MC68332ACFC20 Freescale Semiconductor, MC68332ACFC20 Datasheet - Page 68

• Manufacturer Part Number: MC68332ACFC20
• Description: IC MCU 32BIT 20MHZ 132-PQFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68332ACFC20

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Type: ROMless
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• 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: -
• Data Converters: -

QIVR — QSM Interrupt Vector Register
6.4.2 Pin Control Registers
PORTQS — Port QS Data Register
PQSPAR — PORT QS Pin Assignment Register
DDRQS — PORT QS Data Direction Register
68
MOTOROLA
RESET:
RESET:
15
15
15
0
0
At reset, QIVR is initialized to $0F, which corresponds to the uninitialized interrupt vector in the excep-
tion table. This vector is selected until QIVR is written. A user-defined vector ($40–$FF) should be writ-
ten to QIVR during QSM initialization.
After initialization, QIVR determines which two vectors in the exception vector table are to be used for
QSM interrupts. The QSPI and SCI submodules have separate interrupt vectors adjacent to each other.
Both submodules use the same interrupt vector with the least significant bit (LSB) determined by the
submodule causing the interrupt.
The value of INTV0 used during an interrupt-acknowledge cycle is supplied by the QSM. During an in-
terrupt-acknowledge cycle, INTV[7:1] are driven on DATA[7:1] IMB lines. DATA0 is negated for an SCI
interrupt and asserted for a QSPI interrupt. Writes to INTV0 have no meaning or effect. Reads of INTV0
return a value of one.
The QSM uses nine pins, eight of which form a parallel port (PORTQS) on the MCU. Although these
pins are used by the serial subsystems, any pin can alternately be assigned as general-purpose I/O on
a pin-by-pin basis.
Pins used for general-purpose I/O must not be assigned to the QSPI by register PQSPAR. To avoid
driving incorrect data, the first byte to be output must be written before DDRQS is configured. DDRQS
must then be written to determine the direction of data flow and to output the value contained in register
PORTQS. Subsequent data for output is written to PORTQS.
PORTQS latches I/O data. Writes drive pins defined as outputs. Reads return data present on the pins.
To avoid driving undefined data, first write a byte to PORTQS, then configure DDRQS.
Clearing a bit in the PQSPAR assigns the corresponding pin to general-purpose I/O; setting a bit as-
signs the pin to the QSPI. The PQSPAR does not affect operation of the SCI.
PQSPA6 PQSPA5 PQSPA4 PQSPA3
14
0
13
0
NOT USED
12
0
QILR
Freescale Semiconductor, Inc.
11
For More Information On This Product,
0
10
0
0
Go to: www.freescale.com
PQSPA1 PQSPA0
9
0
8
8
8
0
DDQS7 DDQS6 DDQS5 DDQS4 DDQS3 DDQS2 DDQS1 DDQS0
PQS7
7
0
7
0
7
0
RESET:
PQS6
0
6
0
6
0
PQS5
0
5
0
5
0
PQS4
0
4
0
4
0
INTV
PQS3
1
3
0
3
0
PQS2
1
2
0
2
0
MC68332TS/D
PQS1
1
$YFFC05
$YFFC14
1
0
$YFFC16
$YFFC17
1
0
MC68332
PQS0
0
1
0
0
0
0