MC68332GVEH25 Freescale Semiconductor, MC68332GVEH25 Datasheet - Page 47

IC MCU 32BIT 25MHZ 132-PQFP

MC68332GVEH25

Manufacturer Part Number
MC68332GVEH25
Description
IC MCU 32BIT 25MHZ 132-PQFP
Manufacturer
Freescale Semiconductor
Series
M683xxr
Datasheets

Specifications of MC68332GVEH25

Core Processor
CPU32
Core Size
32-Bit
Speed
25MHz
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 ~ 105°C
Package / Case
132-QFP
Processor Series
M683xx
Core
CPU32
Data Bus Width
32 bit
Controller Family/series
68K
No. Of I/o's
15
Ram Memory Size
2KB
Cpu Speed
25MHz
No. Of Timers
1
Embedded Interface Type
QSPI, SCI, UART
Digital Ic Case Style
PQFP
Rohs Compliant
Yes
Data Ram Size
2 KB
Interface Type
QSPI, SCI, UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
15
Number Of Timers
16
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Request inventory verification / Request inventory verification
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68332GVEH25
Manufacturer:
Freescale Semiconductor
Quantity:
135
Part Number:
MC68332GVEH25
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
4.2.11 Periodic Interrupt Timer
MC68332
USER’S MANUAL
LPSTOP
FREEZE
EXTAL
SWT0
SWT1
SWP
SWE
PTP
The periodic interrupt timer allows the generation of interrupts of specific priority at pre-
determined intervals. This capability is often used to schedule control system tasks
that must be performed within time constraints. The timer consists of a prescaler, a
modulus counter, and registers that determine interrupt timing, priority and vector as-
signment. Refer to SECTION 5 CENTRAL PROCESSING UNIT for further information
about interrupt exception processing.
The periodic interrupt modulus counter is clocked by a signal derived from the buffered
crystal oscillator (EXTAL) input pin unless an external frequency source is used. The
value of the periodic timer prescaler (PTP) bit in the periodic interrupt timer register
(PITR) determines system clock prescaling for the watchdog timer. One of two op-
tions, either no prescaling, or prescaling by a factor of 512, can be selected. The value
of PTP is affected by the state of the MODCLK pin during reset, as shown in Table 4-
5. System software can change PTP value.
Either clock signal (EXTAL or EXTAL
ulus counter (PITCLK). The modulus counter is initialized by writing a value to the pe-
riodic timer modulus (PITM) field in the PITR. A zero value turns off the periodic timer.
When the modulus counter value reaches zero, an interrupt is generated. The modu-
lus counter is then reloaded with the value in PITM and counting repeats. If a new val-
ue is written to PITR, it is loaded into the modulus counter when the current count is
completed.
Figure 4-3 Periodic Interrupt Timer and Software Watchdog Timer
DISABLE
CLOCK
Freescale Semiconductor, Inc.
PRESCALER (2
For More Information On This Product,
SYSTEM INTEGRATION MODULE
0 (External Clock)
Table 4-5 MODCLK Pin and
1 (Internal Clock)
MODCLK
Go to: www.freescale.com
9
)
PTP Bit at Reset
PRECLK
512) is divided by four before driving the mod-
CLOCK
MUX
1 ( 512)
SWCLK
0 ( 1)
4
PTP
PITCLK
2
9
DIVIDER CHAIN (2
8-BIT MODULUS
COUNTER
15 STAGE
2
11
PITR
2
13
15
)
2
15
PIT
INTERRUPT
RESET
PIT BLOCK
4-7

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