參數(shù)資料
型號(hào)： PCF2119X-2
廠商： NXP Semiconductors N.V.
英文描述： LCD controllers/drivers
中文描述： LCD控制器/驅(qū)動(dòng)器
文件頁(yè)數(shù)： 19/60頁(yè)
文件大小： 284K
代理商： PCF2119X-2
28. August 2000
19
Philips Semiconductors
Product specification
LCD controllers/drivers
PCF2119x-2
8
INSTRUCTIONS
Only two PCF2119x registers, the Instruction Register (IR)
and the Data Register (DR) can be directly controlled by
the MPU. Before internal operation, control information is
stored temporarily in these registers, to allow interfacing to
various types of MPUs which operate at different speeds
or to allow interface to peripheral control ICs.
The PCF2119x operation is controlled by the instructions
shown in Table 6 together with their execution time.
Details are explained in subsequent sections.
Instructions are of 4 types, those that:
1.
Designate PCF2119x functions such as display
format, data length, etc.
2.
Set internal RAM addresses
3.
Perform data transfer with internal RAM
4.
Others.
In normal use, category 3 instructions are used most
frequently. However, automatic incrementing by 1
(or decrementing by 1) of internal RAM addresses after
each data write lessens the MPU program load.
The display shift in particular can be performed
concurrently with display data write, enabling the designer
to develop systems in minimum time with maximum
programming efficiency.
During internal operation, no instructions other than the
‘read busy flag’ and ‘read address’ instructions will be
executed. Because the busy flag is set to a logic 1 while an
instruction is being executed, check to ensure it is a logic 0
before sending the next instruction or wait for the
maximum instruction execution time, as given in Table 6.
An instruction sent while the busy flag is logic 1 will not be
executed.
Table 5
Instruction set for I
2
C-bus commands
Note
1.
R/W is set together with the slave address.
CONTROL BYTE
COMMAND BYTE
I
2
C-BUS COMMANDS
Co
RS 0
0
0
0
0
0
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
note 1
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