cy8c3446lti-075es2 Cypress Semiconductor Corporation., cy8c3446lti-075es2 Datasheet - Page 21

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

32. VIDAC0 Operation
January 7, 2011
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PROBLEM DEFINITION
VIDAC0 does not operate correctly when its output is greater than 2.4 V in either voltage or current mode.
PARAMETERS AFFECTED
TRIGGER CONDITION(S)
Use of VIDAC0 with an output voltage greater than 2.4 V.
SCOPE OF IMPACT
Output of VIDAC0 does not meet specifications and cannot output a voltage greater than 2.4 V. VDAC1,
VDAC2, and VDAC3 are not affected.
WORKAROUND
Two workarounds are possible:
1. Do not use any VDACs or IDACs whose output voltage can exceed 2.4 V.
2. If one or more VDACs or IDACs must be used with outputs exceeding 2.4 V, several user steps are
FIX STATUS
Silicon revision fix confirmed in production silicon.
required to determine if they are placed into VIDAC0 and must be moved to other VIDAC hardware if
required.
a) After each build of the project, open the report file (*.rpt) located in the Results tab of the Workspace
b) Expand the 'Analog component placement' branch in the *.rpt file and look for a line that begins with
c) If a line beginning with VIDAC[0] such as "VIDAC[0]@[Chip=0][FFB(VIDAC,0)]: \VDAC8_1:viDAC8\
d) If the component with this instance name does require an output greater than 2.4 V, copy the full
e) Open the projects design wide resource (*.cydwr) file and open the directives tab. Click the add
f)
g) In the "Directive Type" column select "ForceComponentFixed"
h) In the "Directive Value" column type in the following text "f(vidac,1)" where the numeric parameter is
i)
Explorer of PSoC Creator
VIDAC[0]. If no line begins with VIDAC[0], the errata workaround is complete because VIDAC0 was
not used in the design
(fixed)" is present, examine the component instance name (VDAC8_1 in this example). If the
component with this instance name does not experience an output voltage greater than 2.4 V the
errata workaround is complete
instance name with slashes (example: \VDAC8_1:viDAC8\)
directive icon
Paste the full instance name copied from the report file into the "Component (Signal) Name” column
the VIDAC resource to use (VIDAC1 in this example). This directive forces the component to be placed
into a specific VIDAC hardware resource
Several iterations may be required to ensure no VDACs or IDACs are placed in VIDAC0 with outputs
greater than 2.4 V
Document Number: 001-61136 Rev. *C
Errata Document
PSoC
®
3: CY8C34 Family
21
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