PIC16F874-20/L Microchip Technology, PIC16F874-20/L Datasheet - Page 356

• Manufacturer Part Number: PIC16F874-20/L
• Description: IC MCU FLASH 4KX14 EE 44PLCC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F874-20/L

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Controller Family/series: PIC16F
• No. Of I/o's: 33
• Eeprom Memory Size: 128Byte
• Ram Memory Size: 192Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 192 B
• Interface Type: MSSP, PSP, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 70 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, DM163022, DV164120
• Minimum Operating Temperature: 0 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164309 - MODULE SKT FOR PM3 44PLCC444-1001 - DEMO BOARD FOR PICMICRO MCUDVA16XL441 - ADAPTER DEVICE ICE 44PLCC309-1040 - ADAPTER 44-PLCC ZIF TO 40-DIP309-1039 - ADAPTER 44-PLCC TO 40-DIPDV007003 - PROGRAMMER UNIVERSAL PROMATE II
• Lead Free Status / Rohs Status: Details

PICmicro MID-RANGE MCU FAMILY
18.6.2
DS31018A-page 18-20
PIR
RCSTA
RCREG
PIE
TXSTA
SPBRG Baud Rate Generator Register
Legend: x = unknown, - = unimplemented read as '0'.
Note 1: The position of this bit is device dependent.
Name
Shaded cells are not used for Synchronous Slave Reception.
USART Synchronous Slave Reception
CSRC
SPEN
Bit 7
RX7
The operation of the synchronous master and slave modes is identical except in the case of the
SLEEP mode. Also, bit SREN is a don't care in slave mode.
If receive is enabled, by setting the CREN bit, prior to the SLEEP instruction, then a word may be
received during SLEEP. On completely receiving the word, the RSR register will transfer the data
to the RCREG register and if the RCIE enable bit bit is set, the interrupt generated will wake the
chip from SLEEP. If the global interrupt is enabled, the program will branch to the interrupt vector
(0004h).
Steps to follow when setting up a Synchronous Slave Reception:
1.
2.
3.
4.
5.
6.
7.
8.
Table 18-11: Registers Associated with Synchronous Slave Reception
Bit 6
RX9
RX6
TX9
Enable the synchronous master serial port by setting the SYNC and SPEN bits and clear-
ing the CSRC bit.
If interrupts are desired, then set the RCIE enable bit.
If 9-bit reception is desired, then set the RX9 bit.
To enable reception, set the CREN enable bit.
The RCIF bit will be set when reception is complete and an interrupt will be generated, if
the RCIE bit was set.
Read the RCSTA register to get the ninth bit (if enabled) and determine if any error
occurred during reception.
Read the 8-bit received data by reading the RCREG register.
If any error occurred, clear the error by clearing the CREN bit.
SREN CREN
TXEN SYNC
Bit 5
RX5
Bit 4
RX4
RCIF
RCIE
Bit 3
RX3
—
—
(1)
(1)
BRGH
FERR
Bit 2
RX2
OERR
TRMT
Bit 1
RX1
RX9D
TX9D
Bit 0
RX0
0000 -00x
0000 0000
0000 -010
0000 0000
Value on:
1997 Microchip Technology Inc.
POR,
BOR
0
0
other Resets
Value on all
0000 -00x
0000 0000
0000 -010
0000 0000
0
0