The Intel 8755A is an erasable and electrically reprogrammable ROM (EPROM) and 1/O chip to be used in the 8085AH microprocessor systems. The EPROM portion is organized as 2048 words by 8 bits.
It has a maximum access time of 450 ns to permit use with no wait states in an 8085AH CPU. The l/O portion consists of 2 general-purpose 1/O ports. Each /O port has 8 port lines, and each I/O port line is individually programmable as input or output.
8755 Pinout
8755 Pin Configuration
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | PC&E | PROG & CE1′ |
| 2 | CE2 | Chip Enable Pin 2 |
| 3 | CLK | Clock Pin |
| 4 | RESET | Reset |
| 5 | VDD | Supply Voltage |
| 6 | READY | Ready Pin |
| 7 | IO/M | Internal Memory Select |
| 8 | IO/R | IO/Read Pin |
| 9 | RD | Read (Active Low) |
| 10 | LOW | (Active Low) |
| 11 | ALE | Address Latch Enable |
| 12-19 | AD0-AD7 | Address Data Bus |
| 20 | VSS | Supply Voltage |
| 24-31 | PA0-PA7 | Port A |
| 32-39 | PB0-PB7 | Port B |
| 21-23 | A | A Pin |
| 40 | Vcc | Positive Voltage Supply |
8755 Key Features
- 2048 Words x 8 Bits
- Single +5Vv Power Supply (Vcc)
- Directly Compatible with 8085AH
- U.V. Erasable and Electrically Reprogrammable
- Internal Address Latch
- 2 General Purpose 8-Bit /O Ports Each /O Port Line Individually
- Programmable as Input or Output
You can download this datasheet for 8755 16k EPROM – Datasheet from the link given below:
