20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 247

• 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 22 Quadrature Decoder
Bit(s)
Bit(s)
Bit(s)
7:6
3:2
1:0
7:0
7:2
1:0
5
4
Quad Decode Count High Register
Quad Decode Control Register
Quad Decode Count Register
Value
Value
Value
read
read
read
00
01
10
11
00
01
10
11
00
01
10
11
0
1
Disable Quadrature Decoder 2 inputs. Writing a new value to these bits will not
cause Quadrature Decoder 2 to increment or decrement.
Quadrature Decoder 2 inputs from Parallel Port D bits 3 and 2.
Quadrature Decoder 2 inputs from Parallel Port E bits 3 and 2.
Quadrature Decoder 2 inputs from Parallel Port E bits 7 and 6.
Eight bit quadrature decoder counters (both channels).
Ten bit quadrature decoder counters (both channels).
This bit is reserved and should be written as zero.
Disable Quadrature Decoder 1 inputs. Writing a new value to these bits will not
cause Quadrature Decoder 1 to increment or decrement.
Quadrature Decoder 1 inputs from Parallel Port D bits 1 and 0.
Quadrature Decoder 1 inputs from Parallel Port E bits 1 and 0.
Quadrature Decoder 1 inputs from Parallel Port E bits 5 and 4.
Quadrature Decoder interrupts are disabled.
Quadrature Decoder interrupt use Interrupt Priority 1.
Quadrature Decoder interrupt use Interrupt Priority 2.
Quadrature Decoder interrupt use Interrupt Priority 3.
The current value of bits 7-0 of the Quadrature Decoder counter is reported.
These bits are reserved and will always read as zeros.
The current value of bits 9-8 of the Quadrature Decoder counter is reported.
(QDC1HR)
(QDC2HR)
(QDC1R)
(QDC2R)
(QDCR)
Description
Description
Description
(Address = 0x0091)
(Address = 0x0094)
(Address = 0x0096)
(Address = 0x0095)
(Address = 0x0097)
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