37.6.8.5 Instruction Frame Transmission Examples
All waveforms in the following examples describe SPI transfers in SPI Clock mode 0 (BAUD.CPOL=0 and BAUD.CPHA=0). All system bus accesses described below refer to the system bus address phase. System bus wait cycles and system bus data phases are not shown.
Example 1
Instruction in Single-bit SPI, without address, without option, without data.
Command: CHIP ERASE (C7h).
- Write 0x0000_00C7 to INSTRCTRL register
- Write 0x0000_0010 to INSTRFRAME register
- Wait for INTFLAG.INSTREND to rise
Example 2
Instruction in Quad SPI, without address, without option, without data.
Command: POWER DOWN (B9h)
- Write 0x0000_00B9 to INSTRCTRL register
- Write 0x0000_0016 to INSTRFRAME register
- Wait for INTFLAG.INSTREND to rise
Example 3
Instruction in Single-bit SPI, with address in Single-bit SPI, without option, without data.
Command: BLOCK ERASE (20h)
- Write the address (of the block to erase) to QSPI_AR
- Write 0x0000_0020 to INSTRCTRL register
- Write 0x0000_0030 toINSTRFRAME register
- Wait for INTFLAG.INSTREND to rise
Example 4
Instruction in Single-bit SPI, without address, without option, with data write in Single-bit SPI.
Command: SET BURST (77h)
- Write 0x0000_0077 to INSTRCTRL register.
- Write 0x0000_2090 to INSTRFRAME register.
- Read INSTRFRAME register (dummy read) to synchronize system bus accesses.
- Write data to the system bus memory space (0x0400_0000–0x0500_0000). The address of the system bus write accesses is not used.
- Write the LASTXFR bit in CTRLA register to '1'.
- Wait for INTFLAG.INSTREND to rise.
Example 5
Instruction in Single-bit SPI, with address in Dual SPI, without option, with data write in Dual SPI.
Command: BYTE/PAGE PROGRAM (02h)
- Write 0x0000_0002 to INSTRCTRL register.
- Write 0x0000_30B3 to INSTRFRAME register.
- Read INSTRFRAME register (dummy read) to synchronize system bus accesses.
-
Write data to the QSPI system bus memory space (0x040 00000–0x0500_0000).
The address of the first system bus write access is sent in the instruction frame.
The address of the next system bus write accesses is not used.
- Write LASTXFR bit in CTRLA register to '1'.
- Wait for INTFLAG.INSTREND to rise.
Example 6
Instruction in Single-bit SPI, with address in Single-bit SPI, without option, with data read in Quad SPI, with eight dummy cycles.
Command: QUAD_OUTPUT READ ARRAY (6Bh)
- Write 0x0000_006B to INSTRCTRL register.
- Write 0x0008_10B2 ti INSTRFRAME register.
- Read QSPI_IR (dummy read) to synchronize system bus accesses.
-
Read data from the QSPI system bus memory space (0x040 00000–0x0500_0000).
The address of the first system bus read access is sent in the instruction frame.
The address of the next system bus read accesses is not used.
- Write the LASTXFR bit in CTRLA register to '1'.
- Wait for INTFLAG.INSTREND to rise.
Example 7
Instruction in Single-bit SPI, with address and option in Quad SPI, with data read from Quad SPI, with four dummy cycles, with fetch and continuous read.
Command: FAST READ QUAD I/O (EBh) - 8-BIT OPTION (0x30h)
- Write 0x0030_00EB to INSTRCTRL register.
- Write 0x0004_33F4 to INSTRFRAME register.
- Read INSTRFRAME register (dummy read) to synchronize system bus accesses.
-
Read data from the QSPI system bus memory space (0x040 00000–0x0500_0000).
Fetch is enabled, the address of the system bus read accesses is always used.
- Write LASTXFR bit in CTRLA register to '1'.
- Wait for INTFLAG.INSTREND to rise.
Example 8
Instruction in Quad SPI, with address in Quad SPI, without option, with data read from Quad SPI, with two dummy cycles, with fetch.
Command: HIGH-SPEED READ (0Bh)
- Write 0x0000_000B to INSTRCTRL register.
- Write 0x0002_20B6 to INSTRFRAME register.
- Read INSTRFRAME register (dummy read) to synchronize system bus accesses.
-
Read data in the QSPI system bus memory space (0x040 00000–0x0500_0000).
Fetch is enabled, the address of the system bus read accesses is always used.
- Write LASTXFR bit in CTRLA register to '1'.
- Wait for INTFLAG.INSTREND to rise.
