20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 263

• 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

24.4 Register Descriptions
Chapter 24 External I/O Control
Bit(s)
7:5
2:0
4
3
I/O Handshake Control Register
Value
000
001
010
100
101
011
110
111
0
1
These bits are reserved and should be written with zeros.
I/O handshake is active low (I/O transaction held until signal goes high).
I/O handshake is active high (I/O transaction held until signal goes low).
This bit is reserved and should be written with zero.
Use Parallel Port E bit 0 for I/O handshake.
Use Parallel Port E bit 1 for I/O handshake.
Use Parallel Port E bit 2 for I/O handshake.
Use Parallel Port E bit 3 for I/O handshake.
Use Parallel Port E bit 4 for I/O handshake.
Use Parallel Port E bit 5 for I/O handshake.
Use Parallel Port E bit 6 for I/O handshake.
Use Parallel Port E bit 7 for I/O handshake.
(IHCR)
Description
(Address = 0x0028)
253