CY8C20X34 CYPRESS [Cypress Semiconductor], CY8C20X34 Datasheet - Page 156

• Manufacturer Part Number: CY8C20X34
• Description: Technical Reference Manual (TRM)
• Manufacturer: CYPRESS [Cypress Semiconductor]

CS_CR3
20.3.16 CS_CR3
This register contains control bits primarily for the proximity detection algorithm.
For additional information, refer to the
Bit
7
6
5
4
3:2
1:0
156
Individual Register Names and Addresses:
CS_CR3 : 0,A3h
Access : POR
Bit Name
0,A3h
IBOOST
REFMUX
REFMODE
REF_EN
LPFilt[1:0]
LPF_EN[1:0]
Name
CapSense Control Register 3
IBOOST
RW : 0
7
REFMUX
RW : 0
6
Description
0
1
0
1
Bit enables the reference buffer to drive the analog global bus.
1
Low pass filter approximate time constant
10b
11b
Enable for the low pass filter
Bit adds a fixed boost current to the IDAC output. This affects all functions using the IDAC, such as
the relaxation oscillator. The boost size is approximately equal to 200 (decimal) counts of the IDAC_D
register.
0
1
Bit selects the reference voltage for the input of the reference buffer.
Bit allows manual connection of the reference buffer output to the analog global bus. If either
CI_EN=1 or RO_EN=1 in the CS_CR2 register, this bit has no effect (reference buffer connection is
off or controlled by other settings).
0
00b
01b
00b
01b
10b
11b
Register Definitions on page 76
No boost current
Boost current is added to IDAC output.
Select REFHI (1.8V)
Select VREF (1.3V)
No connection
Reference buffer connected to the analog global bus.
Reference buffer is disabled, powered down.
Reference buffer is enabled. Connection to the analog global bus is controlled by the REF-
MODE bit in this register, and by the CI_EN and RO_EN bits in the CS_CR2 register.
1 µ s
2 µ s
5 µ s
10 µ s
No connection of either comparator channel to low pass filter
Connect comparator channel 0 through the low pass filter
Connect comparator channel 1 through the low pass filter
Connect both comparator channel inputs together, and through the low pass filter
REFMODE
RW : 0
5
REF_EN
RW : 0
4
in the CapSense Module chapter .
3
LPFilt[1:0]
RW : 0
PSoC CY8C20x34 TRM, Version 1.0
2
1
LPF_EN[1:0]
RW : 0
0,A3h
0