TMP93CS44 datasheet(81/224 Pages) TOSHIBA

81 / 224 page

TMP93CS44/S45

2004-02-10

93CS44-79

(3) Example of usage-3

Figure 3.6.4 is an example in which an external memory is connected to the

TMP93CS44. In this example, ROM 128 Kbytes are connected using 16-bit bus, and

RAM 256 Kbytes are connected using 16-bit bus.

Figure 3.6.4 Example of External Memory Connection (ROM and RAM

= 16 bits)

The TMP93CS44 has built-in ROM and RAM. When ROM and RAM have

insufficient capacity, it is possible to connect an external memory as the example of the

external memory connection. In this example, the memory configuration is as follows.

Memory

Memory Size

Address

Data Bus

Internal

64 Kbytes

FF0000H to FFFFFFH

16 bits

ROM

External 128 Kbytes

400000H to 41FFFFH

16 bits

Internal

2 Kbytes

000080H to 00087FH

16 bits

SRAM

External 256 Kbytes

800000H to 83FFFFH

16 bits

TMP93CS44

D8 to D15

D0 to D7

I/O1 to I/O8

R/ W

Upper byte

I/O1 to I/O8

R/ W

Lower byte

Latch

× 16

Decoder

Address bus

ROMCS

RAMCS

ROM (128 Kbytes

× 16)

RAM (128 Kbytes

× 8)

RAM (128 Kbytes

× 8)

Upper

address

AD8 to AD15

AD0 to AD7

ALE

HWR

AM8/ AM16

TMP93CS44 데이터시트(PDF) 81 Page - Toshiba Semiconductor

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