Queued Serial Multi-Channel Module
MPC561/MPC563 Reference Manual, Rev. 1.2
15-10
Freescale Semiconductor
15.5
QSMCM Pin Control Registers
lists the three QSMCM pin control registers.
The QSMCM uses 11 pins. These pins, when not being used by the serial sub-systems, form a parallel port
on the MCU.
The port QS pin assignment register (PQSPAR) governs the usage of QSPI pins. Clearing a bit assigns the
corresponding pin to general-purpose I/O; setting a bit assigns the pin to the QSPI.
PQSPAR does not affect operation of the SCI. When the SCIx transmitter is disabled, TXDx is a discrete
output; when the SCIx receiver is disabled, RXDx is a discrete input. When the SCIx transmitter or
receiver is enabled, the associated TXDx or RXDx pin is assigned its SCI function.
The port QS data direction register (DDRQS) determines whether QSPI pins are inputs or outputs.
Clearing a bit makes the corresponding pin an input; setting a bit makes the pin an output. DDRQS affects
both QSPI function and I/O function.
summarizes the effect of DDRQS bits on QSPI pin
function.
DDRQS does not affect SCI pin function. TXDx pins are always outputs, and RXDx pins are always
inputs, regardless of whether they are functioning as SCI pins or as PORTQS pins.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LSB
15
Field
—
ILQSPI
SRESET
0000_0000_0000_0000
Addr
0x30 5006
Figure 15-6. QSPI_IL — QSPI Interrupt Level Register
Table 15-6. QSPI_IL Bit Descriptions
Bits
Name
Description
0:10
—
Reserved
11:15
ILQSPI
Interrupt level of SPI
00000lowest interrupt level request (level 0)
11111highest interrupt level request (level 31)
Table 15-7. QSMCM Pin Control Registers
Address
Register
0x30 5014
QSMCM Port Data Register (PORTQS)
See Section 15.5.1, “Port QS Data Register (PORTQS) for bit descriptions.
0x30 5016
PORTQS Pin Assignment Register (PQSPAR)
See <XrefBlue>Table 15-10 for bit descriptions.
0x30 5017
PORTQS Data Direction Register (DDRQS)
See <XrefBlue>Table 15-10 for bit descriptions.
Summary of Contents for MPC561
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Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
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