GPBA01B

© Generalplus Technology Inc.

Proprietary & Confidential

19

MAY 28, 2007

Version: 1.1

11. APPLICATION CIRCUITS & EXAMPLE PROGRAM

11.1. Simplest Application--One Flash Memory Extension

MA0

MA1

MA2

MA3

MA4

MA5

MA6

MA7

MA8

MA9

MA10

MA11

MA12

MA13

MA14

MA15

MA16

MA18

AD1

AD2

AD3

AD4

AD5

AD6

AD7

MA3

MA9

MA16

MA15

MA2

CI

MA1

MA8

MA4

MA5

MA0

MA7

VDD

OE#

MA10

MA6

AD0

AD0

CI

AD5

AD6

AD4

AD2

MC1

AD3

MC0

AD7

AD1

MA17

WE#

WE#

OE#

CE0#

U2

AT29C040 FLASH

2

3

4

5

6

7

8

9

10

11

12

13

14

15

17

18

19

20

21

22

23

24

25

26

27

28

29

31

30

1

A16

A15

A12

A7

A6

A5

A4

A3

A2

A1

A0

I/O0

I/O1

I/O2

I/O3

I/O4

I/O5

I/O6

I/O7

CE

A10

OE

A11

A9

A8

A13

A14

WE

A17

A18

U1

SPBA01B_PLCC84

17

18

19

20

21

22

23

24

25

26

27

69

68

67

66

65

64

63

62

61

60

59

P01

P00

VDD

P17

P16

P15

P14

P13

P12

P11

P10

P22

P21

P20

P55(WE#)

OSCO(OE#)

CI

CO

CLKO

DVP

XO

XI

JP1

(SPLC131/SPLB31...)

CI

MC1

MC0

AD7

AD6

AD5

AD4

AD3

AD2

AD1

AD0

Use SPBA01B--BEX(Bus Extender) to access standard memory

MPU

%PullBEXENLow

; Set CI to 0

%PullBEXENHigh

; Set CI to 1

LDA

#1

STA

P_0DH_BexVolID

; Set Volume-ID and Select-IDto 1

LDA

#%011XXXXX

STA

P_23H_BEXConfig

; Set CFG=3 for 4MB configuration

; 128 banks in total(bank0~bank127)

LDA

#%1000-0010

STA

P_00H_BexBank

; Set bank to 2,

; mapping $8000-$BFFF to $010000-$013FFF

; mapping $4000-$7FFF to $014000-$017FFF

(access bank 2)

...

LDA

#%1000-0000

STA

P_00H_BexBank

; Set bank to 0,

; mapping $8000-$BFFF to $000000-$003FFF

; mapping $4000-$7FFF to $004000-$007FFF

(access bank 0)

...

LDA

#%1111-1111

STA

P_00H_BexBank

; Set bank to 127,

; mapping $8000-$BFFF to $3F8000-$3FBFFF

; mapping $4000-$7FFF to $3FC000-$3FFFFF

(access bank 127)

...

Note: %PullBEXENLow and %PullBEXENHigh are macros that control the high or low for GPBA01B’s CI.

SPLC131/GPLB31…)

GPBA01B_PLCC84

GPBA01B