PSD413A2 datasheet(12/123 Pages) STMICROELECTRONICS

12 / 123 page

PSD4XX Family

Pin Name

Pin Function

Type

Function Descriptions

PE0

Port PE, pin 0

I/O

Multiple functions

1. BHE

1. High byte enable, 16 bit data

2. PSEN

2. Read program memory, 8031 signal

3. WRH

3. Write high data byte

4. UDS

4. Upper Data Strobe

5. SIZ0

5. Byte enable, 68300 signal

6. PE0

6. I/O pin

7. PE0

7. ZPLD I/O pin

8. PE0

8. Latched Address Out – A0

PE1

Port PE, pin 1

I/O

Multiple functions

1. ALE

1. Address strobe

2. PE1

2. I/O pin

3. PE1

3. ZPLD I/O pin

4. PE1

4. Latched Address Out – A1

PE2

Port PE, pin 2

Multiple functions

1. PE2

I/O

1. I/O pin

2. PE2

2. ZPLD I/O pin

3. PE2

3. Latched Address Out – A2

PE3

Port PE, pin 3

Multiple functions

1. PE3

I/O

1. I/O pin

2. PE3

2. ZPLD I/O pin

3. PE3

3. Latched Address Out – A3

PE4

Port PE, pin 4

Multiple functions

1. PE4

I/O

1. I/O pin

2. PE4

2. ZPLD I/O pin

3. PE4

3. Latched Address Out – A4

PE5

Port PE, pin 5

Multiple functions

1. PE5

I/O

1. I/O pin

2. PE5

2. ZPLD I/O pin

3. PE5

3. Latched Address Out – A5

PE6

Port PE, pin 6

Multiple functions

1. PE6

I/O

1. I/O pin

2. PE6

2. ZPLD I/O pin

3. PE6

3. Latched Address Out – A6

PE7

Port PE, pin 7

Multiple functions

1. APD CLK

1. Automatic Power Down Clock Input

2. PE7

I/O

2. I/O pin

3. PE7

3. ZPLD I/O pin

4. PE7

4. Latched Address Out – A7

Vstdby

SRAM power pin for standby

operation (battery backup)

VCC

IVCC power pin

GND

Ground pin

8.0

Table 2.

PSD4XX Pin

Descriptions

(Cont.)

*Available only in PSD4XXA2 and ZPSD4XXA2 Series.

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