MC68HC16Z1CFC16 Freescale Semiconductor, MC68HC16Z1CFC16 Datasheet - Page 422

• Manufacturer Part Number: MC68HC16Z1CFC16
• Description: IC MPU 1K RAM 16MHZ 132-PQFP
• Manufacturer: Freescale Semiconductor
• Series: HC16r

Specifications of MC68HC16Z1CFC16

• Core Processor: CPU16
• Core Size: 16-Bit
• Speed: 16MHz
• 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: 132-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -

SPBR[7:0] — Serial Clock Baud Rate
D.6.11 QSPI Control Register 1
SPCR1 — QSPI Control Register 1
SPE — QSPI Enable
D-48
RESET:
SPE
15
0
The QSPI uses a modulus counter to derive the SCK baud rate from the MCU system
clock. Baud rate is selected by writing a value from two to 255 into SPBR[7:0]. The
following equation determines the SCK baud rate:
Giving SPBR[7:0] a value of zero or one disables the baud rate generator. SCK is dis-
abled and assumes its inactive state value. No serial transfers occur. At reset, the SCK
baud rate is initialized to one-eighth of the system clock frequency. SPBR has 254 ac-
tive values.
frequency based on a 16.78-MHz system clock.
SPCR1 enables the QSPI and specifies transfer delays. SPCR1 must be written last
during initialization because it contains SPE. Writing a new value to SPCR1 while the
QSPI is enabled disrupts operation.
0 = QSPI is disabled. QSPI pins can be used for general-purpose I/O.
1 = QSPI is enabled. Pins allocated by PQSPAR are controlled by the QSPI.
14
0
13
0
Table D-36
16.78 MHz
12
0
Table D-36 Examples of SCK Frequencies
f
DSCKL[6:0]
sys
Freescale Semiconductor, Inc.
11
For More Information On This Product,
0
SPBR[7:0]
lists several possible baud values and the corresponding SCK
SCK Baud Rate
10
1
Division Ratio
Go to: www.freescale.com
Required
REGISTER SUMMARY
168
510
9
0
16
34
4
8
=
------------------------------------------------------------------------- -
2 SCK Baud Rate Desired
8
0
Value of SPBR
or
7
0
=
255
17
84
------------------------------------ -
2 SPBR[7:0]
2
4
8
6
0
f
sys
f
sys
5
0
Actual SCK
Frequency
4.19 MHz
2.10 MHz
1.05 MHz
493 kHz
100 kHz
33 kHz
4
0
DTL[7:0]
3
0
M68HC16 Z SERIES
USER’S MANUAL
2
1
$YFFC1A
1
0
0
0