MC68HC708MP16 Datasheet, PDF (55/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

Technical Data — MC68HC708MP16
Section 4. EPROM/OTPROM
4.1 Contents
4.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.3 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
4.4 EPROM/OTPROM Control Register. . . . . . . . . . . . . . . . . . . . .56
4.5 EPROM/OTPROM Programming Sequence . . . . . . . . . . . . . . 57
4.2 Introduction
This section describes the non-volatile memory (EPROM/OTPROM).
4.3 Functional Description
An MCU with a quartz window has 16 Kbytes of erasable, programmable
ROM (EPROM). The quartz window allows EPROM erasure by using
ultraviolet light. In an MCU without the quartz window, the EPROM
cannot be erased and serves as 16 Kbytes of one-time programmable
ROM (OTPROM). An unprogrammed or erased location reads as $00.
The following addresses are user EPROM/OTPROM locations:
• $BE00–$FDFF
• $FFD2–$FFFF (These locations are reserved for user-defined
interrupt and reset vectors.)
NOTE:
Programming tools are available from Freescale. Contact your local
Freescale representative for more information.
A security feature prevents viewing of the EPROM/OTPROM contents.¹
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or
copying the EPROM/OTPROM difficult for unauthorized users.
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor
EPROM/OTPROM
Technical Data
55