HT6221A 데이터 시트보기 (PDF) - Holtek Semiconductor
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HT6221A Datasheet PDF : 19 Pages
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HT6220A/HT6221A/HT6221B/HT6222A
· 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.
Table 3: Double-key data code table
KEY
Data Codes
D0~D6
Data Code D7
K21 + K22
1010110
0/1
K21 + K23
0110110
0/1
K21 + K24
1110110
0/1
Note: D7 is defined by an external switch
Table 4: K1~K64 single-key data code table
KEY
Data Codes
D0~D6
Data Code
D7
K1
0000 000
0/1
K2
1000 000
0/1
K3
0100 000
0/1
K4
1100 000
0/1
K5
0010 000
0/1
K6
1010 000
0/1
K7
0110 000
0/1
K8
1110 000
0/1
K9
0001 000
0/1
K10
1001 000
0/1
K11
0101 000
0/1
K12
1101 000
0/1
K13
0011 000
0/1
K14
1011 000
0/1
K15
0111 000
0/1
K16
1111 000
0/1
K17
0000 100
0/1
K18
1000 100
0/1
K19
0100 100
0/1
K20
1100 100
0/1
K21
0010 100
0/1
K22
1010 100
0/1
K23
0110 100
0/1
K24
1110 100
0/1
K25
0001 100
0/1
K26
1001 100
0/1
K27
0101 100
0/1
K28
1101 100
0/1
K29
0011 100
0/1
K30
1011 100
0/1
K31
0111 100
0/1
K32
1111 100
0/1
Note: D7 is defined by an external switch
D7=0 : connect to VDD
D7=1 : connect to VSS
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
Data Codes
D0~D6
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 Code
D7
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
Rev. 1.10
7
June 1, 2010
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