EM78P568 Datasheet, PDF (33/61 Pages) ELAN Microelectronics Corp – 8-BIT OTP MICRO-CONTROLLER

EM78P568
8-bit OTP Micro-controller
The relation between these registers is shown as follows in Fig.10.
Ps. VRSEL bit is in IOCA PAGE1 bit 4.
Name
P62S
P63S
P64S
Register bit location
IOC6 PAGE1 bit 2
IOC6 PAGE1 bit 3
IOC6 PAGE1 bit 4
CMP1/P62
CMP2/P63
CMP3/P64
VDD
MUX
CMP1
PORT62
P62S
MUX
CMP2
PORT63
P63S
MUX
CMP3
PORT64
P64S
MUX
2
CMPS1
CMPS0
1
0 ^MUX
2.5V _2.5V MUX ^VR
ref
REFEN
VRSEL
(This ckt is form DAC)
1/2R
11111
R
11110
R MUX
CMPREF
00000
1/2R
5
CMP_B4 to CMP_B0
+
CMPFLAG
-
CMPEN
Name
CMPEN
CMPS1 ~ CMPS0
CMP_B4 ~ CMP_B0
VRSEL
Register bit location
IOC5 PAGE1 bit 7
IOC5 PAGE1 bit 6 ~ 5
IOC5 PAGE1 bit 4 ~ 0
IOCA PAGE1 bit 4
Name
Register bit location
CMPREF RA PAGE0 bit 1
CMPFLAG RA PAGE0 bit 2
Fig.10 The comparator circuit
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* This specification are subject to be changed without notice.
01/31/2004 V4.7