參數資料
型號: pic16ce624
廠商: Microchip Technology Inc.
英文描述: OTP 8-Bit CMOS MCU with EEPROM Data Memory(8位OTP CMOS微控制器)
中文描述: 檢察官辦公室8位CMOS微控制器EEPROM數據存儲器(8位檢察官辦公室的CMOS微控制器)
文件頁數: 47/108頁
文件大?。?/td> 2355K
代理商: PIC16CE624
1998 Microchip Technology Inc.
Preliminary
DS40182A-page 47
PIC16CE62X
9.0
VOLTAGE REFERENCE
MODULE
The Voltage Reference is a 16-tap resistor ladder
network that provides a selectable voltage reference.
The resistor ladder is segmented to provide two ranges
of V
REF
values and has a power-down function to
conserve power when the reference is not being used.
The VRCON register controls the operation of the
reference as shown in Figure 9-1. The block diagram is
given in Figure 9-2.
9.1
Configuring the Voltage Reference
The Voltage Reference can output 16 distinct voltage
levels for each range.
The equations used to calculate the output of the
Voltage Reference are as follows:
if V
RR
= 1: V
REF
= (V
R
<3:0>/24) x V
DD
if V
RR
= 0: V
REF
= (V
DD
x 1/4) + (V
R
<3:0>/32) x V
DD
The setting time of the Voltage Reference must be
considered
when
changing
(Table 13-2). Example 9-1 shows an example of how to
configure the Voltage Reference for an output voltage
of 1.25V with V
DD
= 5.0V.
the
V
REF
output
FIGURE 9-1:
VRCON REGISTER(ADDRESS 9Fh)
FIGURE 9-2:
VOLTAGE REFERENCE BLOCK DIAGRAM
R/W-0
V
REN
bit7
R/W-0
V
ROE
R/W-0
V
RR
U-0
R/W-0
V
R3
R/W-0
V
R2
R/W-0
V
R1
R/W-0
V
R0
R = Readable bit
W =Writable bit
U = Unimplemented bit,
read as ‘0’
- n =Value at POR reset
bit0
bit 7:
V
REN
:
V
REF
Enable
1 = V
REF
circuit powered on
0 = V
REF
circuit powered down, no I
DD
drain
V
ROE
:
V
REF
Output Enable
1 = V
REF
is output on RA2 pin
0 = V
REF
is disconnected from RA2 pin
V
RR
:
V
REF
Range selection
1 = Low Range
0 = High Range
Unimplemented:
Read as '0'
bit 3-0:
V
R
<3:0>
: V
REF
value selection 0
V
R
[3:0]
15
when V
RR
= 1: V
REF
= (V
R
<3:0>/ 24) * V
DD
when V
RR
= 0: V
REF
= 1/4 * V
DD
+ (V
R
<3:0>/ 32) * V
DD
bit 6:
bit 5:
bit 4:
Note:
R is defined in Table 13-3.
V
RR
8R
V
R
3
V
R
0
(From VRCON<3:0>)
16-1 Analog Mux
8R
R
R
R
R
V
REN
V
REF
16 Stages
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PIC16CE624/JW 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16CE624-04/P 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16CE624-04/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16CE624 DIP18
PIC16CE624-04/SO 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16CE624-04/SS 功能描述:8位微控制器 -MCU 1.75KB 96 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT