20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 66

• 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

56
Bit(s)
Bit(s)
7:5
4:3
2:0
7:4
3
2
1
0
Memory Timing Control Register
MMU Expanded Code Register
Value
Value
000
001
010
100
101
000
001
010
100
101
011
110
111
011
110
111
0
1
0
1
0
1
0
1
Bank select address is A[19:18].
Bank select address is A[20:19].
Bank select address is A[21:20].
Bank select address is A[22:21].
Bank select address is A[23:22].
This bit combination is reserved and should not be used.
This bit combination is reserved and should not be used.
Bank select address is A[18:17].
These bits are reserved and should be written with zeros. Read returns zeros.
Normal operation.
This bit combination is reserved and should not be used.
This bit combination is reserved and should not be used.
This bit combination is reserved and should not be used.
For an XPC access, use MB0CR independent of bank select address.
For an XPC access, use MB1CR independent of bank select address.
For an XPC access, use MB2CR independent of bank select address.
For an XPC access, use MB3CR independent of bank select address.
These bits are reserved and should be written with zeros.
Normal timing for /OE1 (rising edge to rising edge, one clock minimum).
Extended timing for /OE1 (one-half clock earlier than normal).
Normal timing for /OE0 (rising edge to rising edge, one clock minimum).
Extended timing for /OE0 (one-half clock earlier than normal).
Normal timing for /WE1 (rising edge to falling edge, one and one-half clocks
minimum).
Extended timing for /WE1 (falling edge to falling edge, two clocks minimum).
Normal timing for /WE0 (rising edge to falling edge, one and one-half clocks
minimum).
Extended timing for /WE0 (falling edge to falling edge, two clocks minimum).
(MECR)
(MTCR)
Description
Description
Rabbit 4000 Microprocessor User’s Manual
(Address = 0x0018)
(Address = 0x0019)