PIC16C64A-20I/PQ Microchip Technology, PIC16C64A-20I/PQ Datasheet - Page 110

• Manufacturer Part Number: PIC16C64A-20I/PQ
• Description: IC MCU OTP 2KX14 PWM 44-MQFP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C64A-20I/PQ

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: OTP
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-MQFP, 44-PQFP
• Processor Series: PIC16C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 3 bit
• Operating Supply Voltage: 2.5 V to 6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000, DM163022
• Minimum Operating Temperature: - 40 C
• For Use With: 309-1002 - ADAPTER 44-PQFP TO 40-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

PIC16C6X
12.1.1
The data on the RC7/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
FIGURE 12-3: RX PIN SAMPLING SCHEME (BRGH = 0) PIC16C63/R63/65/65A/R65)
FIGURE 12-4: RX PIN SAMPLING SCHEME (BRGH = 1) (PIC16C63/R63/65/65A/R65)
FIGURE 12-5: RX PIN SAMPLING SCHEME (BRGH = 1) (PIC16C63/R63/65/65A/R65)
DS30234D-page 110
RC7/RX/DT pin
Q2, Q4 clk
(RC7/RX/DT pin)
baud clk
x4 clk
SAMPLING
baud CLK
x16 CLK
RC7/RX/DT pin
RX
Q2, Q4 clk
baud clk
x4 clk
1
2
First falling edge after RX pin goes low
3
1
4
1
Start Bit
Samples
First falling edge after RX pin goes low
5
2
6
Second rising edge
3
Samples
7
Samples
4
Start Bit
8
2
1
Samples
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).
Second rising edge
9
Start bit
bit0
10
Baud clk for all but start bit
2
11
3
Baud CLK for all but start bit
12
4
3
13
1
Samples
14
bit1
1997 Microchip Technology Inc.
2
15
16
1
4
2
Bit0
3
bit0