PIC16F628A-E/P Microchip Technology, PIC16F628A-E/P Datasheet - Page 69
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PIC16F628A-E/P
Manufacturer Part Number
PIC16F628A-E/P
Description
IC MCU FLASH 2KX14 EEPROM 18DIP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F627A-IP.pdf
(180 pages)
2.PIC16F627A-IP.pdf
(22 pages)
3.PIC16F627A-ISO.pdf
(168 pages)
Specifications of PIC16F628A-E/P
Program Memory Type
FLASH
Program Memory Size
3.5KB (2K x 14)
Package / Case
18-DIP (0.300", 7.62mm)
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
16
Eeprom Size
128 x 8
Ram Size
224 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
224 B
Interface Type
SCI/USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
16
Number Of Timers
3
Operating Supply Voltage
2 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
Through Hole
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
Minimum Operating Temperature
- 40 C
Data Rom Size
128 B
Height
3.3 mm
Length
22.86 mm
Supply Voltage (max)
5.5 V
Supply Voltage (min)
3 V
Width
6.35 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
I3DBF648 - BOARD DAUGHTER ICEPIC3AC162053 - HEADER INTERFACE ICD,ICD2 18DIPACICE0202 - ADAPTER MPLABICE 18P 300 MIL
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
11.0
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
conserve power when the reference is not being used.
The VRCON register controls the operation of the
reference as shown in Figure 11-1. The block diagram
is given in Figure 11-1.
11.1
The Voltage Reference can output 16 distinct voltage
levels for each range.
REGISTER 11-1:
FIGURE 11-1:
2004 Microchip Technology Inc.
REF
V
REN
Note:
VOLTAGE REFERENCE
MODULE
Voltage Reference Configuration
values and has a power-down function to
bit 7
bit 6
bit 5
bit 4
bit 3-0
R is defined in Table 17-3.
V
REF
VRCON REGISTER (ADDRESS: 9Fh)
VOLTAGE REFERENCE BLOCK DIAGRAM
bit 7
V
1 = V
0 = V
V
1 = V
0 = V
V
1 = Low Range
0 = High Range
Unimplemented: Read as ‘0’
V
When V
When V
Legend:
R = Readable bit
-n = Value at POR
REN
ROE
RR
R
V
R/W-0
V
<3:0>: V
DD
REN
: V
: V
REF
REF
: V
REF
REF
REF
RR
RR
REF
REF
8R
circuit powered on
circuit powered down, no I
is output on RA2 pin
is disconnected from RA2 pin
Range selection
= 1: V
= 0: V
REF
Enable
Output Enable
R/W-0
V
value selection 0
ROE
REF
REF
R
= (V
= 1/4 * V
R/W-0
R
V
<3:0>/ 24) * V
R
Preliminary
RR
W = Writable bit
‘1’ = Bit is set
DD
16 Stages
PIC16F627A/628A/648A
16-1 Analog Mux
+ (V
V
DD
R
R
U-0
[3:0]
<3:0>/ 32) * V
—
drain
The equations used to calculate the output of the
Voltage Reference are as follows:
The setting time of the Voltage Reference must be
considered when changing the V
(Table 17-3). Example 11-1 demonstrates how Voltage
Reference is configured for an output voltage of 1.25V
with V
DD
R
if V
if V
15
DD
RR
RR
V
= 5.0V.
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
= 1:
= 0:
REF
V
DD
R
R
3
V
=
REF
V
DD
V
=
SS
R/W-0
V
--------------------- -
8R
V
R
1
-- -
4
R
<3:0>
24
2
V
V
+
R
R
3
0
V
--------------------- -
(From VRCON<3:0>)
R
V
x = Bit is unknown
REF
<3:0>
32
SS
R/W-0
V
V
DD
DS40044B-page 67
output
R
1
V
RR
V
DD
R/W-0
V
R
0
bit 0