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IS25WP016 Datasheet(PDF) 11 Page - Integrated Silicon Solution, Inc |
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IS25WP016 Datasheet(HTML) 11 Page - Integrated Silicon Solution, Inc |
11 / 112 page IS25WP016/080/040/020 Integrated Silicon Solution, Inc.- www.issi.com 11 Rev. 00A 01/13/2015 4. SPI MODES DESCRIPTION Multiple IS25WP016/080/040/020 devices can be connected on the SPI serial bus and controlled by a SPI Master, i.e. microcontroller, as shown in Figure 4.1. The devices support either of two SPI modes: Mode 0 (0, 0) Mode 3 (1, 1) The difference between these two modes is the clock polarity. When the SPI master is in stand-by mode, the serial clock remains at “0” (SCK = 0) for Mode 0 and the clock remains at “1” (SCK = 1) for Mode 3. Please refer to Figure 4.2 and Figure 4.3 for SPI and QPI mode. In both modes, the input data is latched on the rising edge of Serial Clock (SCK), and the output data is available from the falling edge of SCK. Figure 4.1 Connection Diagram among SPI Master and SPI Slaves (Memory Devices) Notes: 1. In case of 16-pin SOIC package, RESET# pin will be added to another pin without sharing with HOLD# pin for the dedicated parts. See the Ordering Information for the additional RESET# pin option. 2. SI and SO pins become bidirectional IO0 and IO1, and WP# and HOLD# pins become IO2 and IO3 respectively during QPI mode. SPI interface with (0,0) or (1,1) SPI Master (i.e. Microcontroller) SPI Memory Device SPI Memory Device SPI Memory Device SCK SO SI SCK SDI SDO CE# WP# HOLD# or RESET SCK SO SI CE# WP# HOLD# or RESET# SCK SO SI CE# WP# CS3 CS2 CS1 HOLD# or RESET# (1) (1) (1) ADVANCED INFORMATION |
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