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Rev. 1.20
36
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Rev. 1.20
37
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HT69F30A/HT69F40A/HT69F50A
TinyPower
TM
I/O Flash 8-Bit MCU with LCD & EEPROM
HT69F30A/HT69F40A/HT69F50A
TinyPower
TM
I/O Flash 8-Bit MCU with LCD & EEPROM
During the programming process, taking control of the ICPDA and ICPCK pins for data and clock
programming purposes. The user must there take care to ensure that no other outputs are connected
to these two pins.
*
*
W r i t e r _ V D D
I C P D A
I C P C K
W r i t e r _ V S S
T o o t h e r C i r c u i t
P A 2
V S S
P A 0
V D D
W r i t e r C o n n e c t o r
S i g n a l s
M C U P r o g r a m m i n g
P i n s
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 is an EV chip named HT69V0A which is used to emulate the HT69Fx0A series of devices.
The HT69V50A device also provides the “On-Chip Debug” function to debug the HT69Fx0A
series of devices during development process. The devices, HT69Fx0A and HT69V50A, are almost
functional compatible except the “On-Chip Debug” function and package types. Users can use
the HT69V50A device to emulate the HT69Fx0A series of devices behaviors 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 HT69V50A EV chip for debugging, the corresponding pin functions shared with
the OCDSDA and OCDSCK pins in the HT69Fx0A series of devices will have no effect in the
HT69V50A 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 more detailed OCDS
information, 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
�CDSDA
�CDSDA
�n-Chip De�ug Suppo�t Data/Add�ess input/output
�CDSCK
�CDSCK
�n-Chip De�ug Suppo�t Clo�k input
VDD
VDD
Powe� Supply
GND
VSS
G�ound