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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PC87570-ICC/VUL датащи(PDF) 25 Page - National Semiconductor (TI) |
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PC87570-ICC/VUL датащи(HTML) 25 Page - National Semiconductor (TI) |
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25 / 168 page  Signal/Pin Connection and Description 25 www.national.com 1. This is a quasi-bidirectional output. It has drive low capability. It is pulsing high for a short period; steady state: pull high using a weak pull-up. See also Section 12.2.3 on page 90 TB 69 75 TTL - Timer pin B TRIS 92 102 STRAP - TRI-STATE strap option. When high, during power-up reset, causes the PC87570 to float all its output and I/O signals. VBAT 26 28 INULR - Battery supply. This is the 2.4 - 5.5V battery voltage for the RTC circuitry. VCC 21, 61, 98, 147 23, 67, 108, 161 N/A N/A Digital 5V or 3.3V power supply VREF 74 80 ANIN ANOUT Reference voltage for the on-chip A/D circuits. With the internal VREF enabled a capacitor is connected between VREF and GND. When the internal VREF is disabled, an External Refer- ence voltage should be connected to this input. WR1,0 103, 102 113, 112 - CM Write control for bytes 0 and 1 Signal Pin Number Buffer Type Function 160-pin 176-pin Input Output |
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