PIC12C672-04/SM Microchip Technology, PIC12C672-04/SM Datasheet - Page 347
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PIC12C672-04/SM
Manufacturer Part Number
PIC12C672-04/SM
Description
IC MCU OTP 2KX14 A/D 8-SOIJ
Manufacturer
Microchip Technology
Series
PIC® 12Cr
Datasheets
1.PIC16F688T-ISL.pdf
(688 pages)
2.PIC12CE673-10P.pdf
(129 pages)
3.PIC12CE673-10P.pdf
(14 pages)
Specifications of PIC12C672-04/SM
Core Size
8-Bit
Program Memory Size
3.5KB (2K x 14)
Core Processor
PIC
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
5
Program Memory Type
OTP
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 4x8b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
Controller Family/series
PIC12
No. Of I/o's
6
Ram Memory Size
128Byte
Cpu Speed
4MHz
No. Of Timers
1
Digital Ic Case Style
SOIC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
XLT08SO-1 - SOCKET TRANSITION 8SOIC 150/208AC164312 - MODULE SKT FOR PM3 16SOICISPICR1 - ADAPTER IN-CIRCUIT PROGRAMMING309-1048 - ADAPTER 8-SOIC TO 8-DIP309-1047 - ADAPTER 8-SOIC TO 8-DIPAC124001 - MODULE SKT PROMATEII 8DIP/SOIC
Eeprom Size
-
Connectivity
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC12C672-04/SM
Manufacturer:
MIC
Quantity:
141
Part Number:
PIC12C672-04/SM
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
- Current page: 347 of 688
- Download datasheet (3Mb)
18.4.2
1997 Microchip Technology Inc.
RX/DT
USART Asynchronous Receiver
Baud Rate Generator
x64 Baud Rate CLK
SPBRG
Pin Buffer
and Control
The receiver block diagram is shown in
drives the data recovery block. The data recovery block is actually a high speed shifter operating
at x16 times the baud rate, whereas the main receive serial shifter operates at the bit rate or at
F
Once Asynchronous mode is selected, reception is enabled by setting the CREN bit
(RCSTA<4>).
The heart of the receiver is the receive (serial) shift register (RSR). After sampling the RX/TX pin
for the STOP bit, the received data in the RSR is transferred to the RCREG register (if it is empty).
If the transfer is complete, the RCIF flag bit is set. The actual interrupt can be enabled/disabled
by setting/clearing the RCIE enable bit. The RCIF flag bit is a read only bit which is cleared by
the hardware. It is cleared when the RCREG register has been read and is empty. The RCREG
is a double buffered register, i.e. it is a two deep FIFO. It is possible for two bytes of data to be
received and transferred to the RCREG FIFO and a third byte begin shifting to the RSR register.
On the detection of the STOP bit of the third byte, if the RCREG register is still full then overrun
error bit, OERR (RCSTA<1>), will be set. The word in the RSR will be lost. The RCREG register
can be read twice to retrieve the two bytes in the FIFO. The OERR bit has to be cleared in soft-
ware. This is done by resetting the receive logic (the CREN bit is cleared and then set). If the
OERR bit is set, transfers from the RSR register to the RCREG register are inhibited, so it is
essential to clear the OERR bit if it is set. Framing error bit, FERR (RCSTA<2>), is set if a stop
bit is detected as a low level. The FERR bit and the 9th receive bit are buffered the same way as
the receive data. Reading the RCREG will load the RX9D and FERR bits with new values, there-
fore it is essential for the user to read the RCSTA register before reading the next RCREG reg-
ister in order not to lose the old (previous) information in the FERR and RX9D bits.
Figure 18-4:
SPEN
OSC
.
USART Receive Block Diagram
Data
Recovery
Interrupt
CREN
Figure
RCIF
RCIE
RX9
Section 18. USART
18-4. The data is received on the RX/DT pin and
MSb
Stop
RX9D
(8)
OERR
7
RSR register
RCREG register
8
Data Bus
DS31018A-page 18-11
1
FERR
0
Start
LSb
FIFO
18
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