MAXQ7665AATM+ MAXIM [Maxim Integrated Products], MAXQ7665AATM+ Datasheet - Page 37

• Manufacturer Part Number: MAXQ7665AATM+
• Description: 16-Bit RISC Microcontroller-Based Smart Data-Acquisition Systems
• Manufacturer: MAXIM [Maxim Integrated Products]

Asserting the external RESET input low causes the
device to enter the reset state. The external reset func-
tions as described in the MAXQ7665/MAXQ7666 User’s
Guide . Execution resumes at location 8000h after
RESET is released.
The MAXQ7665A–MAXQ7665D require a crystal with
the following specifications:
Frequency: 8MHz
C
Drive level: 5µW
Series resonance resistance: 30Ω max
Note: Series resonance resistance is the resistance
observed when the resonator is in the series resonant
condition. This is a parameter often stated by quartz crys-
tal vendors and is called R1. When a resonator is used in
the parallel resonant mode with an external load capaci-
tance, as is the case with the MAXQ7665A–MAXQ7665D
oscillator circuit, the effective resistance is sometimes
stated. This effective resistance at the loaded frequency
of oscillation is:
LOAD
: 6pF (min)
R1 x ( 1 + (C
______________________________________________________________________________________
External System Reset
O
/C
LOAD
16-Bit RISC Microcontroller-Based
Crystal Selection
Smart Data-Acquisition Systems
))
2
For typical C
tance can be greater than R1 by a factor of 2.
A variety of highly versatile, affordably priced develop-
ment tools for this µC are available from Maxim and
third-party suppliers, including:
• Compilers
• Evaluation kits
• Integrated development environments (IDEs)
• JTAG-to-serial converters for programming and
A list of some development-tool vendors can be found
at www.maxim-ic.com/microcontrollers.
Technical support is available through email at
[e-mail].
debugging
Development and Technical Support
O
and C
LOAD
values, the effective resis-
37