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參數(shù)資料
| 型號(hào)： | MX805LH |
| 英文描述： | RF/Baseband Circuit |
| 中文描述： | 射頻/基帶電路 |
| 文件頁數(shù)： | 11/24頁 |
| 文件大?。?/td> | 532K |
| 代理商： | MX805LH |
Sub-Audio Signaling Processor
5.2 Address/Commands
The first byte of a loaded data sequence is always recognized by the C-BUS as an Address/Command (A/C)
byte. Instruction and data transactions to and from this device consist of an Address/Command byte followed
by either:
(i) further instructions or data
(ii) a Status or data Reply
Instructions and data are loaded and transferred, via C-BUS, in accordance with the timing information in
Figure 9 and Figure 11.
Placing the Address Select input at a logic “0” will address MX805A #1, a logic “1” will address MX805A #2.
Table 4 and Table 5 show the list of A/C bytes relevant to the MX805A
Command Assignment
Address/Command (A/C) byte
Hex
General Reset
01
Write to Control Register
70
Page 11 of 24
MX805A
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4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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Doc. # 20480116.005
Data Bytes
Binary
MSB
LSB
00000001
01110000
+1 byte instruction to Control
Register
+1 byte reply from Status Register
+2 byte reply of CTCSS Rx Data
+2 byte instruction for Tx Frequency
and NRZ Tx/Rx baud rates
+1 byte binary data Reply
+1 byte binary data Command
+1 byte instruction for Tx Output
Read Status Register
Read CTCSS Rx Freq. Reg.
Write to CTCSS Tx Freq./NRZ
Baud Rate Reg.
Read NRZ Rx Data Reg.
Write to NRZ Tx Data Reg.
Write to Gain Set Reg.
71
72
73
01110001
01110010
01110011
74
75
76
01110100
01110101
01110110
Table 4: MX805A #1 C-BUS Address/Commands – (Address Select input at a logic “0”)
Command Assignment
Address/Command (A/C) byte
Hex
01
78
Data Bytes
Binary
MSB
LSB
General Reset
Write to Control Register
00000001
01111000
+1 byte instruction to Control
Register
+1 byte reply from Status Register
+2 byte reply of CTCSS Rx Data
+2 byte instruction for Tx Frequency
and NRZ Tx/Rx baud rates
+1 byte binary data Reply
+1 byte binary data Command
+1 byte instruction for Tx Output
Read Status Register
Read CTCSS Rx Freq. Reg.
Write to CTCSS Tx Freq./NRZ
Baud Rate Reg.
Read NRZ Rx Data Reg.
Write to NRZ Tx Data Reg.
Write to Gain Set Reg.
79
7A
7B
01111001
01111010
01111011
7C
7D
7E
01111100
01111101
01111110
Table 5: MX805A #2 C-BUS Address/Commands – (Address Select input at a logic “1”)
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