20-668-0011 Rabbit Semiconductor, 20-668-0011 Datasheet - Page 193

• Manufacturer Part Number: 20-668-0011
• Description: IC MPU RABIT3000A 55.5MHZ128LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 20-668-0011

• Processor Type: Rabbit 3000 8-Bit
• Speed: 55.5MHz
• Voltage: 2.5V, 2.7V, 3V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 128-LQFP
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 55.5 MHz
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 55 C
• Number Of Programmable I/os: 56
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 316-1061

Chapter 21 Quadrature Decoder
Bit(s)
Bit(s)
Bit(s)
* Introduced with Rabbit 3000A chip
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
1
0
*
Disable Quadrature Decoder 2 inputs. Writing a new value to these bits will not
cause Quadrature Decoder 2 to increment or decrement.
This bit combination is reserved and should not be used.
Quadrature Decoder 2 inputs from PF2 and PF3.
Quadrature Decoder 2 inputs from PF6 and PF7.
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.
This bit combination is reserved and should not be used.
Quadrature Decoder 1 inputs from PF0 and PF1.
Quadrature Decoder 1 inputs from PF4 and PF5.
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)
(QDC2R)
(QDC1R)
(QDCR)
Description
Description
Description
(Address = 0x0091)
(Address = 0x0094)
(Address = 0x0096)
(Address = 0x0095)
(Address = 0x0097)
183