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HC705JB2GRS/H Datasheet(PDF) 23 Page - NXP Semiconductors

Part # HC705JB2GRS/H
Description  Industry standard M68HC05 CPU core
PDF  128 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

HC705JB2GRS/H Datasheet(HTML) 23 Page - NXP Semiconductors

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August 28, 1998
GENERAL RELEASE SPECIFICATION
MEMORY
REV 1.1
2-3
2.3
RAM
The user RAM consists of 128 bytes (including the stack) located from $0080 to
$00FF. The stack begins at address $00FF and proceeds down to $00C0. Using
the stack area for data storage or temporary work locations requires care to pre-
vent it from being overwritten due to stacking from an interrupt or subroutine call.
2.4
EPROM
The on-chip user EPROM consists of 2048 bytes of EPROM from $1600 to
$1DFF and 16 bytes of user vectors from $1FF0 to $1FFF.
The bootloader ROM and vectors are located from $1E00 to $1FEF.
12 of the user vectors, $1FF4-$1FFF, are dedicated to reset and interrupt vectors.
The four remaining locations, $1FF0-$1FF3, are reserved for test functions. The
Mask Option Register is located at $01FF.
2.5
BOOTLOADER ROM
Addresses $1E00 to $1FEF are reserved ROM addresses that contain the
instructions for the bootloader functions. (See Section 11.)
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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