Queued Serial Multi-Channel Module
MPC561/MPC563 Reference Manual, Rev. 1.2
15-24
Freescale Semiconductor
Refer to
Section 15.6.5, “Master Mode Operation
” for more information on the command RAM.
15.6.3
QSPI Pins
Seven pins are associated with the QSPI. When not needed by the QSPI, they can be configured for
general-purpose I/O.
identifies the QSPI pins and their functions. Register DDRQS
determines whether the pins are designated as input or output. The user must initialize DDRQS for the
QSPI to function correctly.
MSB
0
1
2
3
4
5
6
LSB
7
CONT
BITSE
DT
DSCK
PCS3
PCS2
PCS1
PCS0
1
1
—
—
—
—
—
—
—
—
CONT
BITSE
DT
DSCK
PCS3
PCS2
PCS1
PCS0
1
Command Control
Peripheral Chip Select
The PCS0 bit represents the dual-function PCS0/SS.
Figure 15-17. CR[0:F] — Command RAM 0x30 51C0, 0x30 51DF
Table 15-19. Command RAM Bit Descriptions
Bits
Name
Description
0
CONT
Continue
0 Control of chip selects returned to PORTQS after transfer is complete.
1 Peripheral chip selects remain asserted after transfer is complete.
1
BITSE
Bits per transfer enable
0 Eight bits
1 Number of bits set in BITS field of SPCR0.
2
DT
Delay after transfer
0 Delay after transfer is 17
÷
f
SYS
.
1 SPCR1 DTL[7:0] specifies delay after transfer PCS valid to SCK.
3
DSCK
PCS to SCK Delay
0 PCS valid to SCK delay is one-half SCK.
1 SPCR1 DSCKL[6:0] specifies delay from PCS valid to SCK.
4:7
PCS[3:0] Peripheral chip selects. Use peripheral chip-select bits to select an external device for serial data transfer. More
than one peripheral chip select may be activated at a time, and more than one peripheral chip can be connected
to each PCS pin, provided proper fanout is observed. PCS0 shares a pin with the slave select (SS) signal, which
initiates slave mode serial transfer. If SS is taken low when the QSPI is in master mode, a mode fault occurs.
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...