Cypress PSoC CY8CTMG20 Series, Technical Reference Manual

Page: 277 / 308

PSoC CY8CTMG20x and CY8CTST200 TRM, Document No. 001-53603 Rev. *C 277
ECO_CFG
1,E1h
21.4.18 ECO_CFG
External Oscillator Trim Configuration Register
This register provides ECO status and control information.
In the table above, note that reserved bits are grayed table cells and are not described in the bit description section below.
Reserved bits must always be written with a value of ‘0’. For additional information, refer to the
ECO_CFG Register on
page 71 in the External Crystal Oscillator chapter.
2 ECO_LPM This bit enables the ECO lower power mode.
1 ECO_EXW This is a status bit that indicates that the ECO_EX bit was previously written to.
When this bit is a '1', this indicates that the ECO_CONFIG register was written to and is now locked.
When this bit is a '0', the register was not written to since the last reset event.
0 ECO_EX The ECO Exists bit is a flag to the hardware indicating that an external crystal oscillator exists in the
system.If the bit is '0', a switch-over to the ECO is locked out by hardware. If the bit is '1', hardware
allows the firmware to freely switch between the ECO and ILO. It must be written as early as possible
after a Power On Reset (POR) or External Reset (XRES) event.
Individual Register Names and Addresses:
1,E1h
ECO_CFG : 1,E1h
7 6 5 4 3 2 1 0
Access : POR RW : 0 RW : 0 RW : 0
Bit Name ECO_LPM ECO_EXW ECO_EX
Bits Name Description
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