HT6221A HOLTEK [Holtek Semiconductor Inc], HT6221A Datasheet - Page 7

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

Table 4: K1~K64 single-key data code table
Rev. 1.10
Note: D7 is defined by an external switch
Values of the data codes (D0~D7)
The HT6220A/HT6221A/HT6221B/HT6222A contain
30, 32, 48 and 64 active keys, respectively. Each key
corresponds to a data code. For tape deck recording,
the HT6221A/HT6221B/HT6222A provide three dou-
ble-key functions. The double-key, single-key, and
double-key operation rules are shown in Table 3, Ta-
ble 4, Timing 4, Timing 5 and Timing 6.
KEY
K29
K30
K31
K32
D7=0 : connect to VDD
D7=1 : connect to VSS
K10
K11
K12
K13
K14
K15
K16
K17
K18
K19
K20
K21
K22
K23
K24
K25
K26
K27
K28
K1
K2
K3
K4
K5
K6
K7
K8
K9
Data Codes
0000 000
1000 000
0100 000
1100 000
0010 000
1010 000
0110 000
1110 000
0001 000
1001 000
0101 000
1101 000
0011 000
1011 000
0111 000
1111 000
0000 100
1000 100
0100 100
1100 100
0010 100
1010 100
0110 100
1110 100
0001 100
1001 100
0101 100
1101 100
0011 100
1011 100
0111 100
1111 100
D0~D6
Data Code
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
D7
HT6220A/HT6221A/HT6221B/HT6222A
7
Table 3: Double-key data code table
KEY
K33
K34
K35
K36
K37
K38
K39
K40
K41
K42
K43
K44
K45
K46
K47
K48
K49
K50
K51
K52
K53
K54
K55
K56
K57
K58
K59
K60
K61
K62
K63
K64
Note: D7 is defined by an external switch
K21 + K22
K21 + K23
K21 + K24
KEY
Data Codes
0000 001
1000 001
0100 001
1100 001
0010 001
1010 001
0110 001
1110 001
0001 001
1001 001
0101 001
1101 001
0011 001
1011 001
0111 001
1111 001
0000 101
1000 101
0100 101
1100 101
0010 101
1010 101
0110 101
1110 101
0001 101
1001 101
0101 101
1101 101
0011 101
1011 101
0111 101
1111 101
Data Codes
D0~D6
1010110
0110110
1110110
D0~D6
Data Code D7
Data Code
June 1, 2010
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
D7
0/1
0/1
0/1