HT45F3230 Datasheet, PDF (24/148 Pages) Holtek Semiconductor Inc – IR Sensing/Motor Driving Flash MCU

HT45F3230
IR Sensing/Motor Driving Flash MCU
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
OCDSDA
OCDSCK
VDD
VSS
EV Chip Pins
OCDSDA
OCDSCK
VDD
VSS
Pin Description
On-Chip Debug Support Data/Address input/output
On-Chip Debug Support Clock input
Power Supply
Ground
Data Memory
The Data Memory is a volatile area of 8-bit wide RAM internal memory and is the location where
temporary information is stored.
Structure
Divided into two areas, the first of these is an area of RAM, known as the Special Function Data
Memory. Here are located registers which are necessary for correct operation of the device. Many
of these registers can be read from and written to directly under program control, however, some
remain protected from user manipulation. The second area of Data Memory is known as the General
Purpose Data Memory, which is reserved for general purpose use. All locations within this area are
read and write accessible under program control.
The overall Data Memory is subdivided into two banks. The Special Purpose Data Memory registers
are accessible in all banks, with the exception of the EEC register at address 40H, which is only
accessible in Bank 1. Switching between the different Data Memory banks is achieved by setting the
Bank Pointer to the correct value. The start address of the Data Memory for the device is the address
00H.
00H
Special Purpose
Data Memory
(Bank 0~1)
7FH
80H
EEC
Bank 1
General Purpose
Data Memory
(Bank 0)
FFH
Bank 0
Data Memory Structure
Rev. 1.00
24
January 13, 2017