DS80C320-ECD DALLAS [Dallas Semiconductor], DS80C320-ECD Datasheet - Page 41

• Manufacturer Part Number: DS80C320-ECD
• Description: High-Speed Microcontroller User Guide
• Manufacturer: DALLAS [Dallas Semiconductor]

ROM Size Select (ROMSIZE)
SFR C2h
Bits 7-3
ROMSIZE.2-0
Bits 2-0
RS2
0
0
0
0
1
1
1
1
RS1
0
0
1
1
0
0
1
1
R=Unrestricted Read, W=Unrestricted Write, -n=Value after Reset
7
-
RS0
0
1
0
1
0
1
0
1
These bits are reserved. Read data is indeterminate.
ROM Size Select 2-0. This register is used to select the maximum on-chip
decoded address for ROM. Care must be taken that the memory location of the
current program counter will be valid both before and after modification. These
bits can only be modified using a timed access procedure. The
override the function of these bits when asserted, forcing the device to access
external program memory only.
exceeds the maximum amount of internal memory may corrupt device operation.
These bits will default on reset to the maximum amount of internal program
memory (i.e., 16K for DS87C520).
0KB/Disable on-chip ROM
1KB/03FFh
2KB/07FFh
4KB/0FFFh
8KB/1FFFh
16KB/3FFFh
132KB/7FFFh
64KB/FFFFh
6
-
5
-
MAXIMUM ON-CHIP ROM ADDRESS
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4
-
Configuring this register to a setting that
3
-
High-Speed Microcontroller User’s Guide
RT-1
RS2
2
RT-0
RS1
1
EA
pin will
RT-1
RS0
0