20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 309

• 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

Chapter 27 System/User Mode
Bit(s)
Bit(s)
6:0
7:6
5:1
7
0
Serial Port F User Enable Register
Enable Dual-Mode Register
Value
Value
00
01
10
11
0
1
0
1
Disable User Mode access to Serial Port F (I/O addresses 0x00D8–0x00DF).
Enable User Mode access to Serial Port F (I/O addresses 0x00D8–0x00DF).
These bits are reserved and should be written with zeros.
Default (Rabbit 2000/3000) instruction set.
This bit combination is reserved and must not be used.
This bit combination is reserved and must not be used.
Enhanced (Rabbit 4000) instruction set.
These bits are reserved and should be written with zeros.
Normal (System Mode only) operation.
Enable System/Normal operation.
(SFUER)
(EDMR)
Description
Description
(Address = 0x03D8)
(Address = 0x0420)
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