 0
243
S B I T 7
244
- L - C 13
GI
T4HCTz_44
=EG 8 B I T 8
1A1 I Y 1
=.7,.; B
T 9
142 1 V 2
a
BIT 1
143 I Y 3
8
-tt., 8 B I T
144 1 Y 4
8 ? I T 12
241 2 Y 1
=EG 8 = T
2A2 2 Y 2
.a
5
4
2A3 2 Y 3
7
9 1 T 1 5 S
P 5 3
2A4 2 Y 4
13
Gl
74HCT244
P11C5)PPASE+8*
5.2.1.6 A d d i t i o n a l Write Registers
Decoding is provided for some additional write registers. Because each decoded
5.2.1.6.1
control signal is for 16 bits and the internal bus is 32 bits wide, the user must pay
attention to which group o f 16 data bits to connect to any added registers.
Controls WBASE+O, WBASE+8 and WBASE+C should be used with BDO
through BD15. Controls WBASE+2, WBASE+6, WBASE+A and WBASE+E
should be used with BD16 through BD31. Controller accesses of the 32 bits are
automatically handled. The decoder control signals appear a t P11, the user
5-3
9130 ( P 11 4 11
1 g
/
IY1
8D1 P 1 ' 4 '
/
i y 2
1143
4 3 0 2
, Y 3
3 8 3
- 1 " A 4 .
IY4
884
' A ' )
/
:Y1
5 8 5
A l
. A 0 1
/
2Y2
5 0 6
A t
/
213
3 0 7 , A 1 1 4 8 )
2Y4
IS
9 0 8
( P 1 1 4 9 )
/
3D9 ( 1 0 11 4 1 0 )
1 4
B
D
I
O
r e / 1 A 1 1 )
p11412
• 3 0 1 1
/
8 3 1 2 , P / 1 4 1 3
/
3 0 1 3 1 1 4 1 4 1
/
P114151 /
3014
8015
/
Additional Read Registers - Internal Decoding
2"3 A a r r
141 1 Y 1
142 , Y 2
56 4 3 , T
143 ' Y 3
T
. 4 4
4
..4-3 A
2 A 1
A l i 3
4
2 4 2
Q ' t
2 4 3
A
2 0 , Y 4
13
31
7 4 H C 1 2 4 4
0E3 A a n . 8
141 Y 1
.;..EGA B I T 9
142 . Y 2
AIG A 911. 1 0
143 I Y 3
=EG A B I T i 1
1A4 I Y 4
- 5 3 4 B I T 12
2AI : . ( 1
:'53 4 3 I T 1 3
242 2 Y 2
=EG A 3 I T 1 4
243 Z Y 3
=KG A B I T
2A4 , y 4
1G
Cl
74HCT 4 4
(P1IC6)ReASE+A•
DATA BUS
'8 8 8 1 6 (P11417
k
-
8
i
7
h A 1 1 A 1 8
18 P I 1419
r
4
r ' Z O
1 A I I 4 2 1 + , /
,2021 . . 0 11 A 2 2
5 ) 2 2 ' P 11 4 2 3 1 . . . . /
2
2 Y 3
5 8 2 3 ( P 11 A 2 4 ,
IB ? 0 2 4
P 1 1 4 2 5
/
3025 P l l A I L /
•0
4 8 0 2 6
P l 1 A 2
/
3D27 P l 1 A 2 8
/
=026 '_P11429,
/
3329
'Fll 14.30' /
zf1'10
P11431I/
--7331 P 1 1 4 3 2
/
P l l
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