CC3120MOD Datasheet, PDF (19/52 Pages) Texas Instruments – SimpleLink Wi-Fi CERTIFIED Network Processor Internet-of-Things Module Solution for MCU Applications

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CC3120MOD
SWRS205 – MARCH 2017
5.13 Timing and Switching Characteristics
5.13.1 Device Reset
When a device restart is required, the user may issue a negative pulse on either the nHIB pin (pin 4) or on
the nRESET pin (pin 35), keeping the other pulled high, depending on the configuration of the platform. If
the nRESET pin is used, the user must insure the following:
• A high-to-low reset pulse (on pin 35) of at least 200-ms duration
To ensure a proper reset sequence, the user must call the sl_stop function prior to toggling the reset.
5.13.1.1 nRESET Timing
Figure 5-6 shows the reset timing diagram for the first-time power-up and reset removal.
T1
T2
T3
VBAT
nRESET
nHIB
STATE
POWER
OFF
RESET
HW INIT
FW INIT
Device ready to
serve API calls
32-kHz
XTAL
Figure 5-6. First-Time Power-Up and Reset Removal Timing Diagram
Table 5-2 describes the timing requirements for the first-time power-up and reset removal.
ITEM
T1
T2
T3
Table 5-2. First-Time Power-Up and Reset Removal Timing Requirements
NAME
Supply settling time
Hardware wake-up time
Initialization time
DESCRIPTION
Depends on application board
power supply, decoupling
capacitor, and so on
Internal 32-kHz XTAL settling plus
firmware initialization time plus
radio calibration
MIN
TYP
MAX
3
25
1.35
UNIT
ms
ms
s
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