PIC16C765T-I/PT Microchip Technology, PIC16C765T-I/PT Datasheet - Page 82

• Manufacturer Part Number: PIC16C765T-I/PT
• Description: IC MCU OTP 8KX14 USB 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C765T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SCI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 14KB (8K x 14)
• Program Memory Type: OTP
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4.35 V ~ 5.25 V
• Data Converters: A/D 8x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Processor Series: PIC16C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Maximum Clock Frequency: 24 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 3 bit
• Operating Supply Voltage: 4.35 V to 5.25 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
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

PIC16C745/765
Steps to follow when setting up an Asynchronous
Transmission:
1.
2.
3.
FIGURE 11-2: ASYNCHRONOUS MASTER TRANSMISSION
FIGURE 11-3: ASYNCHRONOUS MASTER TRANSMISSION (BACK TO BACK)
TABLE 11-6:
DS41124C-page 82
Address
0Ch
18h
19h
8Ch
98h
99h
Legend: x = unknown, - = unimplemented locations read as '0'. Shaded cells are not used for asynchronous transmission.
Note 1: Bits PSPIE and PSPIF are reserved on the PIC16C745; always maintain these bits clear.
TXIF bit
(interrupt reg. flag)
RC6/TX/CK (pin)
RC6/TX/CK (pin)
Initialize the SPBRG register for the appropriate
baud rate. If a high speed baud rate is desired,
set bit BRGH. (Section 11.1)
Enable the asynchronous serial port by clearing
bit SYNC and setting bit SPEN.
If interrupts are desired, then set enable bit
TXIE.
TRMT bit
(Transmit shift
reg. empty flag)
Write to TXREG
Write to TXREG
TXIF bit
(Transmit buffer
reg. empty flag)
TRMT bit
(Transmit shift
reg. empty flag)
BRG output
(shift clock)
BRG output
(shift clock)
PIR1
RCSTA
TXREG USART Transmit Register
PIE1
TXSTA
SPBRG Baud Rate Generator Register
Name
REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION
Note: This timing diagram shows two consecutive transmissions.
PSPIF
PSPIE
CSRC
SPEN
B
it 7
Transmit Shift Reg.
WORD 1
WORD 1
Transmit Shift Reg
(1)
(1)
Word 1
Word 1
ADIF
ADIE
Bit 6
RX9
TX9
Start Bit
Start Bit
Word 2
SREN
TXEN
RCIF
RCIE
Bit 5
Bit 0
CREN
SYNC
Bit 4
TXIF
TXIE
Bit 0
Preliminary
USBIE CCP1IE TMR2IE
USBIF CCP1IF
Bit 3
—
—
Bit 1
WORD 1
Bit 1
WORD 1
4.
5.
6.
7.
BRGH
FERR
Bit 2
If 9-bit transmission is desired, then set transmit
bit TX9.
Enable the transmission by setting bit TXEN,
which will also set bit TXIF.
If 9-bit transmission is selected, the ninth bit
should be loaded in bit TX9D.
Load data to the TXREG register (starts trans-
mission).
TMR2IF
OERR
TRMT
Bit 1
Bit 7/8
WORD 2
Transmit Shift Reg.
TMR1IE 0000 0000
Bit 7/8
TMR1IF 0000 0000
RX9D
TX9D
Bit 0
Stop Bit
2000 Microchip Technology Inc.
Stop Bit
0000 -00x
0000 0000
0000 -010
0000 0000
Value on:
POR,
BOR
Start Bit
WORD 2
0000 0000
0000 -00x
0000 0000
0000 0000
0000 -010
0000 0000
Value on
all other
Resets
Bit 0