sx8654 Semtech Corporation, sx8654 Datasheet - Page 55

• Manufacturer Part Number: sx8654
• Description: Haptics Enabled 4/5-wire Resistive Touchscreen Controller With Proximity Sensing
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
Bits
7:0
Bits
Bits
7:4
3:0
Bits
Bits
Bits
Rev 1 – 25
6:4
3:1
7:6
5:3
2:0
7:0
7:0
7
0
Variable
PROXOFFSETLSB
Variable
Reserved
PROXSENSITIVITY
PROXFREQ
Reserved
Variable
PROXSENSORCON
PROXSHIELDCON
Variable
Reserved
PROXBOOST
Reserved
Variable
Reserved
Variable
Reserved
th
July 2011
Default
Default
Default
Default
Default
Default
0x00
0000
0000
0x01
0x00
000
000
000
000
00
0
0
Table 40 : RegProx17 (Addr 0x1C)
Table 41 : RegProx18 (Addr 0x1D)
Table 42 : RegProx19 (Addr 0x1E)
Table 43 : RegProx20 (Addr 0x1F)
Table 44 : RegProx21 (Addr 0x20)
Table 45 : RegProx22 (Addr 0x21)
Description
Provides the proximity compensation offset information for monitoring
purposes. Read-only (using PROXCONVDONE), do not write.
Description
Defines the sensitivity :
000 : 0 (Min)
001 : 1
010 : 2
011 : 3
100 : 4
101 : 5
110 : 6
111 : 7 (Max)
Defines the operating frequency :
010 : 64 kHz
011 : 90 kHz
100 : 112 kHz
101 : 150 kHz (recommended)
Else : Reserved
Description
Defines the proximity sensor connection, Cf. § 5.1 :
0000 : None
0001 : AUX1/WIPER (5-wire TS)
0010 : AUX2 (external)
1000 : X (standard 4-wire TS)
1001 : Y (inverted 4-wire TS)
Else : Reserved
Defines the proximity shield connection, Cf. § 5.1 :
0000 : None
0011 : AUX3 (external)
1000 : X (inverted 4-wire TS)
1001 : Y (standard 4-wire TS or 5-wire TS)
Else : Reserved
Description
Enables proximity boost mode (higher sensitivity) :
100 : ON
110 : OFF (recommended; compulsory when sensor is TS)
Else : Reserved
Must be set to 100.
Description
Must be set to 0x81.
Description
Resistive Touchscreen Controller with Proximity Sensing
55
SX8654/SX8655/SX8656
Haptics Enabled 4/5-Wire
www.semtech.com