HTG2150 Ver la hoja de datos (PDF) - Holtek Semiconductor
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HTG2150 Datasheet PDF : 38 Pages
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HTG2150
The function of data movement between two indirect ad-
dressing registers, is not supported. The memory
pointer registers, MP0 and MP1, are 8-bit registers
which can be used to access the data memory by com-
bining corresponding indirect addressing registers but
Bank 15 can use MP1 only.
Accumulator
The accumulator is closely related to ALU operations. It
is also mapped to location 05H of the data memory and
it can carry out immediate data operations. The data
movement between two data memories has to pass
through the accumulator.
LCD driver output
The maximum output number of the HTG2150 LCD driver
is 8´40. The LCD driver bias type is ²R² type, no external
capacitor is required and the bias voltage is 1/4 bias.
Some of the Segment outputs share pins with another pins,
PB4~PB7 (SEG33~SEG36), INT (SEG37), XOUT
(SEG38), XIN (SEG39). Whether segment output or I/O pin
can individually be decided by mask option.
LCD driver output can be enabled or disabled by setting
the LCD (bit 6 of LCDC; 2EH) without the influence of the
related memory condition. There is a special function for
LCD display, which is Rotate function. There are 8 kinds of
Rotate function, (user can change the data of the SS0 to
SS3.)
An example of an lcd driving waveform (1/8 duty, 1/4
bias) is shown below.
32H z
12 34 567 812 34 56 7 812 34 5
512H z
COM 0
V DD
3 /4 V D D
2 /4 V D D
1 /4 V D D
GND
COM 1
V DD
3 /4 V D D
2 /4 V D D
1 /4 V D D
GND
SEG 0
V DD
3 /4 V D D
2 /4 V D D
1 /4 V D D
GND
L C D d is p la y m e m o r y : (B a n k 1 5 )
A d d re s s 8 0 H
81H
82H
83H
COM 0
B it0
COM 1
B it1
COM 2
B it2
COM 3
B it3
COM 4
B it4
COM 5
B it5
COM 6
B it6
COM 7
B it7
SEG 0
SEG 1
SEG 2
SEG 3
84H
85H
SEG 4 SEG 5
91H
92H
S E G 17 S E G 18
A 7H
S E G 39
Rev. 1.30
10
May 21, 2002
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