MC68376BGMAB20 Freescale Semiconductor, MC68376BGMAB20 Datasheet - Page 180

• Manufacturer Part Number: MC68376BGMAB20
• Description: IC MCU 32BIT 8K ROM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68376BGMAB20

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Type: ROMless
• Ram Size: 7.5K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 160-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

9.4.3.9 Internal Loop
9.5 QSM Initialization
9-30
MOTOROLA
The LOOPS bit in SCCR1 controls a feedback path in the data serial shifter. When
LOOPS is set, the SCI transmitter output is fed back into the receive serial shifter. TXD
is asserted (idle line). Both transmitter and receiver must be enabled before entering
loop mode.
After reset, the QSM remains in an idle state until initialized. A general guide for
initialization follows.
A. Global
B. Queued Serial Peripheral Interface
C. Serial Communication Interface
1. Configuration QSMCR
2. Configure QIVR and QILR
3. Configure PORTQS and DDRQS
4. Assign pin functions by writing to the pin assignment register PQSPAR
1. Write appropriate values to QSPI command RAM and transmit RAM.
2. Set up the SPCR0
3. Set up SPCR1
4. Set up SPCR2
5. Set up SPCR3
6. To enable the QSPI, set the SPE bit in SPCR1.
1. Set up SCCR0
a.Write an interrupt arbitration priority value into the IARB field.
b. Clear the FREEZE and/or STOP bits for normal operation.
a. Write QSPI/SCI interrupt vector number into QIVR.
b. Write QSPI (ILSPI) and SCI (ILSCI) interrupt priorities into QILR.
a. Write a data word to PORTQS.
b. Set the direction of QSM pins used for I/O by writing to DDRQS.
a. Set the bit in with the BR field.
b. Determine clock phase (CPHA), and clock polarity (CPOL).
c. Determine number of bits to be transferred in a serial operation
d. Select master or slave operating mode (MSTR).
e. Enable or disable wired-OR operation (WOMQ).
a. Establish a delay following serial transfer by writing to the DTL field.
b. Establish a delay before serial transfer by writing to the DSCKL field.
a. Write an initial queue pointer value into the NEWQP field.
b. Write a final queue pointer value into the ENDQP field.
c. Enable or disable queue wrap-around (WREN).
d. Set wrap-around address if enabled (WRTO).
e. Enable or disable QSPI interrupt (SPIFIE).
a. Enable or disable halt at end of queue (HALT).
b. Enable or disable halt and mode fault interrupts (HMIE).
c. Enable or disable loopback (LOOPQ).
a. Set the baud with the SCBR field.
(BITS[3:0]).
QUEUED SERIAL MODULE
USER’S MANUAL
MC68336/376