Table 3.17 decode of mad pins, Decode of mad pins – Avago Technologies LSI53C876E User Manual

Page 94

3-22

Signal Descriptions

•

MAD[0] – The slow ROM pin. When pulled down, it enables two
extra cycles of data access time to allow use of slower memory
devices.

Note:

All MAD pins have internal pull-up resistors.

Table 3.17

Decode of MAD Pins

MAD[3:1]

Available Memory Space

000

16 Kbytes

001

32 Kbytes

010

64 Kbytes

011

128 Kbytes

100

256 Kbytes

101

512 Kbytes

110

1024 Kbytes

111

No external memory present