MC68HC705E5 Datasheet, PDF (107/148 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
General Release Specification — MC68HC705E5
Section 13. User EPROM
13.1 Contents
13.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
13.3 Bootloader Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
13.4 Programming Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
13.5 Mask Option Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113
13.2 Introduction
The user EPROM consists of 5120 bytes of EPROM from $0B00 to
$1EFF and 16 bytes of user vectors from $1FF0 to $1FFF.
The bootloader ROM and vectors are located from $1F01 to $1FEF.
All of the user vectors, $1FF2 through $1FFF, are dedicated to reset and
interrupt vectors. Location $1F00 is the mask option register (MOR).
13.3 Bootloader Mode
Bootloader mode is entered upon the rising edge of RESET if the IRQ is
at V_TST and the PB1 pin is at logic 1. The bootloader code resides in the
ROM from $1F01 to $1FEF. This program handles copying of user code
from an external EPROM into the on-chip EPROM. The bootload
function does not have to be done from an external EPROM, but it may
be done from a host.
The user code must be a one-to-one correspondence with the internal
EPROM addresses.
NOTE: The MCU designer must disable the COP hardware in bootloader mode.
MC68HC705E5 — Rev. 1.0
General Release Specification
User EPROM
For More Information On This Product,
Go to: www.freescale.com