PIC16F627A-I/P Microchip Technology Inc., PIC16F627A-I/P Datasheet - Page 75
PIC16F627A-I/P
Manufacturer Part Number
PIC16F627A-I/P
Description
18 PIN, 1.75 KB FLASH, 224 RAM, 16 I/O
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16F627A-IP.pdf
(170 pages)
Specifications of PIC16F627A-I/P
Comparators
2
Cpu Speed
5 MIPS
Eeprom Memory
128 Bytes
Input Output
16
Interface
SCI/USART
Memory Type
Flash
Number Of Bits
8
Package Type
18-pin PDIP
Programmable Memory
1.75K Bytes
Ram Size
224 Bytes
Speed
20 MHz
Timers
2-8-bit, 1-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Available stocks
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Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F627A-I/P
Manufacturer:
ROHM
Quantity:
15 600
Part Number:
PIC16F627A-I/P
Manufacturer:
MICROCHIP原装
Quantity:
20 000
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The data on the RB1/RX/DT pin is sampled three times
by a majority detect circuit to determine if a high or a
low level is present at the RX pin. If bit BRGH
(TXSTA<2>) is clear (i.e., at the low baud rates), the
sampling is done on the seventh, eighth and ninth
falling edges of a x16 clock (Figure 12-3). If bit BRGH
is set (i.e., at the high baud rates), the sampling is done
on the 3 clock edges preceding the second rising edge
after the first falling edge of a x4 clock (Figure 12-4 and
Figure 12-5).
FIGURE 12-1:
FIGURE 12-2:
FIGURE 12-3:
2003 Microchip Technology Inc.
Q2, Q4 CLK
Baud CLK
(RB1/RX/DT pin)
x4 CLK
RX pin
baud CLK
x16 CLK
RX
RX PIN SAMPLING SCHEME. BRGH = 0
RX PIN SAMPLING SCHEME, BRGH = 1
Q2, Q4 clk
RX PIN SAMPLING SCHEME, BRGH = 1
RX pin
baud clk
1
x4 clk
2
First falling edge after RX pin goes low
3
1
4
5
1
START Bit
Samples
First falling edge after RX pin goes low
6
2
Preliminary
Samples
7
Samples
Second rising edge
3
START Bit
8
2
4
Second rising edge
9
START bit
1
Samples
10
Baud CLK for all but START bit
Bit0
2
11
Baud CLK for all but START bit
12
3
3
13
4
14
1
Samples
PIC16F62X
Bit1
15
2
16
1
DS40300C-page 73
4
2
Bit0
3
Bit0
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