參數(shù)資料
型號: QSMRM
英文描述: QSMRM QSM Queued Serial Module Reference Manual
中文描述: QSMRM QSM排隊串行模塊參考手冊
文件頁數(shù): 105/112頁
文件大?。?/td> 1496K
代理商: QSMRM
QSM
REFERENCE MANUAL
MOTOROLA
-9
DSCKL — Delay before SCK
This bit determines the length of time the QSPI delays from peripheral chip-select
(PCS) valid to SCK transition for serial transfers in which the command control bit,
DSCK of the QSPI RAM, equals one.
PCS to SCK Delay = [DSCKL/System Clock Frequency]
where DSCKL equals {1,2,3,... 127}.
DTL — Length of Delay after Transfer
These bits determine the length of time that the QSPI delays after each serial transfer
in which the command control bit, DT of the QSPI RAM, equals one.
Delay after Transfer = [(32 * DTL)/System Clock Frequency]
where DTL equals {1,2,3,... 255}.
SPIFIE — SPI Finished Interrupt Enable
1 = QSPI interrupts enabled
0 = QSPI interrupts disabled
WREN — Wrap Enable
1 = Wraparound mode enabled
0 = Wraparound mode disabled
WRTO — Wrap To
1 = Wrap to address found in NEWQP
0 = Wrap to address $0
Bit 12 — Not Implemented
ENDQP — Ending Queue Pointer
This field determines the last absolute address in the queue to be completed by the
QSPI.
Bits [7:4] — Not Implemented
NEWQP — New Queue Pointer Value
NEWQP determines which queue entry the QSPI transfers first.
* SPSR — QSPI Status Register
SPCR2
— QSPI Control Register 2
15
14
13
SPIFIE
WREN
WRTO
RESET:
0
0
0
$YFFC1C
1
NEWQP
12
0
11
10
9
8
7
0
6
0
5
0
4
0
3
2
0
ENDQP
0
0
0
0
0
0
0
0
0
0
0
0
0
SPCR3
— QSPI Control Register 3
15
14
13
0
0
0
$YFFC1E
12
0
11
0
10
9
8
7
0
LOOP
Q
HMIE
HALT
SPSR*
RESET:
0
0
0
0
0
0
0
0
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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