20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 246

• 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

22.4 Register Descriptions
236
(Write-
(Write-
(Read-
(Read-
(Read-
(Read-
Bit(s)
only)
only)
only)
only)
only)
only)
Quad Decode Control/Status Register
7
6
5
4
3
2
1
0
Value
0
1
0
1
0
1
0
1
0
1
0
1
Quadrature Decoder 2 did not increment from the maximum count.
Quadrature Decoder 2 incremented from the maximum count to 0x000. This bit
is cleared by a read of his register.
Quadrature Decoder 2 did not decrement from zero.
Quadrature Decoder 2 decremented from zero to the maximum count. This bit is
cleared by a read of this register.
This bit always reads as zero.
No effect on the Quadrature Decoder 2.
Reset Quadrature Decoder 2 to all zeros, without causing an interrupt.
Quadrature Decoder 1 did not increment from the maximum count.
Quadrature Decoder 1 incremented from the maximum count to zero. This bit is
cleared by a read of this register.
Quadrature Decoder 1 did not decrement from zero.
Quadrature Decoder 1 decremented from zero to the maximum count. This bit is
cleared by a read of this register.
This bit always reads as zero.
No effect on the Quadrature Decoder 1.
Reset Quadrature Decoder 1 to all zeros, without causing an interrupt.
(QDCSR)
Description
Rabbit 4000 Microprocessor User’s Manual
(Address = 0x0090)