CY8C20X34 CYPRESS [Cypress Semiconductor], CY8C20X34 Datasheet - Page 180

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

IDAC_D
20.3.39 IDAC_D
This register specifies the 8-bit multiplying factor that determines the output IDAC current.
For additional information, refer to the
Bits
7:0
180
Individual Register Names and Addresses:
IDAC_D : 0,FDh
Access : POR
Bit Name
0,FDh
IDACDATA[7:0]
Name
Current DAC Data Register
7
6
Description
This register is also used to set the charging current in the proximity detect mode.
Step size is approximately 330 nA/bit for default IRANGE state 00b.
00h
.
.
.
FFh
Eight-bit value that selects the number of current units which combine to form the IDAC current. This
current then drives the analog mux bus when IDAC mode is enabled. For example, a setting of 80h
means that the charging current will be 128 current units.
The current size also depends on the IRANGE setting in the CS_CR2 register. This setting supplies
the charging current for the relaxation oscillator. This current and the external capacitance connected
to the analog global bus determines the RO frequency.
Register Definitions on page 76
Smallest current (nominally zero unless IBOOST bit is set in the CS_CR3 register).
Largest current
5
4
IDACDATA[7:0]
RW : 00
in the CapSense Module chapter.
3
PSoC CY8C20x34 TRM, Version 1.0
2
0,FDh
1
0