CR16MCS9VJE8 National Semiconductor, CR16MCS9VJE8 Datasheet - Page 44

• Manufacturer Part Number: CR16MCS9VJE8
• Description: 16-Bit Microcontroller IC
• Manufacturer: National Semiconductor

Specifications of CR16MCS9VJE8

• Controller Family/series: CR16X
• Core Size: 16 Bit
• Program Memory Size: 64K X 8 Flash
• Digital Ic Case Style: PQFP
• No. Of Pins: 80
• Mounting Type: Surface Mount
• Clock Frequency: 25MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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register and do a logical OR with the register value. Instead,
just write the mask directly to the register address.
The register format is shown below.
13.7
To set up and use the Multi-Input Wake-Up function, use the
following procedure. Performing the steps in the order shown
will prevent false triggering of a wake-up condition. This
same procedure should be used following a reset because
the wake-up inputs are left floating, resulting in unknown data
on the input pins.
To change the edge sensitivity of a wake-up channel, use the
following procedure. Performing the steps in the order shown
will prevent false triggering of a wake-up/interrupt condition.
1. Clear the WKENA register to disable the wake-up chan-
2. If the input originates from an I/O port (the usual case),
3. Write the WKEDG register to select the desired type of
4. Set all bits in the WKPCL register to clear any pending
5. Set up the WKICTL1 and WKICTL2 registers to define
6. Set the bits in the WKENA register corresponding to the
1. Clear the WKENA bit associated with the input to be re-
2. Write the new value to the corresponding bit position in
3. Set the corresponding bit in the WKPCL register to clear
4. Set the same WKENA bit to re-enable the wake-up func-
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nels.
set the corresponding bit in the port direction register to
configure the I/O pin to operate as an input.
edge sensitivity (clear to 0 for rising edge, set to 1 for fall-
ing edge).
bits in the WKPND register.
the interrupt request signal used for each channel.
wake-up channels to be activated.
programmed.
the WKEDG register to reprogram the edge sensitivity of
the input.
the pending bit in the WKPND register.
tion.
PROGRAMMING PROCEDURES
WKCL15-WKCL0
0
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