參數(shù)資料
型號: HD66731
廠商: Hitachi,Ltd.
英文描述: Dot-Matrix Liquid Crystal Display Controller/Driver(點陣液晶顯示控制器/驅動器)
中文描述: 點陣液晶顯示控制器/驅動器(點陣液晶顯示控制器/驅動器)
文件頁數(shù): 14/131頁
文件大?。?/td> 5169K
代理商: HD66731
HD66730/HD66731
14
Pin Function (HD66731)
Table 2
Pin Functional Description
Signal
RESET*
Number
of Pins
1
I/O
I
Device
Interfaced with
Function
Acts as a reset input pin. The LSI is initialized during
low level. Refer to Reset Function.
Must be reset after power-on.
Selects interface mode with the MPU;
Low: Serial mode
High: 8-bit bus mode
Selects registers during bus mode:
Low: Index register (write);
Status register (read)
High: Control register (write);
RAM data (read/write)
Acts as chip-select during serial mode:
Low: Select (access enable)
High: Not selected (access disable)
Selects read/write during bus mode;
Low: Write
High: Read
Inputs serial data during serial mode.
Starts data read/write during bus mode;
Inputs (Receives) serial clock during serial mode.
Seven high-order bidirectional tristate data bus pins.
Used for data transfer between the MPU and the
HD66731. DB7 can be used as a busy flag. Open these
pins during serial mode since these signals are not
used.
The lowest bidirectional data bit (DB0) during bus
mode. Outputs (transmits) serial data during serial
mode. Open this pin if reading (transmission) is not
performed.
Display data output signals for the segment extension
driver.
Acts as a common output signal for segment display.
Used to display icon and marks beside the character
display.
Acts as common output signals for character display.
COM14 acts as same as COMS when 1/14 duty.
COM27 acts as same as COMS when 1/27 duty.
COM40 acts as same as COMS when 1/40 duty.
Unused common pins output non-selective waveforms.
Acts as common output signal for segment display
when 1/53 duty. The waveform is same as coms.
This COM53 outputs non-selective waveform when
another duty.
IM
1
I
RS/CS*
1
I
MPU
R
W
/SID
1
I
MPU
E/SCLK
1
I
MPU
DB1 to DB7
7
I/O
MPU
DB0/ SOD
1
I/O /O MPU
SEG1 to
SEG119
COMS
119
O
LCD
1
O
LCD
COM1 to
COM51
51
O
LCD
COM53
1
O
LCD
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