Queued Serial Multi-Channel Module
MPC561/MPC563 Reference Manual, Rev. 1.2
15-60
Freescale Semiconductor
15.8.2.1
QSCI1 Control Register (QSCI1CR)
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LSB
15
Field
QTPNT
QTHFI QBHFI QTHEI QBHEI
—
QTE
QRE QTWE
QTSZ
SRESET
0000_0000_0000_0000
Addr
0x30 5028
Figure 15-31. QSCI1 Control Register (QSCI1CR)
Table 15-32. QSCI1CR Bit Descriptions
Bits
Name
Description
0:3
QTPNT
Queue transmit pointer. QTPNT is a 4-bit counter used to indicate the next data frame within the
transmit queue to be loaded into the SC1DR. This feature allows for ease of testability. This field
is writable in test mode only; otherwise it is read-only.
4
QTHFI
Receiver queue top-half full interrupt. When set, QTHFI enables an SCI1 interrupt whenever the
QTHF flag in QSCI1SR is set. The interrupt is blocked by negating QTHFI. This bit refers to the
queue locations SCRQ[0:7].
0 QTHF interrupt inhibited
1 Queue top-half full (QTHF) interrupt enabled
5
QBHFI
Receiver queue bottom-half full interrupt. When set, QBHFI enables an SCI1 interrupt whenever
the QBHF flag in QSCI1SR is set. The interrupt is blocked by negating QBHFI. This bit refers to
the queue locations SCRQ[8:15].
0 QBHF interrupt inhibited
1 Queue bottom-half full (QBHF) interrupt enabled
6
QTHEI
Transmitter queue top-half empty interrupt. When set, QTHEI enables an SCI1 interrupt
whenever the QTHE flag in QSCI1SR is set. The interrupt is blocked by negating QTHEI. This bit
refers to the queue locations SCTQ[0:7].
0 QTHE interrupt inhibited
1 Queue top-half empty (QTHE) interrupt enabled
7
QBHEI
Transmitter queue bottom-half empty interrupt. When set, QBHEI enables an SCI1 interrupt
whenever the QBHE flag in QSCI1SR is set. The interrupt is blocked by negating QBHEI. This
bit refers to the queue locations SCTQ[8:15].
0 QBHE interrupt inhibited
1 Queue bottom-half empty (QBHE) interrupt enabled
8
—
Reserved
9
QTE
Queue transmit enable. When set, the transmit queue is enabled and the TDRE bit should be
ignored by software. The TC bit is redefined to indicate when the entire queue is finished
transmitting. When clear, the SCI1 functions as described in the previous sections and the bits
related to the queue (Section 5.5 and its subsections) should be ignored by software with the
exception of QTE.
0 Transmit queue is disabled
1 Transmit queue is enabled
Summary of Contents for MPC561
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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...
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Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
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