20-101-0522 Rabbit Semiconductor, 20-101-0522 Datasheet - Page 89

• Manufacturer Part Number: 20-101-0522
• Description: MODULE RABBITCORE RCM3220
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-0522

• Module/board Type: MPU Core Module
• Product: Microcontroller Modules
• Core Processor: Rabbit 3000
• Clock Speed: 44.2 MHz
• Interface Type: Ethernet, Serial
• Flash: 512 KB
• Timers: 10 x 8 bit, 1 x 10 bit
• Operating Supply Voltage: 3.15 V to 3.45 V
• Board Size: 69 mm x 47 mm x 22 mm
• Core: RCM3220
• Processor Series: RCM3200
• For Use With/related Products: RCM3220
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1098

The Quadrature Decoder generates an interrupt when the counter increments from 0x00 to
0x01 or when the counter decrements from 0x00 to 0xFF. Note that the status bits in the
QDCSR are set coincident with the interrupt, and the interrupt (and status bits) are cleared
by reading the QDCSR.
User’s Manual
Quad Decode Control/Status
Register
7
(rd-only)
6
(rd-only)
5
4
(wr-only)
3
(rd-only)
2
(rd-only)
1
0
(wr-only)
Register Name
Bit
Bit
Table F-5. Quadrature Decoder Registers
QDCSR
0
1
0
1
0
0
1
0
1
0
1
0
0
1
Mnemonic
Value
Value
10010000 (0x90)
Quadrature Decoder 2 did not increment from 0xFF.
Quadrature Decoder 2 incremented from 0xFF to
0x00. This bit is cleared by a read of this register.
Quadrature Decoder 2 did not decrement from 0x00.
Quadrature Decoder 2 decremented from 0x00 to
0xFF. 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 0x00, without
causing an interrupt.
Quadrature Decoder 1 did not increment from 0xFF.
Quadrature Decoder 1 incremented from 0xFF to
0x00. This bit is cleared by a read of this register.
Quadrature Decoder 1 did not decrement from 0x00.
Quadrature Decoder 1 decremented from 0x00 to
0xFF. 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 0x00, without
causing an interrupt.
Description
Description
Address
85