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IC-MPEVALMP1D датащи(PDF) 13 Page - IC-Haus GmbH |
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IC-MPEVALMP1D датащи(HTML) 13 Page - IC-Haus GmbH |
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13 / 22 page ![]() iC-MP 8-BIT HALL ANGLE ENCODER WITH RATIOMETRIC OUTPUT Rev B1, Page 13/22 Figure 13: Serial timing of Write ROM Mode Figure 13 shows the serial timing of a Write ROM op- eration (burning the Zener zap diodes). The bit stream is described in Table 4. Each Zener zap diode can be programmed once with a logic of ’1’. The default value of the Zener zap diodes is a logic ’0’ (with the excep- tion of ZTEST(1:0)). The resulting parameter (OFF- SET, MODE and ENERR) are generated by an xor op- eration of the three sets of bits (see Figure 15). Figure 14: In-circuit programming A 100 nF ceramic block capacitor must be placed on the board directly between iC-MP’s VZAP and GND pins. A 10 µF capacitor must also be present at the end of the programming line as close to the connec- tor as possible (see Figure 14). During programming, up to 90 mA flow from pin VZAP to pin GND, making it necessary to ensure proper PCB layout to minimize voltage drops. Figure 15: ROM construction |
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