cy8c3446lti-075es2 Cypress Semiconductor Corporation., cy8c3446lti-075es2 Datasheet - Page 16

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

22. Analog Low Power Routing
23. SWD Clock
January 7, 2011
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PROBLEM DEFINITION
Placing the device into sleep or hibernate mode, calling Stop() APIs for the DeltaSigma ADC, or not calling
Start() APIs for the DeltaSigma ADC component causes the analog components connections to the analog
global to lose their high impedance state and can cause undesirable shorts of the analog routing to either
GND, Vdd, or to each other. This issue affects the Comparator, VIDAC, SC/CT, and DeltaSigma Modulator
ADC (DSM). This issue affects both direct connections to analog resources and analog routing which use the
DSM for track jumping.
PARAMETERS AFFECTED
NA
TRIGGER CONDITION(S)
Placing the device into sleep or hibernate modes, calling Stop() API's for the DeltaSigma ADC, or not calling
Start() API for DeltaSigma ADC.
SCOPE OF IMPACT
Depending on the analog component, the result can consist of the analog global shorting together, shorting
to GND, or shorting to Vdda. This may impact external circuitry attached to the affected blocks and have an
effect on analog accuracy. The impact of the issue is application dependent.
WORKAROUND
There are two possible workarounds:
1. Do not use sleep or hibernate mode on the device and place then enable the DeltaSigma ADC of the
2. If sleep or hibernate mode is required, place analog mux components in PSoC Creator in-between the
FIX STATUS
Silicon revision fix confirmed in production silicon.
PROBLEM DEFINITION
When using SWD via the USBIO to acquire, program, or debug the device, the P1[1] SWDCK pin must be
pulled to ground when using the USB SWDCK pin (P15[7]).
PARAMETERS AFFECTED
NA
TRIGGER CONDITION(S)
The SWDCK pin on P1[1] in a high logic state.
SCOPE OF IMPACT
SWD clock will not be seen by SWD interface on device.
WORKAROUND
Ensure that the P1[1] SWDCK pin is pulled to ground when using the USBIO for SWD. The easiest method
is to tie the P1[1] SWDCK pin to ground with a 100 K resistor.
FIX STATUS
Silicon revision fix confirmed in production silicon.
device to avoid shorting of the analog globals. This prevents the analog router from using the DeltaSigma
ADC inputs for track jumping of other analog resources..
analog pins and the connections to the analog components. The analog mux connections must be made
directly to the analog component inputs. Before entering a low power mode, disconnect the inputs from
the components using the analog mux to prevent the affected components from affecting the design.
Document Number: 001-61136 Rev. *C
Errata Document
PSoC
®
3: CY8C34 Family
16
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