mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 430

• Manufacturer Part Number: mc68hc916y3
• Description: Mc68hc16y3 16 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

OR — Overrun Error
NF — Noise Error
FE — Framing Error
PF — Parity Error
D.7.7 SCI Data Register
SCDR — SCI Data Register
D.7.8 Port QS Data Register
PORTQS — Port QS Data Register
D-52
MOTOROLA
RESET:
15
15
SCDR consists of two data registers located at the same address. The receive data
register (RDR) is a read-only register that contains data received by the SCI serial
interface. Data comes into the receive serial shifter and is transferred to RDR. The
transmit data register (TDR) is a write-only register that contains data to be
transmitted. Data is first written to TDR, then transferred to the transmit serial shifter,
where additional format bits are added before transmission. R[7:0]/T[7:0] contain
either the first eight data bits received when SCDR is read, or the first eight data bits
to be transmitted when SCDR is written. R8/T8 are used when the SCI is configured
for nine-bit operation. When the SCI is configured for 8-bit operation, R8/T8 has no
meaning or effect.
PORTQS latches I/O data. Writes drive pins defined as outputs. Reads return data
present on the pins. To avoid driving undefined data, first write a byte to PORTQS,
then configure DDRQS.
0 = Receive data register is empty and can accept data from the receive serial
1 = Receive data register is full and cannot accept data from the receive serial
0 = No noise detected in the received data.
1 = Noise detected in the received data.
0 = No framing error detected in the received data.
1 = Framing error or break detected in the received data.
0 = No parity error detected in the received data.
1 = Parity error detected in the received data.
shifter.
shifter. Any data in the shifter is lost and RDRF remains set.
NOT USED
NOT USED
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
9
8
R8/T8
U
8
RESET:
PQS7
R7/T7
7
0
7
U
R6/T6
PQS6
U
6
6
0
R5/T5
PQS5
U
5
5
0
R4/T4
PQS4
U
4
4
0
R3/T3
PQS3
U
3
3
0
MC68HC16Y3/916Y3
R2/T2
PQS2
USER’S MANUAL
U
2
2
0
$YFFC0E
$YFFC14
R1/T1
PQS1
U
1
1
0
R0/T0
PQS0
0
U
0
0