S80296SA View Datasheet(PDF) - Intel

Part Name

Description

Manufacturer

S80296SA

COMMERCIAL CHMOS 16-BIT MICROCONTROLLER

Intel 

80296SA COMMERCIAL CHMOS 16-BIT MICROCONTROLLER

5.0 ADDRESS MAP

Table 5. 80296SA Address Map

Hex

Address

Description (Note 1, Note 2)

Addressing Modes for

Data Accesses

FFFFFF External device (memory or I/O) in 1-Mbyte mode (CCB1.1=0)

FFF800 A copy of internal code RAM in 64-Kbyte mode (CCB1.1=1)

Extended

FFF7FF

FF2080

External program memory (Note 3)

Extended

FF207F

FF2000

External special-purpose memory (CCBs and interrupt vectors)

Extended

FF1FFF

FF0400

External device (memory or I/O) connected to address/data bus

Extended

FF03FF

FF0000

Reserved for in-circuit emulators

—

FEFFFF Overlaid memory (reserved for future devices);

0F0000 locations xF0000–xF03FFH are reserved for in-circuit emulators

—

0EFFFF

010000

External device (memory or I/O) connected to address/data bus

Extended

00FFFF Internal code RAM (code or data); can be windowed by WSR1. In Indirect, indexed, extended,

00F800 64-Kbyte mode, code RAM is identically mapped into page FFH.

windowed direct

00F7FF External device (memory or I/O) connected to address/data bus; Indirect, indexed, extended,

00F000 can be windowed by WSR1

windowed direct

00EFFF

002000

External device (memory or I/O) connected to address/data bus

Indirect, indexed, extended

001FFF Internal peripheral special-function registers (SFRs);

001F00 can be windowed by WSR or WSR1

Indirect, indexed, extended,

windowed direct

001EFF

001C00

Reserved (future SFR expansion)

—

001BFF

000400

External device (memory or I/O) connected to address/data bus

Indirect, indexed, extended

0003FF

000200

Reserved (future register file expansion)

—

0001FF Upper register file (general-purpose register RAM)

000100 can be windowed by WSR or WSR1

Indirect, indexed, extended

windowed direct

0000FF

00001A

Lower register file (general-purpose register RAM)

Direct, indirect, indexed,

extended

000019

000000

Lower register file (stack pointer and CPU SFRs)

Direct

NOTES:

1. Unless otherwise noted, write 0FFH to reserved memory locations and write 0 to reserved SFR bits.

2. The contents or functions of reserved locations may change in future device revisions, in which case a

program that relies on one or more of these locations might not function properly.

3. External memory occupies the boot memory partition, FF2080–FF7FFH. After reset, the default chip-

select line (CS0#) is active; the first instruction fetch is from FF2080H.

PRELIMINARY

13

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