668-0010 Rabbit Semiconductor, 668-0010 Datasheet - Page 58
![no-image](/images/no-image-200.jpg)
668-0010
Manufacturer Part Number
668-0010
Description
IC MPU RABIT3000 55.5MHZ 128LQFP
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-668-0011.pdf
(312 pages)
Specifications of 668-0010
Rohs Status
RoHS non-compliant
Processor Type
Rabbit 3000 8-Bit
Speed
55.5MHz
Voltage
2.5V, 2.7V, 3V, 3.3V
Mounting Type
Surface Mount
Package / Case
128-LQFP
Features
-
Other names
316-1016
- Current page: 58 of 312
- Download datasheet (2Mb)
5.4 Register Descriptions
48
Bit(s)
Bit(s)
* This bit is used only on the Rabbit 3000A and later versions; it is reserved and must be written
7:0
7
6
5
4
3
2
1
0
*
with zero on the Rabbit 3000.
MMU Instruction/Data Register
Stack Segment Register
Value
Value
Write
Read
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Internal I/O addresses are decoded using only the lower eight bits of the internal
I/O address bus. This restricts internal I/O addresses to the range 0x0000–
0x00FF.
Internal I/O addresses are decoded using all 15 bits of the address internal I/O
address bus. This option must be selected to access internal I/O addresses of
0x0100 and higher.
This bit is reserved and must be written with zero.
Enable A16 and A19 inversion independent of instruction/data.
Enable A16 and A19 inversion (controlled by bits 0-3) for data accesses only.
This enables the instruction/data split for the separate I and D space.
Normal /CS1 operation.
Force /CS1 always active. This will not cause any conflicts as long as the
memory using /CS1 does not also share an Output Enable or Write Enable with
another memory.
Normal operation.
For a DATASEG access, invert A19 before MBxCR (bank select) decision.
Normal operation.
For a data segment access: invert A16
Normal operation.
For root access, invert A19 before MBxCR (bank select) decision.
Normal operation.
For a root segment access: invert A16
The current contents of this register are reported.
Eight LSBs (MSBs are set to zero by write) of physical address offset to use if
SEGSIZ[7:4] Addr[15:12] < 0xE
(STACKSEG)
(MMIDR)
Description
Description
Rabbit 3000 Microprocessor User’s Manual
(Address = 0x0010)
(Address = 0x0011)
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