MC9S08QG8 Datasheet, PDF (176/300 Pages) Freescale Semiconductor, Inc – 8-BIT HCS08 Central Processor Unit

Keyboard Interrupt (S08KBIV2)
KBIP0
1
0 _{S KBIPE0}
KBEDG0
KBIPn
1
0 _{S KBIPEn}
KBEDGn
V_DD
D ^CLR Q
CK
KBACK
RESET
BUSCLK
KBF
SYNCHRONIZER
KBMOD
KEYBOARD
INTERRUPT FF
STOP ^{STOP BYPASS}
KBIE
KBI
INTERRUPT
REQUEST
Figure 12-2. Keyboard Interrupt (KBI) Block Diagram
12.2 External Signal Description
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 Table 12-1.
Table 12-1. Signal Properties
Signal
Function
I/O
KBIPn
Keyboard interrupt pins
I
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 1.01
176
Freescale Semiconductor