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)： 87/156頁
文件大?。?/td> 1782K
代理商： MC72000
MOTOROLA
MC72000
Advance Information Data Sheet
Go to: www.freescale.com
87
Figure 56. Receive Data Path (RSHFD=1)
7.4.5.2.7
SSI Transmit and Receive Control Registers (STXCR, SRXCR)
STXCR and SRXCR are 16-bit, read/write control registers used to direct the operation of the SSI. These
registers control the SSI clock generator bit and frame sync rates, word length, and number of words per
frame for the serial data. The STXCR register is dedicated to the transmit section. The SRXCR register is
dedicated to the receive section except in synchronous mode, where the STXCR register controls both the
receive and transmit sections. Power-on reset clears all STXCR and SRXCR bits. SSI reset does not affect
the STXCR and SRXCR bits. The control bits are described in the following paragraphs. Although the bit
patterns of the SRXCR and SCTRX registers are the same, the contents of these two registers can be
programmed differently.
Figure 57. STXCR Register Diagram
Figure 58. SRXCR Register Diagram
PSR—Prescaler Range
This bit controls a fixed divide-by-8 prescaler in series with the variable prescaler. It extends the range
of the prescaler for those cases where a slower bit clock is desired.
1 = When the PSR bit is set, the fixed divide-by-eight prescaler is operational. This allows a 128 kHz
master clock to be generated for Motorola MC1440x series CODECs. The maximum internally
generated bit clock frequency is F
IP_CLK
/(2x2) and the minimum internally generated bit clock
frequency is F
IP_CLK
/(4
× 2 ×
8
×
256 x 2).
Base + 0x08
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
W
PSR
WL[1:0]
DC[4:0]
PM[7:0]
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Base + 0x0A
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
W
PSR
WL[1:0]
DC[4:0]
PM[7:0]
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
SRX
15
0
16 bits
8
7
15
0
SRXD
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
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