20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 72

• Manufacturer Part Number: 20-668-0024
• Description: IC CPU RABBIT4000 128-LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 20-668-0024

• Processor Type: Rabbit 4000 8-bit
• Speed: 60MHz
• Voltage: 2.5V, 2.7V, 3V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 128-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Other names: 20-668-0022; 316-1078

62
Bit(s)
Bit(s)
Bit(s)
Write-Protect Segment x High Register
7:1
7:0
7
6
5
4
3
2
1
0
0
Stack Limit Control Register
Stack Low Limit Register
Value
Value
Value
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Disable 4K write protect for physical address 0xF000–0xFFFF in WP Segment x.
Enable 4K write protect for physical address 0xF000–0xFFFF in WP Segment x.
Disable 4K write protect for physical address 0xE000–0xEFFF in WP Segment x.
Enable 4K write protect for physical address 0xE000–0xEFFF in WP Segment x.
Disable 4K write protect for physical address 0xD000–0xDFFF in WP Segment x.
Enable 4K write protect for physical address 0xD000–0xDFFF in WP Segment x.
Disable 4K write protect for physical address 0xC000–0xCFFF in WP Segment x.
Enable 4K write protect for physical address 0xC000–0xCFFF in WP Segment x.
Disable 4K write protect for physical address 0xB000–0xBFFF in WP Segment x.
Enable 4K write protect for physical address 0xB000–0xBFFF in WP Segment x.
Disable 4K write protect for physical address 0xA000–0xAFFF in WP Segment x.
Enable 4K write protect for physical address 0xA000–0xAFFF in WP Segment x.
Disable 4K write protect for physical address 0x9000–0x9FFF in WP Segment x.
Enable 4K write protect for physical address 0x9000–0x9FFF in WP Segment x.
Disable 4K write protect for physical address 0x8000–0x8FFF in WP Segment x.
Enable 4K write protect for physical address 0x8000–0x8FFF in WP Segment x.
These bits are reserved and should be written with zeros.
Disable stack-limit checking.
Enable stack-limit checking.
Lower limit for stack-limit checking. If a stack operation or stack-relative
memory access is attempted at an address less than {STKLLR, 0x10}, a stack-
limit violation interrupt is generated.
(WPSAHR)
(WPSBHR)
(STKLLR)
(STKCR)
Description
Description
Description
Rabbit 4000 Microprocessor User’s Manual
(Address = 0x0482)
(Address = 0x0486)
(Address = 0x0444)
(Address = 0x0445)