mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 408

• Manufacturer Part Number: mcf5282
• Manufacturer: Freescale Semiconductor, Inc

Queued Serial Peripheral Interface (QSPI)
22-4
MSTR
13–10
CPOL
CPHA
BAUD
Field
BITS
7–0
15
14
9
8
Master mode enable.
0 Reserved, do not use.
1 The QSPI is in master mode. Must be set for the QSPI module to operate correctly.
Reserved, must be cleared.
Transfer size. Determines the number of bits to be transferred for each entry in the queue.
Clock polarity. Defines the clock polarity of QSPI_CLK.
0 The inactive state value of QSPI_CLK is logic level 0.
1 The inactive state value of QSPI_CLK is logic level 1.
Clock phase. Defines the QSPI_CLK clock-phase.
0 Data captured on the leading edge of QSPI_CLK and changed on the following edge of QSPI_CLK.
1 Data changed on the leading edge of QSPI_CLK and captured on the following edge of QSPI_CLK.
Baud rate divider. The baud rate is selected by writing a value in the range 2–255. A value of zero disables the QSPI.
A value of 1 is an invalid setting. The desired QSPI_CLK baud rate is related to the internal bus clock and
QMR[BAUD] by the following expression:
QMR[BAUD] = f
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
sys/
/ (2 × [desired QSPI_CLK baud rate])
Table 22-3. QMR Field Descriptions
0001–0111
BITS
0000
1000
1001
1010
1011
1100
1101
1110
1111
Description
Bits per Transfer
Reserved
16
10
11
12
13
14
15
8
9
Freescale Semiconductor