參數(shù)資料
型號: MC72000
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: Integrated Bluetooth Radio
中文描述: 集成藍(lán)牙無線
文件頁數(shù): 100/156頁
文件大?。?/td> 1782K
代理商: MC72000
100
MC72000 Advance Information Data Sheet
Go to: www.freescale.com
MOTOROLA
Hardware Functional Description
TFWM[3:0]—Transmit FIFO Empty WaterMark
This bit field controls the threshold at which the transmit FIFO empty flag (TFE) is set. TFE is set
whenever the data level in the TXFIFO falls below the selected threshold. Table 49 shows TFWM[2:0]
bit field encoding and Table 50 shows the status of TFE for all data levels of the TXFIFO.
Table 49. TFWM[3:0] Encoding
Table 48. Status of Receive FIFO Full Flag
Receive FIFO Watermark
(RFWM)
Number of data in RXFIFO
0
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
0
0
0
1
1
1
1
1
1
0
0
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
Bits
Description
0000
0001
Reserved
TFE set when there is 1 empty slot in TXFIFO (default).
Transmit FIFO empty is set when TXFIFO <= 7 data.
TFE set when there are 2 or more empty slots in TXFIFO.
Transmit FIFO empty is set when TXFIFO <= 6 data.
TFE set when there are 3 or more empty slots in TXFIFO.
Transmit FIFO empty is set when TXFIFO <= 5 data.
TFE set when there are 4 or more empty slots in TXFIFO.
Transmit FIFO empty is set when TXFIFO <= 4 data.
TFE set when there are 5 or more empty slots in TXFIFO.
Transmit FIFO empty is set when TXFIFO <= 3 data.
TFE set when there are 6 or more empty slots in TXFIFO.
Transmit FIFO empty is set when TXFIFO <= 2 data.
TFE set when there are 7 or more empty slots in TXFIFO.
Transmit FIFO empty is set when TXFIFO = 1 data.
TFE set when there are 8 empty slots in TXFIFO.
Transmit FIFO empty is set when TXFIFO = 0 data.
0010
0011
0100
0101
0110
0111
1000
Table 50. Status of Transmit FIFO Empty Flag
Transmit FIFO Watermark
(TFWM)
Number of data in TXFIFO
0
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
1
1
0
0
1
1
1
1
0
0
0
1
1
1
0
0
0
0
1
1
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
F
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