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(yè)數(shù)： 54/61頁(yè)
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
VII.12 4-bit Comparator
PORT62
MUX
CMP1
P62S
PORT63
MUX
CMP2
P63S
PORT64
MUX
CMP3
P64S
MUX
CMPS1
CMPS0
+
-
MUX
CMPREF
CMPFLAG
CMPEN
0
1
2
CMP1/P62
CMP2/P63
CMP3/P64
MUX
1/2R
11111
R
11110
R
1/2R
5
CMP_B4 to CMP_B0
00000
VRSEL
MUX
2.5V
ref
2.5V
REFEN
(This ckt is form DAC)
VR
VDD
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
CMPREF
CMPFLAG
Register bit location
RA PAGE0 bit 1
RA PAGE0 bit 2
Name
P62S
P63S
P64S
Register bit location
IOC6 PAGE1 bit 2
IOC6 PAGE1 bit 3
IOC6 PAGE1 bit 4
This comparator is not only a single comparator. It consists of 16-R resistor string, 3-channel input and optional
external comparison reference source input. The 16-R resistor string acts as 16-level voltage divider which top
voltage reference can be selected from VDD or 2.5V ref. Use above register bits to set the whole job. This
comparator is used to some applications such as voltage detection, RSSI level, sensor output level and other slow
signal level transition detection and so on. This comparator can be called a simple 4-bit low speed ADC but the
sampling time is decided by software. For AC frequency detection, it is limited by it output comparator structure.
We suggest the detected AC frequency below 1kHz.
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