PIC16F627A-I/SO Microchip Technology, PIC16F627A-I/SO Datasheet - Page 77

• Manufacturer Part Number: PIC16F627A-I/SO
• Description: IC MCU FLASH 1KX14 EEPROM 18SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F627A-I/SO

• Program Memory Type: FLASH
• Program Memory Size: 1.75KB (1K x 14)
• Package / Case: 18-SOIC (7.5mm Width)
• 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 ~ 85°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: + 85 C
• Mounting Style: SMD/SMT
• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT18SO-1 - SOCKET TRANSITION 18SOIC 300MILI3DBF648 - BOARD DAUGHTER ICEPIC3AC162053 - HEADER INTERFACE ICD,ICD2 18DIPAC164010 - MODULE SKT PROMATEII DIP/SOIC
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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 fall-
ing 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:
 2004 Microchip Technology Inc.
Q2, Q4 CLK
Baud CLK
(RB1/RX/DT pin)
x4 CLK
RX pin
Baud CLK
x16 CLK
RX
Q2, Q4 CLK
RX PIN SAMPLING SCHEME. BRGH = 0
RX PIN SAMPLING SCHEME, BRGH = 1
RX PIN SAMPLING SCHEME, BRGH = 1
Baud CLK
x4 CLK
RX pin
1
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
PIC16F627A/628A/648A
Start Bit
8
2
4
Second rising edge
9
Start bit
1
Samples
10
Baud CLK for all but Start bit
bit 0
2
11
Baud CLK for all but Start bit
12
3
3
13
4
14
1
Samples
bit 1
15
2
16
1
DS40044B-page 75
4
2
bit 0
3
bit 0