MC68HC908QT2CPE Freescale, MC68HC908QT2CPE Datasheet - Page 52
MC68HC908QT2CPE
Manufacturer Part Number
MC68HC908QT2CPE
Description
Manufacturer
Freescale
Datasheet
1.MC68HC908QT2CPE.pdf
(184 pages)
Specifications of MC68HC908QT2CPE
Cpu Family
HC08
Device Core Size
8b
Frequency (max)
8MHz
Total Internal Ram Size
128Byte
# I/os (max)
6
Number Of Timers - General Purpose
2
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
On-chip Adc
4-chx8-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Through Hole
Pin Count
8
Package Type
PDIP
Program Memory Type
Flash
Program Memory Size
1.5KB
Lead Free Status / RoHS Status
Compliant
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Auto Wakeup Module (AWU)
Bits 7–4 — Not used
KEYF — Keyboard Flag Bit
ACKK — Keyboard Acknowledge Bit
IMASKK— Keyboard Interrupt Mask Bit
4.6.3 Keyboard Interrupt Enable Register
The keyboard interrupt enable register (KBIER) enables or disables the auto wakeup to operate as a
keyboard/auto wakeup interrupt input.
AWUIE — Auto Wakeup Interrupt Enable Bit
52
These read-only bits always read as 0s.
This read-only bit is set when a keyboard interrupt is pending on port A or auto wakeup. Reset clears
the KEYF bit.
Writing a 1 to this write-only bit clears the keyboard/auto wakeup interrupt request on port A and auto
wakeup logic. ACKK always reads as 0.Reset clears ACKK.
Writing a 1 to this read/write bit prevents the output of the keyboard interrupt mask from generating
interrupt requests on port A or auto wakeup. Reset clears the IMASKK bit.
This read/write bit enables the auto wakeup interrupt input to latch interrupt requests. Reset clears
AWUIE.
1 = Keyboard/auto wakeup interrupt pending
0 = No keyboard/auto wakeup interrupt pending
1 = Keyboard/auto wakeup interrupt requests masked
0 = Keyboard/auto wakeup interrupt requests not masked
1 = Auto wakeup enabled as interrupt input
0 = Auto wakeup not enabled as interrupt input
Address: $001B
MODEK is not used in conjuction with the auto wakeup feature. To see a
description of this bit, see
KBIE5–KBIE0 bits are not used in conjuction with the auto wakeup feature.
To see a description of these bits, see
Register.
Reset:
Read:
Write:
Figure 4-4. Keyboard Interrupt Enable Register (KBIER)
Bit 7
0
0
= Unimplemented
AWUIE
MC68HC908QY/QT Family Data Sheet, Rev. 6
6
0
KBIE5
9.7.1 Keyboard Status and Control
5
0
NOTE
NOTE
KBIE4
4
0
9.7.2 Keyboard Interrupt Enable
KBIE3
3
0
KBIE2
2
0
Register.
KBIE1
1
0
Freescale Semiconductor
KBIE0
Bit 0
0
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