Holtek BS82B12A-3 - On-Chip Deb�G S�Ppo�T - OCDS

Rev. 1.20 30 January 23, 2015 Rev. 1.20 31 January 23, 2015
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
* *
Writer_VDD
IC PDA
IC PCK
Writer_VSS
To o th er C ir cuit
PA0
PA2
VSS
VDD
Writer C onnector
Signals
MCU Progra mmin g
Pins
Note:*mayberesistororcapacitor.Theresistanceof*mustbegreaterthan1korthecapacitance
of*mustbelessthan1nF.
On-Chip Debug Support – OCDS
TherearethreeEVchipsnamedBS82BV12A-3,BS82CV16A-3andBS82DV20A-3whichare
usedtoemulatetheBS82B12A-3,BS82C16A-3andBS82D20A-3devicesrespectively.EachEV
chipdevicealsoprovidesan"On-ChipDebug"functiontodebugthecorrespondingMCUdevice
duringthedevelopmentprocess.TheEVchipandtheactualMCUdevicearealmostfunctionally
compatibleexceptforthe"On-ChipDebug"function.UserscanusetheEVchipdevicetoemulate
therealchipdevicebehaviorbyconnectingtheOCDSDAandOCDSCKpinstotheHoltekHT-
IDEdevelopmenttools.TheOCDSDApinistheOCDSData/Addressinput/outputpinwhilethe
OCDSCKpinistheOCDSclockinputpin.WhenusersusetheEVchipfordebugging,other
functionswhicharesharedwiththeOCDSDAandOCDSCKpinsintheactualMCUdevicewill
havenoeffectintheEVchip.However,thetwoOCDSpinswhicharepin-sharedwiththeICP
programmingpinsarestillusedastheFlashMemoryprogrammingpinsforICP.Foramoredetailed
OCDSdescription,refertothecorrespondingdocumentnamed"Holteke-Linkfor8-bitMCU
OCDSUser’sGuide".
Holtek e-Link Pins EV Chip Pins Pin Description
OCDSDA OCDSDA
On-chip Debug Support Data/Address input/output
OCDSCK OCDSCK On-chip Debug Support Clock input
VDD VDD Power Supply
GND VSS Ground