HT45F0057 datasheet(17/88 Pages) HOLTEK

17 / 88 page

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HT45F0057

Induction Cooker Flash MCU

HT45F0057

Induction Cooker Flash MCU

Holtek Writer Pins

MCU Programming Pins

Pin Description

ICPDA

PB0

P�og�amming Se�ial Data/Add�ess

ICPCK

PB3

P�og�amming Clo�k

VDD

Powe� Supply

VSS

G�ound

The Program Memory can be programmed serially in-circuit using this 4-wire interface. Data

is downloaded and uploaded serially on a single pin with an additional line for the clock. Two

additional lines are required for the power supply. The technical details regarding the in-circuit

programming of the device are beyond the scope of this document and will be supplied in

supplementary literature.

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.

Writer_VDD

ICPDA

ICPCK

Writer_VSS

To other Circuit

VDD

PB0

PB3

VSS

Writer Connector

Signals

MCU Programming

Pins

PA2

Note: 1.* may be resistor or capacitor. The resistance of * must be greater than 1kΩ or the

capacitance of * must be less than 1nF.

2. A Resistor with a value less than 1MΩ is recommended to be connected between PA2 and

VSS pins during programming.

On-Chip Debug Support – OCDS

There is an EV chip named HT45V0057 which is used to emulate the HT45F0057. The EV chip

device 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 using the EV device during debug, if there are other pin functions

which are shared with the OCDSDA and OCDSCK pins, then these functions will have no effect

in the EV chip. The two OCDS pins, which are pin-shared with the ICP programming pins, are still

used as 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

�CDSDA

�n-�hip De�ug Suppo�t Data/Add�ess input/output

�CDSCK

�n-�hip De�ug Suppo�t Clo�k input

VDD

Powe� Supply

VSS

G�ound

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