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BU91501KV-M Datasheet(PDF) 5 Page - Rohm |
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BU91501KV-M Datasheet(HTML) 5 Page - Rohm |
5 / 34 page 5/30 BU91501KV-M Datasheet TSZ02201-0P4P0D301120-1-2 8.July.2015 Rev.001 www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 I/O equivalent circuit Figure 6. I/O equivalent circuit Function descriptions Command and Data Transfer Method 3-SPI (3-wire Serial Interface) This device is controlled by a 3-wire signal (CSB, SCL, and SD). First, Interface counter is initialized with CSB=“H" Setting CSB=”L” enables SD and SCL inputs. First, Interface counter is initialized with CSB=“H", and then CSB=”L” makes SD and SCL input enable. The protocol of 3-SPI transfer is shown as follows. Each command starts with D7 bit as MSB data, followed by D6 to D0 (this is while CSB =”L”). (Internal data is latched at the rising edge of SCL, then the data is converted to an 8-bit parallel data at the falling edge of the 8th CLK.) When you rise CSB = “H”, in case command less than 8bit, command and data are canceled. (1) Write Mode Figure 7. 3-SPI Data Transfer Format 3 |
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