參數(shù)資料
型號： HTG2190
廠商： Holtek Semiconductor Inc.
元件分類： 8位微控制器
英文描述： 8-Bit 1024 Pixel LCD Microcontroller
中文描述： 8位單片機1024像素LCD
文件頁數(shù)： 13/64頁
文件大?。?/td> 417K
代理商： HTG2190
HTG2190
Rev. 1.00
13
June 29, 2001
In a similar case, if the stack is full and a CALL
is subsequently executed, stack overflow occurs
and the first entry will be lost (only the most re-
cent eight return address are stored).
Data memory
RAM
Bank 0 (BP4~BP0=00000)
The Bank 0 data memory includes special
purpose and general purpose memory. The
special purpose memory is addressed from
00H to 3FH. All data memory areas can han-
dle arithmetic, logic, increment, decrement
and rotate operations directly. Except for
some dedicated bits, each bit in the data
memory can be set and reset by the SET [m].i
andCLR[m].iinstructions,respectively.They
are also indirectly accessible through the mem-
ory pointer registers (MP0;01H, MP1;03H).
Bank 1~11 (BP4~BP0=0001B~1011B)
The range of RAM starting from 40H to FFH
are for general purpose. Only MP1 can deal
with the memory of this range.
Bank 14/15 (BP4~BP0=01110B~01111B)
The range of RAM starts from 80H to FFH.
Every bit stands for one dot on the LCD. If the
bit is "1", the light of the dot on the LCD will
be turned on. If the bit is "0", then it will be
turned off. Only MP1 can deal with the mem-
ory of this range.
The contrast form of RAM location, COM-
MON, and SEGMENT is as follows.
The maximum output number of the HTG2190
LCD driver is 16 64. The Common output sig-
nal can be selected as 16 com or 8 com by mask
option. The LCD driver bias type is "C" type, ex-
ternalcapacitorisrequiredandthebiasvoltage
is 1/4 bias. Some of the Segment outputs share
pins with I/O pins, PE0~PE7 (SEG40~47),
PD0~PD7(SEG48~55)andPC0~PC7(SEG56~63).
Whether segment output or I/O pin can be de-
cided by mask option.
LCD driver output can be enabled or disabled
by setting COL3 (bit 6 of COL3; 2EH) without
the influence of the related memory condition.
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RAM mapping
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