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看了个同系列的屏,不过rs232驱动的,看看有参考价值吗
补充内容 (2013-11-6 22:10):
3.6.3 SERIAL INTERFACE OPERATION
The NAGP1235A series of VFD modules provides up to three serial interfaces depending on the exact
model of the display: RS-232 level asynchronous, CMOS level asynchronous and CMOS level
synchronous. Each of these modes is jumper selectable. Each mode uses the SBUSY line to control data
flow.
When an 8-bit byte is sent to a module, SBUSY is asserted. One more byte may be sent after SBUSY is
asserted. Although this is possible, it is not recommended. Then, the host must wait until the module
clears SBUSY before sending any more data.
The table below shows the data format and rates for the RS-232 level and CMOS level of asynchronous
communication. It is not possible to read SBUSY from the display using a serial interface. |
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