S3S12HZ256J3CAA FREESCALE [Freescale Semiconductor, Inc], S3S12HZ256J3CAA Datasheet - Page 402
S3S12HZ256J3CAA
Manufacturer Part Number
S3S12HZ256J3CAA
Description
HCS12 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.S3S12HZ256J3CAA.pdf
(692 pages)
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Chapter 13 Serial Communication Interface (SCIV4)
Each data character is contained in a frame that includes a start bit, eight or nine data bits, and a stop bit.
Clearing the M bit in SCI control register 1 configures the SCI for 8-bit data characters. A frame with eight
data bits has a total of 10 bits. Setting the M bit configures the SCI for nine-bit data characters. A frame
with nine data bits has a total of 11 bits
When the SCI is configured for 9-bit data characters, the ninth data bit is the T8 bit in SCI data register
high (SCIDRH). It remains unchanged after transmission and can be used repeatedly without rewriting it.
A frame with nine data bits has a total of 11 bits.
402
START
START
BIT
BIT
BIT 0
BIT 0
BIT 1
BIT 1
BIT 2
BIT 2
1
1
Start
Start
The address bit identifies the frame as an address
character. See
The address bit identifies the frame as an address
character. See
Bit
Bit
1
1
1
1
1
1
Table 13-12. Example of 9-Bit Data Formats
Table 13-11. Example of 8-bit Data Formats
BIT 3
BIT 3
(BIT M IN SCICR1 CLEAR)
MC9S12HZ256 Data Sheet, Rev. 2.04
(BIT M IN SCICR1 SET)
Figure 13-12. SCI Data Formats
8-BIT DATA FORMAT
9-BIT DATA FORMAT
Data
Data
Bits
Bits
8
7
7
9
8
8
BIT 4
BIT 4
Section 13.4.5.6, “Receiver
Section 13.4.5.6, “Receiver
Address
Address
BIT 5
BIT 5
Bits
Bits
1
1
0
0
0
0
1
1
BIT 6
BIT 6
Parity
Parity
POSSIBLE
Bits
Bits
PARITY
BIT 7
BIT 7
0
1
0
0
1
0
BIT
Wakeup”.
Wakeup”.
POSSIBLE
PARITY
STOP
BIT 8
BIT
BIT
Stop
Stop
Bit
Bit
1
1
1
1
1
1
START
NEXT
STOP
BIT
BIT
START
NEXT
BIT
Freescale Semiconductor
STANDARD
STANDARD
SCI DATA
INFRARED
SCI DATA
INFRARED
SCI DATA
SCI DATA
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