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| CC3220 Datasheet, PDF (40/84 Pages) Texas Instruments – SimpleLink Wi-Fi Wireless and Internet-of-Things Solution, a Single-Chip Wireless MCU | |||
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CC3220
SWAS035A â SEPTEMBER 2016 â REVISED FEBRUARY 2017
www.ti.com
If the TCXO does not have an enable input, an external LDO with an enable function can be used. Using
the LDO improves noise on the TCXO power supply.
Figure 4-12 shows the connection.
CC3220x
TCXO_EN
WLAN_XTAL_P
82 pF
Vcc
XO (40 MHz)
EN
OUT
WLAN_XTAL_N
Copyright © 2017, Texas Instruments Incorporated
Figure 4-12. External TCXO Input
Table 4-8 lists the external Fref clock requirements.
Table 4-8. External Fref Clock Requirements (â40°C to +85°C)
CHARACTERISTICS
TEST CONDITIONS
Frequency
Frequency accuracy (Initial plus temperature plus
aging)
Frequency input duty cycle
Vpp
Clock voltage limits
Sine or clipped sine wave, AC
coupled
@ 1 kHz
Phase noise @ 40 MHz
@ 10 kHz
@ 100 kHz
Input impedance
Resistance
Capacitance
MIN
45%
0.7
12
TYP
40.00
50%
MAX UNIT
MHz
±25 ppm
55%
1.2 Vpp
â125
â138.5 dBc/Hz
â143
kΩ
7 pF
4.14.5 Peripherals
This section describes the peripherals that are supported by the CC3220x device:
⢠SPI
⢠I2S
⢠GPIOs
⢠I2C
⢠IEEE 1149.1 JTAG
⢠ADC
⢠Camera parallel port
⢠UART
⢠SD Host
⢠Timers
40
Specifications
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Product Folder Links: CC3220
Copyright © 2016â2017, Texas Instruments Incorporated
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