MC68HC16Z1CFC16 Freescale Semiconductor, MC68HC16Z1CFC16 Datasheet - Page 133

• 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: -

5.4.6 Periodic Interrupt Timer
M68HC16 Z SERIES
USER’S MANUAL
EXTAL
OSCILLATOR
Figure 5-9
riodic interrupt timer.
The periodic interrupt timer (PIT) allows the generation of interrupts of specific priority
at predetermined 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
processing.
CRYSTAL
NOTES:
1. 128 IS PRESENT ONLY ON DEVICES WITH A FAST REFERENCE OSCILLATOR.
XTAL
Figure 5-9 Periodic Interrupt Timer and Software Watchdog Timer
is a block diagram of the watchdog timer and the clock control for the pe-
128
WATCHDOG
SOFTWARE
1
LPSTOP
RESET
Table 5-10 Software Watchdog Divide Ratio
SWT1
SWT0
SWE
FREEZE
4.13 Exceptions
Freescale Semiconductor, Inc.
CLOCK SELECT
AND DISABLE
For More Information On This Product,
SWP
SYSTEM INTEGRATION MODULE
0
0
0
0
1
1
1
1
MODCLK
SOFTWARE WATCHDOG TIMER
(2
Go to: www.freescale.com
15
DIVIDER CHAIN — 4 TAPS)
SWT[1:0]
for further information about interrupt exception
00
01
10
11
00
01
10
11
2
9
PRESCALER
SWSR
Divide Ratio
2
2
2
2
2
2
2
2
11
13
15
18
20
22
24
9
PERIODIC INTERRUPT TIMER
(8-BIT MODULUS COUNTER)
PICR
SELECT
CLOCK
4
PITR
SWP
PTP
PIT WATCHDOG BLOCK 16
INTERRUPT
PIT
5-27