____________________________________________________ DS34T101, DS34T102, DS34T104, DS34T108
297 of 366
Register Name:
TLS2
Register Description:
Transmit Latched Status Register 2 (HDLC)
Register Address:
base address + 0x644
Bit #
7
6
5
4
3
2
1
0
Name
-
TFDLE
TUDR
TMEND
TLWMS
TNFS
Default
0
Bit 4: Transmit FDL Register Empty (TFDLE). T1 Mode Only. This latched status bit is set when the TFDL
register has shifted out all 8 bits. Useful if the user wants to manually use the TFDL register to send messages,
instead of using the HDLC or BOC controller circuits. TFDLE is cleared when written with a 1. When TFDLE is set it
can cause an interrupt request if the corresponding interrupt enable bit is set in the
TIM2 register. See section
Bit 3: Transmit FIFO Underrun Event (TUDR). This latched status bit is set when the transmit HDLC controller
has terminated packet transmission because the FIFO buffer is empty
(TRTS2.TEMPTY=1). When this happens
the Tx HDLC automatically sends an abort. TUDR is cleared when written with a 1. When TUDR is set it can cause
an interrupt request if the corresponding interrupt enable bit is set in the
TIM2 register. See section
10.12.2.Bit 2: Transmit Message End Event (TMEND). This latched status bit is set when the transmit HDLC controller
has finished sending a message. TMEND is cleared when written with a 1. When TMEND is set it can cause an
interrupt request if the corresponding interrupt enable bit is set in the
TIM2 register. See section
10.12.2.Bit 1: Transmit FIFO Below Low Watermark Set Event (TLWMS). This latched status bit is set when
TRTS2.TLWM transitions from zero to one. TLWMS is cleared when written with a 1. When TLWMS is set it can
cause an interrupt request if the corresponding interrupt enable bit is set in the
TIM2 register. See section
10.12.2.Bit 0: Transmit FIFO Not Full Set Event (TNFS). This latched status bit is set when
TRTS2.TNF transitions from
zero to one. TNFS is cleared when written with a 1. When TNFS is set it can cause an interrupt request if the
corresponding interrupt enable bit is set in the
TIM2 register. See section
10.12.2.Register Name:
TLS3
Register Description:
Transmit Latched Status Register 3 (Synchronizer)
Register Address:
base address + 0x648
Bit #
7
6
5
4
3
2
1
0
Name
-
LOF
LOFD
Default
0
Bit 1: Loss of Frame (LOF). This real-time status bit indicates that the transmit synchronizer is searching for the
sync pattern in the incoming data stream.
0 = LOF not detected
1 = LOF detected
Bit 0: Loss Of Frame Synchronization Detect (LOFD). This latched status bit is set when the transmit
synchronizer is searching for the sync pattern in the incoming data stream. LOFD is cleared when written with a 1.
When LOFD is set it can cause an interrupt request if the corresponding interrupt enable bit is set in the
TIM3