HT6221A HOLTEK [Holtek Semiconductor Inc], HT6221A Datasheet - Page 2

• Manufacturer Part Number: HT6221A
• Description: Multi-Purpose Encoders
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

Pin Assignment
Pin Description
HT6222A
Approximate Internal Connection Circuits
Rev. 1.10
Pin No.
1~6
7
8
9
10, 11
12
13
14~21
22
23~24
Pin Name
R3~R8
DOUT
VDD
D7
NC
VSS
LED
C8~C1
AIN
R1~R2
I/O
I/O
O
O
I
I
I
I
CMOS IN/OUT, Pull-low Column control for keyboard matrix
Internal Connection
CMOS IN, Pull-high
CMOS IN, Pull-low
CMOS IN, Pull-low
NMOS OUT
CMOS OUT
CMOS IN
Pull-low
HT6220A/HT6221A/HT6221B/HT6222A
2
Row control for keyboard matrix, active high
Serial data output pin, with a 38kHz carrier
Positive power supply, 2.0V~3.6V for normal operation
Most significant data bit (D7) code setting
No connection
Negative power supply, ground
Transmission enable indicator output
Low byte address codes (8 bits) scan input
Row control for keyboard matrix, active high
Description
June 1, 2010