MC1322X Datasheet, PDF (31/54 Pages) Freescale Semiconductor, Inc – Advanced ZigBee™- Compliant Platform-in-Package (PiP) for the 2.4 GHz IEEE® 802.15.4 Standard

Table 2. Pin Function Description (continued)
Pin #
Pin Name
Type
Description¹
Functionality
36 KBI_6
Digital
Keyboard Interface Bit 6 /
Input/Output GPIO28
Asynchronous interrupt input.
37 KBI_5
Digital
Keyboard Interface Bit 5 /
Input/Output GPIO27
Asynchronous interrupt input.
38 KBI_4
Digital
Keyboard Interface Bit 4 /
Input/Output GPIO26
Asynchronous interrupt input.
39 KBI_3
Digital
Keyboard Interface Bit 3 /
Input/Output GPIO25
Used as output for keyboard interface.
40 KBI_2
Digital
Keyboard Interface Bit 2 /
Input/Output GPIO24
Used as output for keyboard interface.
41 KBI_1
Digital
Keyboard Interface Bit 1 /
Input/Output GPIO23
Used as output for keyboard interface.
42 KBI_0_HST_WK Digital
Keyboard Interface Bit 0 / HoST Used as output for keyboard interface /
Input/Output Walk-up output / GPIO22
Alternative function as a wake-up output
(based on a timer) to external device.
43 COIL_BK
Power Switch Buck converter coil drive output Onboard buck converter connection to external
Output
coil, driven by onboard MOSFET.
44 LREG_BK_FB Power Input Voltage input to onboard
regulators, buck regulator
feedback voltage
• When using onboard buck converter,
connect to load side of coil.
• When not using buck converter, connect to
VBATT.
45 VBATT
Power Input
High side supply voltage to buck Connect to battery.
regulator switching MOSFET
and IO buffers
46 RF_PLL_FLT
Analog
Voltage
PLL filter connection
• Connection for PLL filter (Type 2, 2nd Order)
when using primary crystal with frequency
other than 24 MHz (13-26 MHz).
• No Connect for 24 MHz crystal.
47 XTAL_32_IN
Analog Input Optional 32.768 kHz crystal
oscillator input
Connect to 32.768 kHz crystal
48 XTAL_32_OUT Analog Output Optional 32.768 kHz crystal
oscillator output
Connect to 32.768 kHz crystal
49 XTAL_24_OUT Analog Output Primary 24 MHz crystal
oscillator output
• Connect to 13-26 MHz crystal (24 MHz
default).
• No load capacitor required
• Do not load with any capacitance.
50 XTAL_24_IN
Analog Input Primary 24 MHz crystal
oscillator input
• Connect to 13-26 MHz crystal (24 MHz
default).
• No load capacitor required
• Do not load with any capacitance.
51 RESETB
Digital Input System reset input
Active low, asynchronous reset
52 TX_ON
Digital
Control output for external RF Programmable control pin
Input/Output component / GPIO44
MC1322x Technical Data, Rev. 1.3
Freescale Semiconductor
31