參數(shù)資料
型號(hào): EM78P568
廠商: ELAN Microelctronics Corp .
英文描述: 8-BIT OTP MICRO-CONTROLLER
中文描述: 8位檢察官微控制器
文件頁數(shù): 38/61頁
文件大?。?/td> 568K
代理商: EM78P568
EM78P568
8-bit OTP Micro-controller
__________________________________________________________________________________________________________________________________________________________________
* This specification are subject to be changed without notice.
01/31/2004 V4.7
DAST/P67
PORT67
DAO/P67
DATEN
MUX
2.5V
ref
VDD
REFSEL
REFEN
B2
B1
2R
2R
R
2R
2R
R
8-bit
DAC
input
data
buffer
(This circuit is from Comparator)
VRSEL
To ladder resistors
CMPEN
(This circuit is from CTCSS)
MUX
ASW3
VTX3
VRX3
To Sub-Audio LPF
MUX
DAC input
Fig.12 D/A converter (DAC)
Fig.13 DAC reference voltage control logic
Bit 7 (DAT/DAD) : Programmable D/A tone generation or D/A input data enable control
0
Enable D/A input data and disable D/A tone generation (also stop to D/A tone generation)
1
Enable Programmable D/A tone generation and disable D/A input data
IOCB (PORTB I/O control)
PAGE0 (PORTB I/O control register)
7
6
5
4
IOCB7
IOCB6
IOCB5
IOCB4
IOCB3
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
Bit 0 ~ Bit 7 (IOCB0 ~ IOCB7) : PORTB(0~7) I/O direction control register
0
put the relative I/O pin as output
1
put the relative I/O pin into high impedance
3
2
1
0
IOCB2
R/W-1
IOCB1
R/W-1
IOCB0
R/W-1
ASW3
DATEN
DAST/P67
VREF
REFSEL
REFEN
CMPEN
VRSEL
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