PXD10RM Datasheet, PDF (1036/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Field
TRCTR
TRBFL
Table 30-29. QSPI_TBSR Field Descriptions
Description
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.
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.
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.
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
R0 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
R0 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
TXDATA
Description
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.
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 Section 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.
30-32
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor