參數(shù)資料
型號(hào)： HCD66727A04BP
廠商： Hitachi,Ltd.
英文描述： Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
中文描述： 低功耗點(diǎn)陣液晶顯示控制器/鍵掃描功能驅(qū)動(dòng)程序
文件頁(yè)數(shù)： 12/97頁(yè)
文件大?。?/td> 513K
代理商： HCD66727A04BP
HD66727
12
Pin Functions
Table 3
Pin Functional Description
Signal
Number of
Pins
I/O
Connected to
Function
IM
1
I
V
CC
or GND
Selects the MPU interface mode:
Low: I
2
C bus mode
High: Clock-synchronized serial mode
ID1/ CS*
1
I
ID1: V
or GND
CS*: MPU
Inputs the HD66727's identification code (ID1) in the I
2
C
bus mode.
Selects the HD66727 in the clock-synchronized serial
mode:
Low: HD66727 is selected and can be accessed
High: HD66727 is not selected and cannot be accessed
SDA
1
I/O
MPU
Inputs/outputs serial (receive/transmit) data and outputs
the acknowledge bit in the I
2
C bus mode.
Inputs/outputs serial (receive/transmit) data in the clock-
synchronized serial mode.
SCL
1
I
MPU
Inputs serial clock pulses. Serial data is latched at the
rising edge of each clock pulse.
ID0
1
I
V
CC
or GND
Inputs the HD66727's identification code in both
interface modes; must be fixed to high or low.
IRQ*
1
O
MPU
Generates the key scan interrupt signal.
KST0–
KST7
8
O
Key matrix
Generates strobe signals for latching scanned data from
the key matrix at specific time interval.
KIN0–KIN3 4
I
Key matrix
Samples key state from key matrix synchronously with
strobe signals.
LED0–
LED2
3
O
LED back light
Output ports for control of LED or back light. Can draw 2
mA–3 mA sink current. Also used as general ports.
PORT0–
PORT2
3
O
General output
General output ports. These ports cannot drive current
such as LED control.
COMS1/2,
COMS2/1
2
O
LCD
Common output signals for segment-icon display.
COM1/32–
COM32/1
32
O
LCD
Common output signals for character display: COM1 to
COM8 for the first line; COM9 to COM16 for the second
line, COM17 to COM24 for the third line, and COM25 to
COM32 for the fourth line. All the unused pins output
deselection waveforms. In the sleep mode (SLP = 1) or
standby mode (STB = 1), all pins output V
level.
The CMS bit can change the shift direction of the
common signal. For example, if CMS = 0, COM1/32 is
COM1. If CMS = 1, COM1/32 is COM32.
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