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PRELIMINARY
CY8C20111, CY8C20121
Document Number: 001-53516 Rev. **
Page 7 of 34
Table 5. Register Map
Name
Register
Address
(in Hex)
Access
Writable
Only in
Setup
Mode[3]
Factory Default
Values of Registers
(in Hex)
I2C Max ACK
Time in Normal
Mode (ms)[5]
I2C Max
ACK Time in
Setup
Mode
(ms)[5]
Page No.
1 Button
2 Button
OUTPUT_PORT
04
W
01
03
0.10
9
CS_ENABLE
07
RW
Yes
01
03
11
9
DIG_ENABLE
08
RW
Yes
01
03
11
10
SET_STRONG_DM
11
RW
Yes
01
03
11
10
OP_SEL_0
1C
RW
82
82
0.12
11
12
LOGICAL_OPR_INPUT0
1E
RW
01
01
0.12
11
12
OP_SEL_1[4]
21
RW
82
0.12
11
12
LOGICAL_OPR_INPUT1[4]
23
RW
02
0.12
11
12
CS_NOISE_TH
4E
RW
28
28
0.11
11
13
CS_BL_UPD_TH
4F
RW
64
64
0.11
11
13
CS_SETL_TIME
50
RW
Yes
A0
A0
35
13
CS_OTH_SET
51
RW
Yes
00
00
35
14
CS_HYSTERISIS
52
RW
0A
0A
0.11
11
14
CS_DEBOUNCE
53
RW
03
03
0.11
11
15
CS_NEG_NOISE_TH
54
RW
14
14
0.11
11
15
CS_LOW_BL_RST
55
RW
14
14
0.11
11
15
CS_FILTERING
56
RW
20
20
0.11
11
16
CS_SCAN_POS_0
5C
RW
Yes
00
00
11
16
CS_SCAN_POS_1[4]
5D
RW
Yes
01
11
16
CS_FINGER_TH_0
66
RW
64
64
0.14
11
17
CS_FINGER_TH_1[4]
67
RW
64
0.14
11
17
CS_IDAC_0
70
RW
0A
0A
0.14
11
17
CS_IDAC_1[4]
71
RW
0A
0.14
11
17
I2C_ADDR_LOCK
79
RW
00
00
0.11
11
17
DEVICE_ID
7A
R
11
21
0.11
11
18
DEVICE_STATUS
7B
R
03
03
0.11
11
18
I2C_ADDR_DM
7C
RW
00
00
0.11
11
19
CS_READ_BUTTON
81
RW
00
00
0.12
11
19
CS_READ_BLM
82
R
00
00
0.12
11
20
CS_READ_BLL
83
R
00
00
0.12
11
20
CS_READ_DIFFM
84
R
00
00
0.12
11
20
CS_READ_DIFFL
85
R
00
00
0.12
11
20
CS_READ_RAWM
86
R
00
00
0.12
11
20
CS_READ_RAWL
87
R
00
00
0.12
11
20
CS_READ_STATUS
88
R
00
00
0.12
11
21
COMMAND_REG
A0
W
00
00
0.10
11
21
Notes
3. These registers are writable only after entering into setup mode. All other registers are available for read and write in normal and setup mode.
4. These registers are available only in CY8C20121 device.
5. The Ack times specified are 1x I2C Ack times.
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