User Guide V0.90
1
Introduction
Supports In-System Programming (ISP) of
the following microcontroller families:
• Philips P (+12V Vpp)
• Philips P89C51Rx2 (No Vpp required)
• Powerful ‘GEMINI’ programmer
interface software:
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Compatible with Windows 3.1, 95, 98 and NT
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Device commands include Check Signature,
Blank Check, Erase, Read, Write, Verify, Security,
Auto-program
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Powerful buffer system with Blank Check, Erase,
Fill, Goto and Checksum commands
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Supports reading and writing of target device
fuse bits and lock bits
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Supports Binary and Intel HEX file formats
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User-configurable
~ RESET polarity
~ RESET timing state machine
~ Target Baud Rate
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Context-sensitive help system
• Field upgradable firmware via
Internet downloadable utility -
caters for new programmer
algorithms in the future
• On-board Vpp generator (+12V)
• Programmer ‘Active’ signal - used to
drive an LED on the target system
• Connects to spare PC COM (serial)
port
• Robust ‘EMC-friendly’ design plus
I/O pin protection
• CE compliant product
The GEMINI-1 is a state-of-the-art device
programmer supporting the new range of
In-System Programmable (ISP)
microcontrollers from Philips. These
microcontrollers feature serially
downloadable memory allowing both CODE
and DATA (if device features EEPROM) areas
to be updated in-system without physically
removing the target device from the
application board. The serial programming
is through the on-chip UART.
Please Note:
This programmer is designed for development
use only.
GEMINI-1 DEVICE PROGRAMMER
HIGHLIGHTS
Order Code: EQ-GEM1
(4.8-5.0V)
