COM90C66 Datasheet, PDF (16/76 Pages) SMSC Corporation – ARCNET Controller/Transceiver with AT Interface and On-Chip RAM

BALE
A19
A18
A17
A16
A15
A14
A13
A12
A11
nENROM
BALE
A19
A18
A17
A16
A15
A14
A13*
Transparent
Latch
Comparator
5 to 9
Decoder
MEMORY SELECT
FIGURE 4 – MEMORY SELECTOR
Transparent
Latch
Comparator
5 to 7
Decoder
* In I/O 16K X 8 Mode, A13 is a Don't Care
PROM
DECODE
AEN
BALE
A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
FIGURE 5 – PROM SELECTOR
Transparent
Latch
Comparator
I/O SELECTOR
FIGURE 6 – I/O SELECTOR
16
3 to 12
Decoder
MS4
MS3
MS2
MS1
MS0
MS4
MS3
MS2
MS1
MS0
IOS2
IOS1
IOS0