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TMP88CU74F bảng dữ liệu(PDF) 49 Page - Toshiba Semiconductor

tên linh kiện TMP88CU74F
Giải thích chi tiết về linh kiện  CMOS 8-BIT MICROCONTROLLER
PDF  132 Pages
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nhà sản xuất  TOSHIBA [Toshiba Semiconductor]
Trang chủ  http://www.semicon.toshiba.co.jp/eng
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TMP88CU74F bảng dữ liệu(HTML) 49 Page - Toshiba Semiconductor

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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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