IA186EM-PQF100I-R INNOVASIC [InnovASIC, Inc], IA186EM-PQF100I-R Datasheet - Page 24
IA186EM-PQF100I-R
Manufacturer Part Number
IA186EM-PQF100I-R
Description
8/16-Bit Microcontrollers
Manufacturer
INNOVASIC [InnovASIC, Inc]
Datasheet
1.IA186EM-PQF100I-R.pdf
(133 pages)
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IA186EM/IA188EM
8/16-BIT Microcontrollers
SPCT (080h) - Serial Port ConTrol Register.
This register controls both transmit and receive parts of the serial port.
The value of the SPCT register is 0000h at reset.
15 14 13 12
Reserved (bits 15-7) – Reserved – Set to 0.
TEMT (bit 6) – Transmitter Empty. When both the transmit shift register and the transmit register are
empty, this bit is set indicating to software that it is safe to disable the transmitter.
This bit is read-only.
THRE (bit 5) – Transmit Holding Register Empty. When this bit is 1, the corresponding transmit
holding register is ready to accept data. This is a read-only bit.
RDR (bit 4) – Receive Data Ready. When this bit is 1, the respective SPRD register contains valid
data. This is a read/write bit and can be reset only by reading the corresponding Receive register.
BRKI (bit 3) –Break Interrupt. This bit indicates that a break has been received when this bit is set to
1 and causes a serial port interrupt request.
NOTE: This bit should be reset by software.
FER (bit 2) – Framing Error Detected. When the receiver samples the rxd line as low when a stop bit
is expected (line high) a framing error is generated setting this bit.
NOTE: This bit should be reset by software.
PER (bit 1) - Parity Error Detected. When a parity error is detected in either mode 1 or 3, this bit is
set.
NOTE: This bit should be reset by software.
OER (bit 0) – Overrun Error Detected. When new data overwrites valid data in the receive register
(because it hasn’t been read) an overrun error is detected setting this bit.
NOTE: This bit should be reset by software.
Reserved (bits 15-12) – Reserved. Set to 0.
TXIE (bit 11) – Transmitter Ready Interrupt Enable. This bit enables the generation of an interrupt
requests whenever the transmit holding register is empty (THRE bit 1). The respective port does not
generate interrupts when this bit is 0. Interrupts continue to be generated as long as THRE and the
TXIE are 1.
Reserved
3737 Princeton NE, Ste 130 • Albuquerque, NM 87107 • Tel 505.883.5263 • Fax 505.883.5477 • www.Innovasic.com
11
TX
IE
RX
10
IE
LOOP
9
BRK
8
BRK
VAL
7
PMODE
6
As of Production Version -03
5
WLGN
4
STP
3
TMODE
2
Data Sheet
RSIE
1
RMODE
0
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