MCF5272 ColdFire Integrated Microproce" />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉(h脿o)锛� MCF5272VM66J
寤犲晢锛� Freescale Semiconductor
鏂囦欢闋�(y猫)鏁�(sh霉)锛� 283/544闋�(y猫)
鏂囦欢澶у皬锛� 0K
鎻忚堪锛� IC MCU 32BIT 66MHZ 196-MAPBGA
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 126
绯诲垪锛� MCF527x
鏍稿績铏曠悊鍣細 Coldfire V2
鑺珨灏哄锛� 32-浣�
閫熷害锛� 66MHz
閫i€氭€э細 EBI/EMI锛屼互澶恫(w菐ng)锛孖²C锛孲PI锛孶ART/USART锛孶SB
澶栧湇瑷�(sh猫)鍌欙細 DMA锛學DT
杓稿叆/杓稿嚭鏁�(sh霉)锛� 32
绋嬪簭瀛樺劜(ch菙)鍣ㄥ閲忥細 16KB锛�4K x 32锛�
绋嬪簭瀛樺劜(ch菙)鍣ㄩ(l猫i)鍨嬶細 ROM
RAM 瀹归噺锛� 1K x 32
闆诲 - 闆绘簮 (Vcc/Vdd)锛� 3 V ~ 3.6 V
鎸暕鍣ㄥ瀷锛� 澶栭儴
宸ヤ綔婧害锛� 0°C ~ 70°C
灏佽/澶栨锛� 196-LBGA
鍖呰锛� 鎵樼洡(p谩n)
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Queued Serial Peripheral Interface (QSPI) Module
MCF5272 ColdFire Integrated Microprocessor User鈥檚 Manual, Rev. 3
Freescale Semiconductor
14-15
14.5.7
Command RAM Registers (QCR0鈥換CR15)
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.
NOTE
The command RAM is accessed only using the most significant byte of
QDR and indirect addressing based on QAR[ADDR].
Figure 14-11 shows the command RAM register.
15
14
13
12
11
8
7
0
Field
CONT
BITSE
DT
DSCK
QSPI_CS
鈥�
Reset
Undefined
R/W
Write Only
Address
QAR[ADDR]
Figure 14-11. Command RAM Registers (QCR0鈥換CR15)
Table 14-7 gives QCR field descriptions.
Table 14-7. QCR0鈥換CR15 Field Descriptions
Bits
Name
Description
15
CONT
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.1
1 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.
14
BITSE
Bits per transfer enable.
0 Eight bits
1 Number of bits set in QMR[BITS]
13
DT
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
peripherals that have a latency requirement. The delay between transfers is determined by
QDLYR[DTL].
12
DSCK
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.
11鈥�8
QSPI_CS
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鈥�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.
7鈥�0
鈥�
Reserved, should be cleared.
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