20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 304

• 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

27.4 Register Descriptions
294
Bit(s)
Bit(s)
Bit(s)
Bit(s)
Bit(s)
Real-Time Clock User Enable Register
6:0
6:0
6:0
6:0
6:0
7
7
Parallel Port A User Enable Register
7
Parallel Port B User Enable Register
7
Parallel Port C User Enable Register
7
Slave Port User Enable Register
Value
Value
Value
Value
Value
0
1
0
1
0
1
0
1
0
1
Disable User Mode access to the RTC (I/O addresses 0x0002–0x0007).
Enable User Mode access to the RTC (I/O addresses 0x0002–0x0007).
These bits are reserved and should be written with zeros.
Disable User Mode access to the slave port (I/O addresses 0x0020–0x0027).
Enable User Mode access to the slave port (I/O addresses 0x0020–0x0027).
These bits are reserved and should be written with zeros.
Disable User Mode access to Parallel Port A (I/O addresses 0x0030–0x0037).
Enable User Mode access to Parallel Port A (I/O addresses 0x0030–0x0037).
These bits are reserved and should be written with zeros.
Disable User Mode access to Parallel Port B (I/O addresses 0x0040–0x0047).
Enable User Mode access to Parallel Port B (I/O addresses 0x0040–0x0047).
These bits are reserved and should be written with zeros.
Disable User Mode access to Parallel Port C (I/O addresses 0x0050–0x0055).
Enable User Mode access to Parallel Port C (I/O addresses 0x0050–0x0055).
These bits are reserved and should be written with zeros.
(PBUER)
(PCUER)
(RTUER)
(SPUER)
(PAUER)
Description
Description
Description
Description
Description
Rabbit 4000 Microprocessor User’s Manual
(Address = 0x0300)
(Address = 0x0320)
(Address = 0x0330)
(Address = 0x0340)
(Address = 0x0350)