
200 THE x86 MICROPROCESSORS
Table 6.1 | (continued)
Pin No. Designation Function Type
33
MN / MX This pin is used to select the mode of
operation – minimum or maximum. For
minimum mode, the pin is to be connected
to the 5 V supply
Input
34 BHE / S7 The ‘Bus High Enable’ is a logic low signal
which is used to enable the ‘high memory
bank‘ of the data bus – the D
8
–D
15
lines
become active then. The status of this pin is
latched along with the address information.
This is multiplexed with the status pin S
7
,
which is always 1
Output
1, 20 GND ‘Ground’ – The common point is to be
connected to two pins. Two Ground
pins are used so as to prevent having