On-Chip De��G S�Ppo�T Clock Inp�T - Holtek BS83B24C Manual

On-Chip Debug Support – OCDS
There are EV chips named BS83BV24C and BS83CV40C which are used to emulate the real MCU
devices named BS83B24C and BS83C40C respectively. The EV chip device also provides an "On-
Chip Debug" function to debug the 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 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.
e-Link Pins
OCDSDA
OCDSCK
VDD
VSS
Rev. 1.00
EV Chip Pins
OCDSDA On-chip de��g s�ppo�t data/add�ess inp�t/o�tp�t
OCDSCK On-chip de��g s�ppo�t clock inp�t
VDD Powe� s�ppl�
VSS G�o�nd
30
BS83B24C/BS83C40C
Touch Flash MCU
Pin Description
�e���a�� 0�� �01�