NXP Semiconductors MPC5606S - TX Buffer Data Register (QSPI_TBDR)

Quad Serial Peripheral Interface (QuadSPI)
MPC5606S Microcontroller Reference Manual, Rev. 7
1024 Freescale Semiconductor
30.4.3.17 TX Buffer Data Register (QSPI_TBDR)
The QSPI_TBDR register provides access to the circular TX Buffer. This buffer provides the data written
into it as write data for the page programming commands to the serial flash device. Refer to Table 30-45
for the byte ordering scheme.
30.4.3.18 AMBA Control Register (QSPI_ACR)
The QSPI_ACR register defines the command that is used for following AHB commands. The read
commands allowed are given in
30.7.1, Supported Instruction Codes in Winbond Devices. The execution
of the command itself is triggered by an AHB read to the address range assigned to the memory-mapped
serial flash data. For further details refer to
Section 30.6.7, Command arbitration—SFM mode only.
Table 30-29. QSPI_TBSR field descriptions
Field Description
TRCTR Transmit Counter. This field indicates how many bytes have been written into the TX Buffer by host
accesses. It is reset to 0 when a 1 is written into the QSPI_MCR[CLR_TXF] bit. It is incremented
on each write access to the QSPI_TBDR register by the number of bytes pushed onto the TX Buffer.
When it is not cleared the TRCTR field wraps around to 0. Refer to
Section 30.4.3.17, TX Buffer
Data Register (QSPI_TBDR), for details.
TRBFL TX Buffer Fill Level. The TRBFL field contains the number of bytes available in the TX Buffer for the
QuadSPI module to transmit to the serial flash device.
Address: QSPI_BASE +
0x154
Write: QSPI_MCR[QMODE] = 1 and QSPI_SFMSR[TXFULL] = 0
32-bit write access required
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W TXDATA[31:16]
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W TXDATA[15:0]
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 30-17. TX Buffer (QSPI_TBDR)
Table 30-30. QSPI_TBDR field descriptions
Field Description
TXDATA TX Data. On write access the data are written into the next available entry of the TX Buffer and the
QPSI_TBSR[TRBFL] field is updated accordingly.