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X40231, X40233, X40235 pdf dat

消耗积分:3 | 格式:rar | 大小:344 | 2009-01-10

张艳

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The X4023x family of Integrated System Management
ICs combine CPU Supervisor functions (VCC
Power-onpower-on Reset (POR) circuitry, two additional
programmable voltage monitor inputs with software
and hardware indicators), integrated EEPROM
with Block LockTM protection and one or two Intersil
Digitally Controlled Potentiometers (XDCP). All functions
of the X4023x are accessed by an industry
standard 2-Wire serial interface.
APPLICATIONS
The DCP of the X4023x may be utilized to software
control analog voltages for:
– LCD contrast, LCD purity, or Backlight control.
– Power Supply settings such as PWM frequency,
Voltage Trimming or Margining (temperature offset
control).
– Reference voltage setting (e.g. DDR-SDRAM SSTL-2)
The 2 kbit integrated EEPROM may be used to store
ID, manufacturer data, maintenance data and module
definition data.
The programmable POR circuit insures VCC is stable
before RESET is removed and protects against
brown-outs and power failures. The programmable
voltage monitors have on-chip independent reference
alarm levels. With separate outputs, the voltage monitors
can be used for power-on sequencing.
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