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HCS08 Folha de dados(PDF) 129 Page - NXP Semiconductors

Nome de Peças HCS08
Descrição Electrónicos  HCS08 Microcontrollers
PDF  374 Pages
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Fabricante Electrônico  NXP [NXP Semiconductors]
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HCS08 Folha de dados(HTML) 129 Page - NXP Semiconductors

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Keyboard Interrupts (S08KBIV2)
MC9S08JM60 Series Data Sheet, Rev. 5
Freescale Semiconductor
129
9.3.2
KBI Pin Enable Register (KBIPE)
KBIPE contains the pin enable control bits.
9.3.3
KBI Edge Select Register (KBIES)
KBIES contains the edge select control bits.
765
43
210
R
0
0
0
0
KBF
0
KBIE
KBMOD
W
KBACK
Reset:
00
00
000
0
= Unimplemented
Figure 9-3. KBI Status and Control Register
Table 9-2. KBISC Register Field Descriptions
Field
Description
7:4
Unused register bits, always read 0.
3
KBF
Keyboard Interrupt Flag — KBF indicates when a keyboard interrupt is detected. Writes have no effect on KBF.
0 No keyboard interrupt detected.
1 Keyboard interrupt detected.
2
KBACK
Keyboard Acknowledge — Writing a 1 to KBACK is part of the flag clearing mechanism. KBACK always reads
as 0.
1
KBIE
Keyboard Interrupt Enable — KBIE determines whether a keyboard interrupt is requested.
0 Keyboard interrupt request not enabled.
1 Keyboard interrupt request enabled.
0
KBMOD
Keyboard Detection Mode — KBMOD (along with the KBEDG bits) controls the detection mode of the keyboard
interrupt pins.0Keyboard detects edges only.
1 Keyboard detects both edges and levels.
765
43
210
R
KBIPE7
KBIPE6
KBIPE5
KBIPE4
KBIPE3
KBIPE2
KBIPE1
KBIPE0
W
Reset:
00
00
000
0
Figure 9-4. KBI Pin Enable Register
Table 9-3. KBIPE Register Field Descriptions
Field
Description
7:0
KBIPEn
Keyboard Pin Enables — Each of the KBIPEn bits enable the corresponding keyboard interrupt pin.
0 Pin not enabled as keyboard interrupt.
1 Pin enabled as keyboard interrupt.



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