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Re: if the I/O pin is NC, is it better to choose 'bidirectio
Dear IanP,
I have asking to NXP and the answer is:
NXP Semiconductors answer:
Greetings,
There is no hard and fast rule on this but in most cases it is better to leave them as inputs. The inputs are Schmidt triggered and have weak...
Re: if the I/O pin is NC, is it better to choose 'bidirectio
Dear IanP,
'One of these pull-ups, called the 'very weak' pull-up, is turned on whenever the port latch for the pin contains a logic 1. This very weak pull-up sources a very small current that will pull the pin high if it is left...
Re: if the I/O pin is NC, is it better to choose 'bidirectio
Dear IanP,
Please help me to decribe why configure these pins as quasi-bidirectional outputs when the I/O is no connect.
Thanks & regards.
Re: if the I/O pin is NC, is it better to choose 'bidirectio
But I have finished to design PCB.
What kind of configurations for the port mode when the I/O is no connect?
1. Bidirectional
2. Push-Pull
3. Input Only (High Impedance)
4. Open Drain
Thanks & regards.
Re: Watchdog was enable but sometime the MCU can stop workin
Thanks Bobi,
I have enable BOR and POR.
How's to check the oscillator also source?
Thanks & regards.
Re: if the I/O pin is NC, is it better to choose 'bidirectio
Thanks for all reply.
I/O port pins on the LPC series can be used both as an input and output.
Please see the port mode circuit below.
How's it can configured just as an output?
When the I/O pin has no connect, which one is better for port output mode as following:
1. Quasi-Bidirectional
2. Push-Pull
3. Input Only (High Impedance)
4. Open Drain
I have read from "P89LPC9221 User's Manual" as following:
Quasi-bidirectional output mode,
'One of these pull-ups, called...
Re: watch dog timer
The watchdog timer feature found on many CPU Supervisors allows the supervisor to monitor
and restart a processor based on its operation. In simplest terms, all the watchdog timer does is
restart a clock each time a transition on its input occurs. If the clock times out...
Dear All,
Please help me for 2 problem as following:
When the LPC922 MCU running, sometime this MCU can stop working.
I have enable internal watchdog timer. Brownout is disable. Reset Pin is disable.
I think when the watchdog is enable, it's impossible the MCU can stop working.
Watchdog timer...
Hi,
I think CC1110 is best solution.
The CC1110 is a low-cost true System-on-Chip (SoC) device designed for low-power and low-voltage wireless communication applications.
The CC1110 combines the excellent performance of the state-of-the-art CC1100 RF transceiver with an industry-standard...
trf-2.4g transceiver
Hi emavil,
This is a good choice: "2.4Ghz. Data Transceiver"
TRF-2.4G High frequency Transceiver module (GFSK) 2.4GHz
TLP2.4G - High Speed Data/Transceiver 2.4Ghz
Specification :
* Frequency : 2.4~2.524 GHz
* Modulation type: GFSK
* Op. Voltage: 3V
* Output Power: +4dBm...
Re: what is Rabitcore
Hi Makri,
The advantages is low cost and high performance (microprocessor 32 bit, 256KB Flash and 128KB RAM).
Rabbit also have the TCP/IP, GPRS, Bluetooth and WiFi interfaces.
Regards,
Ezra
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