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BLOCK DIAGRAM OF INTEGRATED CIRCUIT
LCD DRIVER HT1621B
OSCO
OSCI
Control
and
CS
Timing
RD
Circuit
WR
DATA
VDD
VSS
BZ
Tone Frequency
Generator
BZ
PINS DESCRIPTION OF LCD DRIVER HT1621B
PIN FUNCTION
4 - 9
Display RAM
COM0
COM3
LCD Driver/
Bias Circuit
SEG0
SEG31
VLCD
Watchdog Timing
and
IRQ
Time Base Generator
BLOCK DIAGRAM OF INTEGRATED CIRCUIT
DRAM MSM514265C
PINS DESCRIPTION OF INTEGRATED CIRCUIT
DRAM MSM514265C
4 - 9
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