COM90C66 Datasheet, PDF (40/76 Pages) SMSC Corporation – ARCNET Controller/Transceiver with AT Interface and On-Chip RAM

9
A11-A19
BALE
TRANSPARENT ^{SA11-SA19 9}
LATCH
Falling Edge of BALE
Latches the Address
5
Rising Edge of BALE
Makes Latch Transparent
COMPARATOR
(for 2K segment)
MS0-MS4
3
5
LA17-LA19
COMPARATOR
(for 128K segment)
5
MUX
16EN
nMEMCS16
nENROM
DECODE
MODE
AEN
12
SA4-SA15
BALE
IOS0-IOS2
FIGURE 12 – nMEMCS16 GENERATION
TRANSPARENT ¹²
LATCH
COMPARATOR
nIOCS16
SA2-SA3
2 TO 4
2
DECODER ¹¹
10
01
00
FIGURE 12A - nIOCS16 GENERATION
40