MC9S08SH16CTL Freescale, MC9S08SH16CTL Datasheet - Page 79
MC9S08SH16CTL
Manufacturer Part Number
MC9S08SH16CTL
Description
Manufacturer
Freescale
Datasheet
1.MC9S08SH16CTL.pdf
(328 pages)
Specifications of MC9S08SH16CTL
Cpu Family
HCS08
Device Core Size
8b
Frequency (max)
40MHz
Interface Type
SCI/SPI
Total Internal Ram Size
1KB
# I/os (max)
23
Number Of Timers - General Purpose
3
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
On-chip Adc
16-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
28
Package Type
TSSOP
Program Memory Type
Flash
Program Memory Size
16KB
Lead Free Status / RoHS Status
Compliant
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Part Number
Manufacturer
Quantity
Price
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Part Number:
MC9S08SH16CTL
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6.4.2
A valid edge or level on an enabled pin interrupt sets PTxIF in PTxSC. If PTxIE in PTxSC is set, an
interrupt request is presented to the CPU. To clear PTxIF, write a 1 to PTxACK in PTxSC provided all
enabled pin interrupt inputs are at their de-asserted levels. PTxIF remains set if any enabled pin interrupt
is asserted while attempting to clear by writing a 1 to PTxACK.
6.4.3
The pin interrupts can be configured to use an internal pull-up/pull-down resistor using the associated I/O
port pull-up enable register. If an internal resistor is enabled, the PTxES register is used to select whether
the resistor is a pull-up (PTxESn = 0) or a pull-down (PTxESn = 1).
6.4.4
When a pin interrupt is first enabled, it is possible to get a false interrupt flag. To prevent a false interrupt
request during pin interrupt initialization, the user should do the following:
6.5
Pin behavior following execution of a STOP instruction depends on the stop mode that is entered. An
explanation of pin behavior for the various stop modes follows:
Freescale Semiconductor
1. Mask interrupts by clearing PTxIE in PTxSC.
2. Select the pin polarity by setting the appropriate PTxESn bits in PTxES.
3. If using internal pull-up/pull-down device, configure the associated pull enable bits in PTxPE.
4. Enable the interrupt pins by setting the appropriate PTxPSn bits in PTxPS.
5. Write to PTxACK in PTxSC to clear any false interrupts.
6. Set PTxIE in PTxSC to enable interrupts.
•
•
Stop2 mode is a partial power-down mode, whereby I/O latches are maintained in their state as
before the STOP instruction was executed. CPU register status and the state of I/O registers should
be saved in RAM before the STOP instruction is executed to place the MCU in stop2 mode. Upon
recovery from stop2 mode, before accessing any I/O, the user should examine the state of the PPDF
bit in the SPMSC2 register. If the PPDF bit is 0, I/O must be initialized as if a power on reset had
occurred. If the PPDF bit is 1, I/O data previously stored in RAM, before the STOP instruction was
executed, peripherals may require being initialized and restored to their pre-stop condition. The
user must then write a 1 to the PPDACK bit in the SPMSC2 register. Access to I/O is now permitted
again in the user application program.
In stop3 mode, all I/O is maintained because internal logic circuity stays powered up. Upon
recovery, normal I/O function is available to the user.
Pin Behavior in Stop Modes
Edge and Level Sensitivity
Pull-up/Pull-down Resistors
Pin Interrupt Initialization
MC9S08SH32 Series Data Sheet, Rev. 2
PRELIMINARY
Chapter 6 Parallel Input/Output Control
79
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