EM78P569 View Datasheet(PDF) - ELAN Microelectronics
Part Name
Description
MFG CO.
'EM78P569' PDF : 58 Pages View PDF
EM78P569
8-bit OTP Micro-controller
IOCA (Reserved)
PAGE0(Unused)
PAGE1 DAC control
7
6
5
4
3
2
1
0
X
VREF
X
X DAST/P67 X
X
X
-
R/W-0
-
-
R/W-0
-
-
-
Bit 0 ~ Bit 2 : Unused. These 3 bits are 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.
Bit 4 ~ Bit 5 : Unused. These two bits are not allowed to use.
Bit 6(VREF) : Reference voltage selection bit for DA converter circuit
DAC reference setting is shown as following. Also see Fig.12 in the next page.
VREF DAST/P67 Function
x
0 disable 2.5V, disable DAC
1
1 select 2.5V ref, enable 2.5V ref, enable DAC, enable output to
DAO/P67 pin
0
1 select VDD, disable 2.5V, enable DAC, enable output to DAO/P67
pin
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to be changed without notice.
33
8/19/2004 V4.4
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