PXD10RM Datasheet, PDF (1018/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Table 30-9. QSPI_MCR Field Descriptions (continued)
Field
Description
CLR_RXF
SMPL_PT
QMODE
VMID
HALT
Clear RX FIFO. Depending from the QMODE bit CLR_RXF is used to invalidate the RX FIFO or the
RX Buffer.
0 No action
1 (QMODE bit cleared): Read and write pointers of the RX FIFO are reset to 0.
QSPI_SPISR[RXCTR] and QSPI_SPISR[POPNXTPTR] are reset to 0.
1 (QMODE bit set): Read and write pointers of the RX Buffer are reset to 0. QSPI_RBSR[RDBFL]
is reset to 0.
SMPL_PT — Only applicable if QMODE is cleared. Sample Point. SMPL_PT allows the host
software to select when the QuadSPI Master samples SI in Modified Transfer Format. The table
below lists the various delayed sample points.
00 0 system clock cycles
01 1 system clock cycle
10 2 system clock cycles
11 Reserved
QMODE — QuadSPI Mode: When this bit is cleared the QuadSPI block is in SPI Master or SPI Slave
Mode. When this bit is set the QuadSPI block is in Serial Flash Mode.
0 Module is in SPI Master or SPI Slave Mode
1 Module is in SFM Mode
VMID — Vendor Model ID. Only applicable if QMODE is set.
0000 Reserved
0001 Winbond
othersReserved
Halt. Only applicable if QMODE is cleared. The HALT bit provides a mechanism by software to start
and stop QuadSPI transfers. See Section 30.5.2.1, Start and Stop of SPI Transfers” for details about
the operation of this bit.
0 Start transfers
1 Stop transfers
30.4.3.3 Transfer Count Register (QSPI_TCR)
The QSPI_TCR contains a counter that indicates the number of SPI transfers made. The transfer counter
is intended to assist in queue management.
Address: QSPI_BASE + 0x008
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
R
SPI_TCNT
W
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
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 30-3. Transfer Count Register (QSPI_TCR)
30-14
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor