C8051F709-GQR Silicon Labs, C8051F709-GQR Datasheet - Page 95

• Manufacturer Part Number: C8051F709-GQR
• Description: 8-bit Microcontrollers - MCU 8kB 32B EEPROM Cap Sense
• Manufacturer: Silicon Labs

Specifications of C8051F709-GQR

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit

SFR Definition 15.11. CS0MD2: Capacitive Sense Mode 2
SFR Address = 0xBE; SFR Page = F
Name
Reset
Bit
7:6
5:3
2:0
Type
Bit
CS0CR[1:0]
CS0DT[2:0]
CS0IA[2:0]
Name
7
0
CS0CR[1:0]
R/W
CS0 Conversion Rate.
These bits control the conversion rate of the CS0 module. See the electrical spec-
ifications table for specific timing.
00: Conversions last 12 internal CS0 clocks and are 12 bits in length.
01: Conversions last 13 internal CS0 clocks and are 13 bits in length.
10: Conversions last 14 internal CS0 clocks and are 14 bits in length.
11: Conversions last 16 internal CS0 clocks.and are 16 bits in length.
CS0 Discharge Time.
These bits adjust the primary CS0 reset time. For most touch-sensitive switches,
the default (fastest) value is sufficient, and these bits should not be modified.
000: Discharge time is 0.75 µs (recommended for most switches)
001: Discharge time is 1.0 µs
010: Discharge time is 1.2 µs
011: Discharge time is 1.5 µs
100: Discharge time is 2 µs
101: Discharge time is 3 µs
110: Discharge time is 6 µs
111: Discharge time is 12 µs
CS0 Output Current Adjustment.
These bits allow the user to adjust the output current used to charge up the capac-
itive sensor element. For most touch-sensitive switches, the default (highest) cur-
rent is sufficient, and these bits should not be modified.
000: Full Current (recommended for most switches)
001: 1/8 Current
010: 1/4 Current
011: 3/8 Current
100: 1/2 Current
101: 5/8 Current
110: 3/4 Current
111: 7/8 Current
6
1
5
0
CS0DT[2:0]
R/W
Rev. 1.0
4
0
Description
3
0
C8051F70x/71x
2
0
CS0IA[2:0]
R/W
1
0
0
0
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