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Tongzhou CDVB2200 set-top box digital display and drive circuit
Source: InternetPublisher:刘德华河北分华 Keywords: drive circuit digital display shift Updated: 2020/04/22
Shown is the digital display and drive circuit of Tongzhou CD VB2200 set-top box. The display circuit consists of a 4-bit 7-segment digital tube 74HC595
and a drive circuit . The CPU inputs the programmed shift clock, latch signal and channel number data from the GP10 port to the 8-bit serial
input or vertical input shift memory. The 74HC595 completes the conversion work and drives the digital display according to the The entered data displays the corresponding
channel.
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