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： 集成藍牙無線
文件頁數(shù)： 112/156頁
文件大?。?/td> 1782K
代理商： MC72000
112
MC72000 Advance Information Data Sheet
Go to: www.freescale.com
MOTOROLA
Hardware Functional Description
7.4.6.1.2.1
Network Mode Transmit
The transmit portion of the SSI is enabled when the SSIEN and the TE bits in the SCR2 are both set.
However, when the TE bit is set, the transmitter is enabled only after detection of a new frame boundary.
Software has to find the start of the next frame (by checking the TFS bit of the SCSR register). Do the
following steps for a normal start-up sequence for transmission:
1. Set the SCSR, STXCR, SCR2, and SOR registers to select network mode operation, define
the transmit clock, transmit frame sync, and frame structure required for proper system
operation.
2. Enable SSI (SSIEN = 1).
3. Enable TXFIFO (TFEN=1) and configure the transmit watermark (TFWM=n) if this
TXFIFO is used.
4. Write data to transmit data register (STX).
5. Enable transmit interrupts.
6. Set the TE bit (TE = 1) to enable the transmitter on the next frame sync boundary.
The transmitter timing for an 8-bit word with continuous clock, FIFO disabled, five words per frame sync,
in network mode is shown in Figure 74. The explanatory notes for the transmit portion of the figure are
shown in Table 56.
Figure 74. Network Mode Transmit Timing
TS 0
TS 1
TS 2
1
TS 3
TS 4
TS 0
time-slot
Continuous STCK
internal word clock
STFS
TFS bit of SCSR register
TDE status bit/interrupt
STX register
STSR register
TXSR register
STXD
2
4
5
3
4
Valid
Indefinite transition depends on SW interrupt processing
Invalid
F
For More Information On This Product,
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