| Pin |
Description |
| 1,2 |
These
terminals are directly connected to the Crystal. |
| 3 |
Reset
Terminal which can be used in reseting other memory and
peripheral devices. |
| 4 |
Serial
Output Data. This terminal are TTL output lines which
can be used to transfer serial stream of data.
|
| 5 |
Serial
Input Data. This terminal are TTL input lines which can
function as an input line to read serial stream of data |
| 6-11 |
Interrupt
Lines. This will be discussed later in Chapter 6 |
| 12-19 |
Multiplexed
Address and Data Lines
A0-A7 and D0 to D7 |
| 20 |
IC
Ground Path |
| 21-28 |
Address
Lines A8-A15 |
| 29 |
State
Status LSB |
| 30 |
Address
Latch Enable |
| 31 |
Write
Control Line (Active Low) |
| 32 |
Read
Control Line (Active Low) |
| 33 |
State
Status MSB |
| 34 |
IO
/ Memory Control Line |
| 35-39 |
Machine
Control Lines. This will be discussed later in Chapter
6 |
| 40 |
5Volts
DC Supply Line |
