mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 446

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

D.8.10 SCI Control Register 1
SCCR1A — SCIA Control Register 1
SCCR1B — SCIB Control Register 1
D-68
MOTOROLA
RESET:
USED
NOT
15
where SCBR[12:0] is in the range of 1 to 8191. Writing a value of zero to SCBR dis-
ables the baud rate generator. There are 8191 different bauds available. The baud val-
ue depends on the value for SCBR and the system clock, as used in the equation
above. Table D-44 shows possible baud rates for a 16.78 MHz system clock. The
maximum baud rate with this system clock speed is 524 kbaud.
SCCR1 contains SCI configuration parameters, including transmitter and receiver en-
able bits, interrupt enable bits, and operating mode enable bits. SCCR0 can be read
or written at any time. The SCI can modify the RWU bit under certain circumstances.
Changing the value of SCCR1 bits during a transfer operation can disrupt the transfer.
LOOPS
14
0
WOMS
13
0
Baud Rate
500,00.00
38,400.00
32,768.00
19,200.00
Nominal
9,600.00
4,800.00
2,400.00
1,200.00
ILT
12
600.00
300.00
110.00
0
64.00
Table D-44 Examples of SCI Baud Rates
Freescale Semiconductor, Inc.
For More Information On This Product,
SCBR[12:0]
PT
11
0
SCI Baud Rate
PE
10
0
Go to: www.freescale.com
Baud Rate
524,288.00
37,449.14
32,768.00
19,418.07
9,532.51
4,809.98
2,404.99
1,199.74
Actual
599.87
299.94
110.01
64.00
M
9
0
=
-------------------------------------------------------------------------- -
32 SCI Baud Rate Desired
WAKE
8
0
Percent Error
=
or
TIE
------------------------------------------- -
32 SCBR[12:0]
7
0
–2.48
–0.70
–0.02
–0.02
–0.02
4.86
0.00
1.14
0.21
0.21
0.01
0.01
TCIE
f
6
0
sys
f
sys
Value of SCBR
RIE
5
0
1,748
4,766
8,191
109
218
437
874
14
16
27
55
1
ILIE
4
0
TE
MC68HC16Y3/916Y3
3
0
USER’S MANUAL
RE
2
0
$YFFC1A
$YFFC2A
RWU
1
0
SBK
0
0