MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 353

• Manufacturer Part Number: MCF5272VF66
• Manufacturer: Freescale

Specifications of MCF5272VF66

• Family Name: MCF5xxx
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 66MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 3.3V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 196
• Package Type: MA-BGA
• Lead Free Status / RoHS Status: Not Compliant

14.5.7
The command RAM is accessed using the upper byte of QDR. The QSPI cannot modify information in
command RAM.
There are 16 bytes in the command RAM. Each byte is divided into two fields. The chip select field enables
external peripherals for transfer. The command field provides transfer operations.
Figure 14-11
Table 14-7
1
Freescale Semiconductor
In order to keep the chip setects asserted for all transfers, the QWR[CSIV] bit must be set to control the level that the chip
selects return to after the first transfer.
11–8
Bits
7–0
15
14
13
12
Address
Reset
Field
R/W
gives QCR field descriptions.
Command RAM Registers (QCR0–QCR15)
shows the command RAM register.
CONT
QSPI_CS
The command RAM is accessed only using the most significant byte of
QDR and indirect addressing based on QAR[ADDR].
15
CONT
BITSE
Name
DSCK
DT
—
BITSE
MCF5272 ColdFire
14
Figure 14-11. Command RAM Registers (QCR0–QCR15)
Continuous.
0 Chip selects return to inactive level defined by QWR[CSIV] when transfer is complete.
1 Chip selects remain asserted between transfers for a transfer of up to 16 words of data.
Bits per transfer enable.
0 Eight bits
1 Number of bits set in QMR[BITS]
Delay after transfer enable.
0 Default reset value.
1 The QSPI provides a variable delay at the end of serial transfer to facilitate interfacing with
Chip select to QSPI_CLK delay enable.
0 Chip select valid to QSPI_CLK transition is one-half QSPI_CLK period.
1 QDLYR[QCD] specifies the delay from QSPI_CS valid to QSPI_CLK.
Peripheral chip selects. Used to select an external device for serial data transfer. More than one
chip select may be active at once, and more than one device can be connected to each chip
select. Bits 11–8 map directly to QSPI_CS[3:0], respectively. If it is desired to use those bits as
a chip select value, then an external demultiplexor must be connected to the QSPI_CS[3:0] pins.
Reserved, should be cleared.
peripherals that have a latency requirement. The delay between transfers is determined by
QDLYR[DTL].
DT
13
Table 14-7. QCR0–QCR15 Field Descriptions
DSCK
12
®
Integrated Microprocessor User’s Manual, Rev. 3
11
NOTE
QSPI_CS
QAR[ADDR]
Write Only
Undefined
Description
8
Queued Serial Peripheral Interface (QSPI) Module
7
–
0
14-15
1