PSD934210MT View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

PSD934210MT

Flash PSD, 3.3V Supply, for 8-bit MCUs 2 Mbit + 256 Kbit Dual Flash Memories and 64 Kbit SRAM

STMicroelectronics 

Figure 21. Interfacing the PSD with the 80C51X, 8-bit Data Bus

PSD834F2V

RESET

80C51XA

21

20

XTAL1

XTAL2

11 RXD0

13

6

7

TXD0

RXD1

TXD1

9

8

T2EX

T2

16 T0

10 RST

14 INT0

15

INT1

A0/WRH

A1

A2

2

3

4

A3 5

A4D0

A5D1

A6D2

A7D3

43

42

41

40

39

A8D4

A9D5

A10D6

A11D7

A12D8

A13D9

38

37

36

24

25

A14D10

26

27

A15D11

A16D12

A17D13

A18D14

28

29

30

31

A19D15

A0

A1

A2

A3

A4D0

A5D1

A6D2

A7D3

A8D4

A9D5

A10D6

A11D7

A12

A13

A14

A15

A16

A17

A18

A19

35 EA/WAIT

17 BUSW

PSEN 32

RD 19

WRL 18

33

ALE

PSEN

RD

WR

ALE

A4D0

A5D1

A6D2

A7D3

A8D4

A9D5

A10D6

A11D7

PSD

30

31 ADIO0

32

33

ADIO1

ADIO2

ADIO3

34

35

AD104

AD105

36

37

ADIO6

ADIO7

A12

A13

A14

A15

A16

A17

A18

A19

39

40

ADIO8

41

42

43

44

45

ADIO9

ADIO10

ADIO11

AD1012

AD1013

ADIO14

46 ADIO15

47 CNTL0 (WR)

50 CNTL1(RD)

49 CNTL 2 (PSEN)

10

8 PD0-ALE

9

PD1

PD2

48

RESET

29 A0

PA0

PA1

28

A1

PA2 27 A2

PA3

PA4

PA5

25

24

23

A3

PA6 22

PA7 21

7

PB0

PB1

PB2

PB3

PB4

6

5

4

3

2

PB5

PB6

PB7

52

51

20

PC0

PC1

PC2

PC3

PC4

19

18

17

14

PC5

PC6

PC7

13

12

11

RESET

68HC11. Figure 22 shows a bus interface to a

68HC11 where the PSD is configured in 8-bit mul-

tiplexed mode with E and R/W settings. The DPLD

AI02883C

can be used to generate the READ and WR sig-

nals for external devices.

43/89

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