型號：ht1621、ht1621b

描述：ht1621是32 segx4 com ，128點陣 lcd mcu；

features
operating voltage: 2.4v~5.2v
built-in 256khz rc oscillator
external 32.768khz crystal or 256khz frequency
source input
selection of 1/2 or 1/3 bias, and selection of 1/2 or
1/3 or 1/4 duty lcd applications
internal time base frequency sources
two selectable buzzer frequencies (2khz/4khz)
power down command reduces power consumption
built-in time base generator and wdt
time base or wdt overflow output
8 kinds of time base/wdt clock sources
32 4 lcd driver
built-in 32 4 bit display ram
3-wire serial interface
internal lcd driving frequency source
software configuration feature
data mode and command mode instructions
r/w address auto increment
three data accessing modes
vlcd pin for adjusting lcd operating voltage
ht1621: 44-pin qfp/lqfp package
ht1621b: 48-pin ssop/lqfp packages
ht1621g: gold bumped chip
general description
the ht1621 is a 128 pattern (32 4), memory mapping,
and multi-function lcd driver. the s/w configuration
feature of the ht1621 makes it suitable for multiple lcd
applications including lcd modules and display subsystems.
only three or four lines are required for the interface
between the host controller and the ht1621.
the ht1621 contains a power down command to reduce
power consumption.