w65c265s Western Design Center, Inc., w65c265s Datasheet - Page 22

• Manufacturer Part Number: w65c265s
• Description: W65c265s 16?bit Microcontroller
• Manufacturer: Western Design Center, Inc.

Note 2.
Note 1.
Note 4.
Note 3.
addresses used by same. CS0B and CS1B address space never appears in CS2B, CS4B or
When on-chip ROM, CS3B and/or CS4B are enabled, then CS5B decode is reduced by the
When on-chip 8K bytes of ROM are enabled, addresses (00)E000-FFFF will not appear in
CS0B is inactive when 00DF00-00DF07 are used for internal I/O register select (BCR0=0)
Select
CS4B chip select decode. On Chip addresses (00)DF00-DFFF never appear in CS4B or
CS7B
CS6B
CS5B
CS4B
CS3B
CS2B
CS1B
CS0B
when (BCR0=1) external memory bus is enabled CS0B is active for addresses 00DF00-
When SSCR2 is "1" (external RAM), then CS3B is active for addresses (00)0000-7FFF.
Chip
When SSCR2 is "0" (internal RAM), then CS3B is active for addresses(00)0200-7FFF.
24320
32256
Block
8192
7936
Size
256
512
4M
8M
4M
64
16
32
16
64
32
8
8
Table 1-5 System Memory Map
(00)DF80-DFBF
(00)DFC0-DFFF
(00)DF70-DF7F
(00)DF50-DF6F
(00)DF40-DF4F
(00)DF00-DF1F
(00)8000-DEFF
(00)E000-FEFF
(00)DF20-DF27
(00)DF00-DF07
(00)E000-FFFF
(00)FF00-FFFF
(00)0200-7FFF
(00)0000-01FF
CS5B chip select decode.
Address
(C0-FF)
(40-BF)
(00-3F)
Range
CS5B decoded space.
00DF1F.
Port replacement & Expansion (Note 4)
On-chip Comm. Registers
On-chip Control Registers
On-chip Interrupt Vectors
On-chip Timer Registers
COProcessor expansion
Cache Memory (Note 3)
ROM Memory (Note 1)
ROM Memory (Note 1)
On-chip I/O Registers
On-chip I/O Registers
Memory (Note 2)
On-chip ROM
User Memory
User Memory
On-chip RAM
On-chip RAM
Function
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