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參數(shù)資料
| 型號(hào)： | EM78568 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8-BIT MICRO-CONTROLLER for FRS |
| 中文描述： | 8位微控制器為FRS |
| 文件頁數(shù)： | 30/54頁 |
| 文件大?。?/td> | 494K |
| 代理商： | EM78568 |
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EM78568
8-bit Micro-controller for FRS
__________________________________________________________________________________________________________________________________________________________________
* This specification are subject to be changed without notice.
07/28/2004 V3.5
If all the values are low, the power of tone generators will turn off .
TONE1(IOCD, 699.7Hz(0x0A0)
IOCE PAGE0) 772.1Hz(0x091)
Low group freq. 854.6Hz(0x083)
940.8Hz(0x077)
TONE2 (IOCA PAGE0) High group freq.
1203.8 (0X5D)
1332.8(0X54)
1
2
4
5
7
8
*
0
1473.1(0X4C)
3
6
9
#
1646.4(0X44)
A
B
C
D
PAGE1 (Control bits for DAC, DAC tone, Reference, VOX and P67 switch)
7
6
5
DAT/DAD
VREF
DATEN
VRSEL DAST/P67
R/W-0
R/W-0
R/W-0
R/W-0
Bit 0 ~ Bit 2 :
(undefined) not allowed to use
Bit 3(DAST/P67) : DAC enable control or P67 switch
0
switch DAO/P67 pin as normal I/O P67
1
enable DAC, enable DAC output buffer B1 and DAC output to DAO/P67 pin
When this bit is set by software, the DA converter will start converting and output to DAO/P67 pin. If user
clean this bit, DA converter will stop and DAO/P67 pin will be become normal I/O P67.
Also refer to bit 5(DATEN) for DAC power control.
Bit 4(VRSEL) : Reference voltage selection bit for Comparator circuit
0/1
VDD/2.5V from DAC
Also see Fig.13 in the next page.
Bit 5(DATEN) : DAC enable control
0/1
disable/enable DAC and its tone output buffer B2
When this bit is set by software, the DA converter will start converting and output to internal CTCSS
VTX3 end. If user clean this bit, DA converter will stop and DAO tone output buffer B2 is disabled.
Also refer to bit 3(DAST/P67) for DAC power control.
Bit 6(VREF) : Reference voltage selection bit for DA converter circuit
DAC reference setting is shown as following. Also see Fig.12 and Fig.13 in the next page.
ASW3 VREF DATEN DAST/P67 Function
1
x
1
x
select 2.5V ref, enable 2.5V ref, enable DAC,
0
1
1
x
enable buffer B2, buffer B2 output to CTCSS LPF
0
0
1
x
select VDD, disable 2.5V, enable DAC, enable buffer B2
x
1
0
1
select 2.5V ref, enable 2.5V ref, enable DAC, enable buffer B1,
buffer B1 output to DAO/P67 pin
x
0
0
1
select VDD, disable 2.5V, enable DAC, enable buffer B1, buffer B1
output to DAO/P67 pin
Ps. IOCE PAGE1 bit 2 (ASW3), IOCA PAGE1 bit 6 (VREF), IOCA PAGE1 bit 5 (DATEN),
IOCA PAGE1 bit 3 (DAST/P67)
4
3
2
-
1
-
0
-
R/W-0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EMA2 | Emitter common (dual digital transistors) |
| EMA3 | Emitter common (dual digital transistors) |
| EMA4 | General purpose (dual digital transistors) |
| EMB4 | General purpose (dual digital transistors) |
| EMA5 | Emitter common (dual digital transistors) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EM78569 | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-BIT MICRO-CONTROLLER |
| EM785830AA | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-BIT MICRO-CONTROLLER |
| EM785830AAM | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-BIT MICRO-CONTROLLER |
| EM785830AAP | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-BIT MICRO-CONTROLLER |
| EM785830AD | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-BIT MICRO-CONTROLLER |
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