cy8c3446lti-075es2 Cypress Semiconductor Corporation., cy8c3446lti-075es2 Datasheet - Page 20

• Manufacturer Part Number: cy8c3446lti-075es2
• Description: Psoc? 3 Cy8c34 Family Errata Silicon Revision Es2
• Manufacturer: Cypress Semiconductor Corporation.

29. Segment LCD Vddio Restriction
30. Analog Connectivity
31. Analog Routing
January 7, 2011
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PROBLEM DEFINITION
If segment LCD drive is enabled, then all Vddio supplies must be greater than or equal to the LCD bias voltage
(Vbias = V0).
PARAMETERS AFFECTED
NA
TRIGGER CONDITION(S)
Vddio0, Vddio1, Vddio2, or Vddio3 less than LCD bias (Vbias) when segment LCD drive is enabled.
SCOPE OF IMPACT
If a Vddio supply is less than the LCD bias voltage (Vbias), the LCD bias voltage will be clamped to the lowest
Vddio supply voltage.
WORKAROUND
Ensure all Vddio supplies are  LCD bias (Vbias). If the application requires digital pins to be driven to a voltage
less than Vbias, the SIO pins can be used in regulated output mode and GPIO pins can be configured for open
drain, drives low mode, and driven high with a pull-up to the required voltage.
FIX STATUS
Silicon revision fix confirmed in production silicon.
PROBLEM DEFINITION
Vbat, Vddd, and Vdda are not directly routable to analog globals.
PARAMETERS AFFECTED
NA
TRIGGER CONDITION(S)
NA
SCOPE OF IMPACT
NA
WORKAROUND
Connect the supply rail to be measured to a GPIO and then route that I/O to an analog global. The supply rail
to be measured must be less than or equal to the GPIO pins VDDIO supply.
FIX STATUS
Silicon revision fix confirmed in production silicon.
PROBLEM DEFINITION
The SC/CT hardware blocks have reversed input connections. This issue only applies when performing
manual analog routing with direct register writes.
PARAMETERS AFFECTED
NA
TRIGGER CONDITION(S)
NA
WORKAROUND
Use PSoC Creator to route these hardware modules. PSoC Creator currently implements the required
workaround. No user intervention is required.
FIX STATUS
Silicon revision fix confirmed in production silicon.
Document Number: 001-61136 Rev. *C
Errata Document
PSoC
®
3: CY8C34 Family
20
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