MC9S08QD2MPS FREESCALE [Freescale Semiconductor, Inc], MC9S08QD2MPS Datasheet - Page 140
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MC9S08QD2MPS
Manufacturer Part Number
MC9S08QD2MPS
Description
8-Bit HCS08 Central Processor Unit (CPU)
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC9S08QD2MPS.pdf
(202 pages)
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Keyboard Interrupts (S08KBIV2)
10.2
The KBI input pins can be used to detect either falling edges, or both falling edge and low level interrupt
requests. The KBI input pins can also be used to detect either rising edges, or both rising edge and high
level interrupt requests.
The signal properties of KBI are shown in
10.3
The KBI includes three registers:
Refer to the direct-page register summary in the
all KBI registers. This section refers to registers and control bits only by their names.
Some MCUs may have more than one KBI, so register names include placeholder characters to identify
which KBI is being referenced.
10.3.1
KBISC contains the status flag and control bits, which are used to configure the KBI.
140
KBIP0
KBIPn
KBEDG0
KBEDGn
•
•
•
An 8-bit pin status and control register.
An 8-bit pin enable register.
An 8-bit edge select register.
External Signal Description
Register Definition
0
0
1
1
S
S
KBI Status and Control Register (KBISC)
KBIPE0
KBIPEn
Signal
KBIPn
MC9S08QD4 Series MCU Data Sheet, Rev. 3
Figure 10-2. KBI Block Diagram
Keyboard interrupt pins
Table 10-1. Signal Properties
KBMOD
Table
V
DD
Memory
10-1.
D
CK
Function
CLR
Q
chapter for the absolute address assignments for
INTERRUPT FF
KEYBOARD
KBACK
RESET
STOP
I/O
SYNCHRONIZER
STOP BYPASS
I
BUSCLK
KBIE
Freescale Semiconductor
KBF
KBI
INTERRU
PT
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