1321XEVK Freescale Semiconductor, 1321XEVK Datasheet - Page 35

• Manufacturer Part Number: 1321XEVK
• Description: KIT EVALUATION FOR 1321X
• Manufacturer: Freescale Semiconductor
• Type: Zigbeer

Specifications of 1321XEVK

• Frequency: 2.4GHz
• Wireless Frequency: 2.4 GHz
• Modulation: DSSS OQPSK
• Security: 128 bit AES
• Operating Voltage: 2 VDC to 3.4 VDC
• Operating Temperature Range: - 40 C to + 85 C
• For Use With/related Products: MC1321x
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

5.7.2
The HCS08 has one KBI module with eight keyboard interrupt inputs that share port A pins.
The KBI module allows up to eight pins to act as additional interrupt sources. Four of these pins allow
falling-edge sensing while the other four can be configured for either rising-edge sensing or falling-edge
sensing. The sensing mode for all eight pins can also be modified to detect edges and levels instead of only
edges.
This on-chip peripheral module is called a keyboard interrupt (KBI) module because originally it was
designed to simplify the connection and use of row-column matrices of keyboard switches. However, these
inputs are also useful as extra external interrupt inputs and as an external means of waking up the MCU
from stop or wait low-power modes.
5.7.3
The keyboard interrupt (KBI) module features include:
5.7.3.1
Figure 20
Freescale Semiconductor
KBIP0
KBIP3
KBIP4
KBIPn
KBEDG4
KBEDGn
•
Keyboard interrupts selectable on eight port pins:
— Four falling-edge/low-level sensitive
— Four falling-edge/low-level or rising-edge/high-level sensitive
— Choice of edge-only or edge-and-level sensitivity
— Common interrupt flag and interrupt enable control
— Capable of waking up the MCU from stop3 or wait mode
shows the block diagram for the KBI module.
0
1
0
1
Keyboard Interrupt (KBI) Module
KBI Features
S
S
KBI Block Diagram
KBIPE0
KBIPE3
KBIPE4
KBIPEn
MC13211/212/213 Technical Data, Rev. 1.8
Figure 20. KBI Block Diagram
KBIMOD
VDD
D
CK
CLR
Q
INTERRUPT FF
KEYBOARD
KBACK
RESET
STOP
SYNCHRONIZER
STOP BYPASS
BUSCLK
KBIE
KBF
KEYBOARD
INTERRUPT
REQUEST
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