MC908AZ60ACFU Freescale Semiconductor, MC908AZ60ACFU Datasheet - Page 246
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MC908AZ60ACFU
Manufacturer Part Number
MC908AZ60ACFU
Description
IC MCU FLASH 8.4MHZ 60K 64QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908AZ60ACFUER.pdf
(414 pages)
Specifications of MC908AZ60ACFU
Core Processor
HC08
Core Size
8-Bit
Speed
8.4MHz
Connectivity
CAN, SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
52
Program Memory Size
60KB (60K x 8)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 15x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Programmable Interrupt Timer (PIT)
POF — PIT Overflow Flag Bit
POIE — PIT Overflow Interrupt Enable Bit
PSTOP — PIT Stop Bit
PRST — PIT Reset Bit
PPS[2:0] — Prescaler Select Bits
246
This read/write flag is set when the PIT counter reaches the modulo value programmed in the PIT
counter modulo registers. Clear POF by reading the PIT status and control register when POF is set
and then writing a 0 to POF. If another PIT overflow occurs before the clearing sequence is complete,
then writing 0 to POF has no effect. Therefore, a POF interrupt request cannot be lost due to
inadvertent clearing of POF. Reset clears the POF bit. Writing a 1 to POF has no effect.
This read/write bit enables PIT overflow interrupts when the POF bit becomes set. Reset clears the
POIE bit.
This read/write bit stops the PIT counter. Counting resumes when PSTOP is cleared. Reset sets the
PSTOP bit, stopping the PIT counter until software clears the PSTOP bit.
Setting this write-only bit resets the PIT counter and the PIT prescaler. Setting PRST has no effect on
any other registers. Counting resumes from $0000. PRST is cleared automatically after the PIT
counter is reset and always reads as logic zero. Reset clears the PRST bit.
These read/write bits select one of the seven prescaler outputs as the input to the PIT counter as
21-2
1 = PIT counter has reached modulo value
0 = PIT counter has not reached modulo value
1 = PIT overflow interrupts enabled
0 = PIT overflow interrupts disabled
1 = PIT counter stopped
0 = PIT counter active
1 = Prescaler and PIT counter cleared
0 = No effect
shows. Reset clears the PPS[2:0] bits.
Address:
Do not set the PSTOP bit before entering wait mode if the PIT is required
to exit wait mode.
Setting the PSTOP and PRST bits simultaneously stops the PIT counter at
a value of $0000.
Reset:
Read:
Write:
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
$004B
POF
Bit 7
0
0
Figure 21-3. PIT Status and Control Register (PSC)
= Unimplemented
POIE
6
0
PSTOP
5
1
NOTE
NOTE
PRST
4
0
0
3
0
0
PPS2
2
0
PPS1
1
0
Freescale Semiconductor
PPS0
Bit 0
0
Table
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