MC68HC16Z1CPV25 Freescale Semiconductor, MC68HC16Z1CPV25 Datasheet - Page 415

• Manufacturer Part Number: MC68HC16Z1CPV25
• Description: IC MPU 1K RAM 25MHZ 144-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC16r

Specifications of MC68HC16Z1CPV25

• Core Processor: CPU16
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Type: ROMless
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Other names: Q1141110

SCCR1 — SCI Control Register 1
D.6.5 SCI Control Register 1
Bit 15 — Not Implemented
LOOPS — Loop Mode
WOMS — Wired-OR Mode for SCI Pins
M68HC16 Z SERIES
USER’S MANUAL
NOT USED
RESET:
15
Writing a value of zero to SCBR disables the baud rate generator. There are 8191 dif-
ferent bauds available. The baud value depends on the value for SCBR and the sys-
tem clock, as used in the equation above.
a 16.78 MHz system clock. The maximum baud rate with this system clock speed is
524 kbaud.
More accurate baud rates can be obtained by varying the system clock frequency with
the VCO synthesizer. Each VCO speed increment adjusts the baud rate up or down
by 1/64 or 1.56%.
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 disrupts operation.
0 = Normal SCI operation, no looping, feedback path disabled.
1 = Test SCI operation, looping, feedback path enabled.
0 = If configured as an output, TXD is a normal CMOS output.
1 = If configured as an output, TXD is an open-drain output.
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
600.00
300.00
110.00
ILT
64.00
12
0
Table D-32 Examples of SCI Baud Rates
Freescale Semiconductor, Inc.
For More Information On This Product,
PT
11
0
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
REGISTER SUMMARY
Actual
599.87
299.94
110.01
64.00
M
9
0
WAKE
8
0
Percent Error
Table D-32
TIE
–2.48
–0.70
–0.02
–0.02
–0.02
7
0
4.86
0.00
1.14
0.21
0.21
0.01
0.01
TCIE
6
0
shows possible baud rates for
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
3
0
RE
2
0
$YFFC0A
RWU
1
0
D-41
SBK
0
0