SPRUJ17H March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
Figure 13-199 shows a typical connection of the QSPI module to the external quad-SPI flash memory.
Table 13-252 lists and describes the QSPI I/O signals.
QSPI Signal/Pad name | I/O(1) | Description | |||||
---|---|---|---|---|---|---|---|
3-pin(2) SPI Read (Single Read) | 3-pin(2) SPI Write (Single Write) | 4-pin(2) SPI Read (Single Read) | 4-pin(2) SPI Write (Single Write) | 4-pin(2) SPI Read (Dual Read) | 6-pin(2) SPI Read (Quad Read) | ||
QSPI0_D0 | IO | Used as SPI data input | Used as SPI data output | Not used | Used as SPI data output | Used as SPI data input 0 | Used as SPI data input 0 |
QSPI0_D1 | I | Not used | Not used | Used as SPI data input | Not used | Used as SPI data input 1 | Used as SPI data input 1 |
QSPI0_D2 | I | Not used | Not used | Not used | Not used | Not used | Used as SPI data input 2 |
QSPI0_D3 | I | Not used | Not used | Not used | Not used | Not used | Used as SPI data input 3 |
QSPI0_CLK | O | Clock for the external SPI device | |||||
QSPI0_CS0 | O | External SPI device chip-select 0 | |||||
QSPI0_CLKLB | IO | The QSPI0_CLK output must be connected to the QSPI0_CLKLB input, and is used for controlling the timing of the read return data when the QSPI module operates in Mode 0. In case Mode 3 is used, there is no need to connect the QSPI0_CLK to the QSPI0_CLKLB. |
To ensure proper timing, precise layout and routing requirements must be followed. For layout and routing requirements for all QSPI signals, see section “PCB Guidelines” of the device Data Manual.