MC9S08AC16_08 Datasheet, PDF (161/344 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit (CPU)

Chapter 9 Keyboard Interrupt (S08KBIV1)
9.3.1 KBI Block Diagram
Figure 9-2 shows the block diagram for a KBI module.
KBIP0
KBIPE0
KBIP3
KBIP4
KBIPE3
1
0 _{S KBIPE4}
KBEDG4
KBIPn
1
0 _{S KBIPEn}
V_DD
D ^CLR Q
CK
KBACK
RESET
BUSCLK
KBF
SYNCHRONIZER
KBIMOD
KEYBOARD
INTERRUPT FF
STOP ^{STOP BYPASS}
KBIE
KEYBOARD
INTERRUPT
REQUEST
KBEDGn
Figure 9-2. KBI Block Diagram
9.4 Register Definition
This section provides information about all registers and control bits associated with the KBI module.
Refer to the direct-page register summary in the Memory chapter of this data sheet for the absolute address
assignments for all KBI registers. This section refers to registers and control bits only by their names. A
Freescale-provided equate or header file is used to translate these names into the appropriate absolute
addresses.
MC9S08AC16 Series Data Sheet, Rev. 6
Freescale Semiconductor
161