參數(shù)資料
型號: DS3160
元件分類: 通信及網(wǎng)絡(luò)
英文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù): 78/107頁
文件大?。?/td> 592K
代理商: DS3160
DS3160
78 of 107
CRC, abort sequence detected, packet too small, not an integral number of octets, or an overrun occurred).
This bit is cleared when read and is not set again until another message end is detected. The setting of this
bit can cause a hardware interrupt to occur if the RPE bit in the interrupt mask for the HSR (IHSR)
register is set to a 1 and the HDLC bit in the interrupt mask for the MSR (IMSR) register is set to a 1. The
interrupt is allowed to clear when this bit is read.
Bit 7/Transmit FIFO Underrun (TUDR).
This latched read-only event-status bit is set to a 1 each time
the transmit FIFO underruns and an abort is automatically sent. This bit is cleared when read and is not
set again until another underrun occurs (i.e., the FIFO has been written to and then allowed to empty
again). The setting of this bit can cause a hardware interrupt to occur if the TUDR bit in the interrupt
mask for the HSR (IHSR) register is set to a 1 and the HDLC bit in the interrupt mask for the MSR
(IMSR) register is set to a 1. The interrupt is allowed to clear when this bit is read.
Bit 8 to 11/Transmit FIFO Level Bits 0 to 3 (TFL0 to TFL3).
These read-only real-time status bits
indicate the current depth of the transmit FIFO with a 16-byte resolution. These status bits cannot cause a
hardware interrupt.
TFL3
TFL2
TFL1
TFL0
TRANSMIT FIFO LEVEL
(BYTES)
Empty to 15
16 to 31
32 to 47
48 to 63
64 to 79
80 to 95
96 to 111
112 to 127
128 to 143
144 to 159
160 to 175
176 to 191
192 to 207
208 to 223
224 to 239
240 to 256
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Bit 12/Transmit FIFO Empty (TEMPTY).
This read-only real-time status bit is set to a 1 when the
transmit FIFO is empty. It is cleared when the transmit FIFO contains one or more bytes. This status bit
cannot cause a hardware interrupt.
Bit 13/Receive FIFO Overrun (ROVR).
This latched read-only event-status bit is set to a 1 each time
the receive FIFO overruns. This bit is cleared when read and is not set again until another overrun occurs
(i.e., the FIFO has been read from and then allowed to fill up again). The setting of this bit can cause a
hardware interrupt to occur if the ROVR bit in the interrupt mask for the HSR (IHSR) register is set to a 1
and the HDLC bit in the interrupt mask for the MSR (IMSR) register is set to a 1. The interrupt is allowed
to clear when this bit is read.
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