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| 型号： | M0420SD-204SDAR1-3 |
| 厂商： | Newhaven Display Intl |
| 文件页数： | 4/24页 |
| 文件大小： | 1131K |
| 描述： | MODULE VF CHAR 4X20 4.84MM |
| 产品培训模块： | Serial LCD Displays |
| 标准包装： | 50 |
| 外形L x W x H： | 100.00mm x 60.00mm x 20.60mm |
| 可视范围： | 73.60mm L x 30.96mm W |
| 显示格式： | 20 x 4 |
| 显示器类型： | 字符 |
| 格式： | 5 x 8 点 |
| 电源电压： | 5V |
| 字符尺寸： | 4.84mm H x 2.35mm W |
| 工作温度： | -40°C ~ 85°C |
DOCUMENT NUMBER: REV:
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5.0 MODES OF OPERATION
The following modes of operation are selectable via jumpers (see section 9.0 Jumper Settings).
5.1 PARALLEL INTERFACE MODES
In the parallel interface mode, 8-bit instructions and data are sent between the host and the
modules using either 4-bit nibbles or 8-bit bytes. Nibbles are transmitted high nibble first on
DB4-DB7 (DB0-DB3 are ignored) whereas bytes are transmitted on DB0-DB7. The Register
Select (RS) control signal is used to identify DB0-DB7 as an instruction (low) or data (high).
5.1.1 MOTOROLA M68-TYPE MODE
This mode uses the Read/Write (R/W) and Enable (E) control signals to transfer information.
Instructions/data are written to the module on the falling edge of E when R/W is low and are
read from the module after the rising edge of E when R/W is high.
R/W
E
DB7
IB7 IB7 IB3 BF= ' 0 ' IB3 DB7 DB3IB3
IB6 IB2
IB6 IB2
IB2
IB6
DB6 DB2
DB6
IB5 IB1
IB5 IB1
IB1
IB5
DB5 DB1
DB5
IB4 IB0
IB4 IB0
IB0
IB4
DB4 DB0
DB4
Write instruction
Write instruction
Read instruction
Write data
RS
Figure 9.
Typical 4-Bit Parallel Interface Sequence Using M68-Type Mode
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M0420SD-204SDAR1-3
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