STMPE812ABJR STMicroelectronics, STMPE812ABJR Datasheet - Page 35

• Manufacturer Part Number: STMPE812ABJR
• Description: Touch Screen Converters & Controllers Touchscreen cntrlr S-Touch
• Manufacturer: STMicroelectronics
• Type: Resistive Touch Controllersr

Specifications of STMPE812ABJR

• Rohs: yes
• Input Type: 1 TSC
• Data Rate: 400 kbps
• Resolution: 12 bit
• Interface Type: 4-wire, I2C
• Supply Voltage: 1.65 V to 3.6 V
• Supply Current: 100 uA
• Operating Temperature: - 40 C to + 85 C
• Package / Case: CSP-12
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 1.65 V

STMPE812A
TSC detect config
Address:
Type:
Reset:
Description:
7
1
PenStrength[1:0]
[7:6] PenStrength[1:0]
[5:3] TDetDly[2:0]
[2:0] Settling[2:0]
6
0
0x41
R/W
0xA4
Touchscreen controller detection configuration 1 register.
Pen detect strength threshold
‘00’ – least sensitive (50 K pull-up)
‘01’ – sensitive (40 K pull-up)
‘10’ – more sensitive (30 K pull-up) - Default
‘11’ – most sensitive (20 K pull-up)
Touch detect delay
‘000’ = 40 µs
‘001’ = 80 µs
‘010’ = 160 µs
‘011’ = 320 µs
‘100’ = 640 µs - Default
‘101’ = 1.28 ms
‘110’ = 2.56 ms
‘111’ = 5.12 ms
Panel driver settling time
‘000’ = 40 µs
‘001’ = 80 µs
‘010’ = 160 µs
‘011’ = 320 µs/ns
‘100’ = 640 µs - Default
‘101’ = 1.28 ms
‘110’ = 2.56 ms
‘111’ = 5.12 ms
For large panels (> 6 inches), a capacitor of 10 nF is recommended at the touchscreen
terminals for noise filtering. In this case, settling time of 1 ms or more is recommended.
5
1
TDetDly[2:0]
4
0
Doc ID 18225 Rev 4
3
0
TSC detection configuration 1 register
2
1
Settling[2:0]
Touchscreen controller
1
0
0
0
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