參數(shù)資料
型號(hào)： 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)： 61/156頁
文件大?。?/td> 1782K
代理商： MC72000
MOTOROLA
MC72000
Advance Information Data Sheet
Go to: www.freescale.com
61
TXLEVEL[7:0]—Transmit Buffer Level
When the number of free bytes in the transmit FIFO buffer exceeds the value specified by TXLEVEL,
an interrupt is generated.
7.2.5.4.3
UART CTS Level Control Register (UCTS)
UCTS sets the threshold for the CTS control flow signal. If the remote UART continues to send limited
amounts of data after detecting the deasserted CTS signal, the local receive buffer can handle the additional
data if CTS_LEVEL is set to a suitable value.
CTS_LEVEL[7:0]—CTS Buffer Level
When the number of bytes in the receiver (RX) FIFO exceeds this value, the CTS signal is deasserted.
7.2.5.5 UART Baud Rate Divider Register (UBR)
The fractional divider registers are used to select the receive and transmit baud rate. The following sections
describe the fractional divider registers.
The FRACDIV_DIV register is used to select the divisor for the fractional division divider. See
Section 7.2.3, “Fractional Divider,” for an explanation of the value to be written to the register.
The FRACDIV_INC register is used to select the modulus value for the fractional division divider. See
Section 7.2.3, “Fractional Divider,” for an explanation of the value to be written to the register.
UBRINC — INC Value
This value is used to select the baud rate. See Section 7.2.3, “Fractional Divider,” for more information.
UBRMOD — MOD Value
This value is used to select the baud rate. See Section 7.2.3, “Fractional Divider,” for more information.
UCTSBase + $014
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R
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RST
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R
W
CTS_LEVEL
CTS_LEVEL
0
RST
0
0
0
0
0
0
0
= writes have no effect and terminate without transfer error exception
UBR Base + $018
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UBRINC
UBRINC
0
23
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R
W
RST
0
0
0
0
0
0
0
0
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0
15
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0
R
W
UBRMOD
UBRMOD
0
RST
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= writes have no effect and terminate without transfer error exception
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
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