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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMP88CU74F датащи(PDF) 49 Page - Toshiba Semiconductor |
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TMP88CU74F датащи(HTML) 49 Page - Toshiba Semiconductor |
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49 / 132 page  TMP88CU74 2003-02-17 88CU74-49 2.2.8 Port 7 (P77 to P70) Port 7 is an 8-bit high-breakdown voltage input/output port, and also used as a VFT driver output, which can directly drive vacuum fluorescent tube (VFT). When used as an VFT driver output, the output latch should be cleared to “0”. Pins not used for VFT driver output can be used as I/O ports. When use an VFT driver and normal input/output at the same time, VFT driver output data buffer memory (DBF) need to cleared to “0”. The output latches are initialized to “0” during reset. It recommends that port 7 shoud be used to drive directly drive vacuum fluorescent tube (VFT), since this port has a pull down resistance. 7 6 5 4 3 2 1 0 P77 P76 P75 P74 P73 P72 P71 P70 P7 (00007H) V15 V14 V13 V12 V11 V10 V9 V8 (Initial value: 0000 0000) Figure 2.2.9 Port P7 Data input Data output VFT driver output CMP/MCMP/TEST/Others Output latch D Q SET/CLR/ CPL/Others Note: i = 7 to 0 VKK P7i 2007-10-19 |
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