cy8c3446lti-075es2 Cypress Semiconductor Corporation., cy8c3446lti-075es2 Datasheet - Page 23

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

35. IDAC Current Consumption
36. IDAC and Analog Global Performance
January 7, 2011
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PROBLEM DEFINITIO
Using a VIDAC in IDAC mode causes an increase in current consumption of approximately 1 mA in the chip
due to setting of the IDAC bit. The CapSense component, which includes an embedded IDAC exhibits the
same symptoms. Calling the Start API sets the bit. Calling the Stop API does not clear the bit.
PARAMETERS AFFECTED
NA
TRIGGER CONDITION(S)
Starting a IDAC by setting the DAC_MODE_ENUM bit located in the DAC[0..3]_CR0 register (0x5820).
WORKAROUND
NA
FIX STATUS
Silicon revision fix confirmed in production silicon.
PROBLEM DEFINITION
Enabling an IDAC by calling the start API in either a IDAC component or CapSense component as it intergrates
an IDAC results in leakage from Vdda to ground on analog globals AGR[3], AGR[7], AGL[3], and AGL[7].
PARAMETERS AFFECTED
NA
TRIGGER CONDITION(S)
Starting an IDAC by setting the DAC_MODE_ENUM bit located in the DAC[0..3]_CR0 register (0x5820).
SCOPE OF IMPACT
Causes voltage offsets of signals routed onto the affected analog globals due to interaction of the leakage
and internal switch resistances.
WORKAROUND
Disable the analog supply pump by clearing bit 0 and bit 1 in register PUMP_CR0 (0x5876).
FIX STATUS
Silicon revision fix confirmed in production silicon.
Document Number: 001-61136 Rev. *C
Errata Document
PSoC
®
3: CY8C34 Family
23
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