SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
Figure 26-102 shows a typical connection of the QSPI module to the external quad-SPI flash memory.
Table 26-277 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) | ||
qspi1_d[0] | 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 |
qspi1_d[1] | I | Not used | Not used | Used as SPI data input | Not used | Used as SPI data input 1 | Used as SPI data input 1 |
qspi1_d[2] | I | Not used | Not used | Not used | Not used | Not used | Used as SPI data input 2 |
qspi1_d[3] | I | Not used | Not used | Not used | Not used | Not used | Used as SPI data input 3 |
qspi1_sclk | O | Clock for the external SPI device | |||||
qspi1_cs[0] | O | External SPI device chip-select 0 | |||||
qspi1_cs[1] | O | External SPI device chip-select 1 | |||||
qspi1_cs[2] | O | External SPI device chip-select 2 | |||||
qspi1_cs[3] | O | External SPI device chip-select 3 | |||||
qspi1_rtclk | I | The qspi1_sclk output must be connected to the qspi1_rtclk 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 qspi1_sclk to the qspi1_rtclk. |
In order 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.