ABB 1SAP250300R0001 AI523 AI523B4 modular

ABB 1SAP250300R0001 AI523 AI523B4 modular

To write the 16-bit slot-select number to Slot 0, follow these steps: 1. Initial conditions: SERDATIN = don't care. DAQD*/A = don't care. SLOT0SEL* = 1. SERCLK = 1. 2. Clear SLOT0SEL* to 0 to deassert all SS* lines to all modules in all chassis. 3. For each bit, starting with the most significant bit, set the bits as follows: a. SERDATIN = bit to be sent. These bits are the data that is being written to the Slot-Select Register. b. SERCLK = 0 c. SERCLK = 1. This rising edge clocks the data. If you are using an MIO-16 board, a write to the EXTSTROBE Register will cause EXTSTROBE* to pulse low, thus accomplishing steps b and c.

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