MC68HC908QY1MDW Freescale Semiconductor, MC68HC908QY1MDW Datasheet - Page 51

• Manufacturer Part Number: MC68HC908QY1MDW
• Description: 8-bit Microcontrollers - MCU 8 Bit 8MHz
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC908QY1MDW

• Product Category: 8-bit Microcontrollers - MCU
• Rohs: yes
• Core: HC08
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Program Memory Size: 1.5 KB
• Data Ram Size: 128 B
• On-chip Adc: No
• Operating Supply Voltage: 3.3 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: SOIC-16
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 13
• Number Of Timers: 2
• Program Memory Type: Flash
• Factory Pack Quantity: 47
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 2.7 V

4.6 Input/Output Registers
The AWU shares registers with the keyboard interrupt (KBI) module and the port A I/O module. The
following I/O registers control and monitor operation of the AWU:
4.6.1 Port A I/O Register
The port A data register (PTA) contains a data latch for the state of the AWU interrupt request, in addition
to the data latches for port A.
AWUL — Auto Wakeup Latch
4.6.2 Keyboard Status and Control Register
The keyboard status and control register (KBSCR):
Freescale Semiconductor
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This is a read-only bit which has the value of the auto wakeup interrupt request latch. The wakeup
request signal is generated internally. There is no PTA6 port or any of the associated bits such as
PTA6 data direction or pullup bits.
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1 = Auto wakeup interrupt request is pending
0 = Auto wakeup interrupt request is not pending
Port A data register (PTA)
Keyboard interrupt status and control register (KBSCR)
Keyboard interrupt enable register (KBIER)
Flags keyboard/auto wakeup interrupt requests
Acknowledges keyboard/auto wakeup interrupt requests
Masks keyboard/auto wakeup interrupt requests
Address: $0000
Address: $001A
PTA5–PTA0 bits are not used in conjuction with the auto wakeup feature.
To see a description of these bits, see
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 4-3. Keyboard Status and Control Register (KBSCR)
Bit 7
Bit 7
0
0
0
0
= Unimplemented
= Unimplemented
Figure 4-2. Port A Data Register (PTA)
AWUL
MC68HC908QY/QT Family Data Sheet, Rev. 6
6
0
6
0
0
PTA5
5
5
0
0
NOTE
PTA4
4
4
0
0
12.2.1 Port A Data
Unaffected by reset
KEYF
PTA3
3
3
0
ACKK
PTA2
2
2
0
0
Register.
IMASKK
PTA1
1
1
0
Input/Output Registers
MODEK
PTA0
Bit 0
Bit 0
0
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