HCTL-2022 Avago Technologies US Inc., HCTL-2022 Datasheet - Page 18

• Manufacturer Part Number: HCTL-2022
• Description: QUADRATURE DECODER/COUNTER INTER
• Manufacturer: Avago Technologies US Inc.
• Type: Quadrature Decoder/ Counter Interface ICr

Specifications of HCTL-2022

• Package / Case: 20-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Voltage - Supply: 4.5 V ~ 5.5 V
• Applications: Encoder to Microprocessor
• Interface: 8-Bit Tristate
• Maximum Operating Temperature: + 100 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: Q2414340A

Interfacing the HCTL-2032 to an Atmel AVR 90S8535
The circuit shown in Figure 17 shows the connections be-
tween an HCTL-2032 and an Atmel AVR controller. Data
lines D0-D7 are connected to the Atmel AVR bus port.
The 8 MHz oscillators clock the Atmel AVR, whereas the
external 33 MHz oscillators clock the HCTL-2032. Figure
18 illustrates the program that interfaces with an Atmel
AVR 90S8535.

Figure 17. An HCTL-2032-to-Atmel AVR Interface
5
4
3
2
1
5
4
3
2
1
+5v
+5v
CHB
CHA
VCC
CHI
GND
CHB
CHA
VCC
CHI
GND
R
R
R= 2.7kOHM
R= 2.7kOHM
R
R
R
R
CHBX
CHAX
CHIX
CHBY
CHAY
CHIY
HCTL2032
SEL2
RSTX
RSTY
SEL1
EN2
X/Y
EN1
D5
D3
D4
D6
OE
D1
D2
D7
D0
PA5
PB1
PB3
PB0
PA3
PA4
PA6
PB2
PA1
PA2
PA7
PB5
PB6
PA0
PB4
PC7
AT90S8535