EM357-RTR Ember, EM357-RTR Datasheet - Page 132
![IC RF TXRX ZIGBEE 192KB 48QFN](/photos/14/19/141904/636-48-qfn_sml.jpg)
EM357-RTR
Manufacturer Part Number
EM357-RTR
Description
IC RF TXRX ZIGBEE 192KB 48QFN
Manufacturer
Ember
Specifications of EM357-RTR
Frequency
2.4GHz
Data Rate - Maximum
250kbps
Modulation Or Protocol
802.15.4 Zigbee
Applications
General Purpose
Power - Output
5dBm
Sensitivity
-100dBm
Voltage - Supply
2.1 V ~ 3.6 V
Current - Receiving
26mA
Current - Transmitting
31mA
Data Interface
PCB, Surface Mount
Memory Size
192kB Flash, 12kB RAM
Antenna Connector
PCB, Surface Mount
Operating Temperature
-40°C ~ 85°C
Package / Case
48-QFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
636-1011-2
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
EM357-RTR
Manufacturer:
SILICON
Quantity:
3 000
Part Number:
EM357-RTR
Manufacturer:
SILICON
Quantity:
20 000
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In addition, if the TIM_URS bit in the TIMx_CR1 register is set, setting the TIM_UG bit generates a UEV, but
without setting the INT_TIMUIF flag. Thus no interrupt request is sent. This avoids generating both update and
capture interrupt when clearing the counter on the capture event.
When a UEV occurs, the update flag (the INT_TIMUIF bit in the INT_TIMxFLAG register) is set (unless TIM_USR
is 1) and the following registers are updated:
Figure 9-9, Figure 9-10, and Figure 9-11 show some examples of the counter behavior for different clock
frequencies.
The prescaler shadow register is reloaded with the buffer value (contents of the TIMx_PSC register).
The auto-reload active register is updated with the buffer value (contents of the TIMx_ARR register). If the
update source is a counter overflow, the auto-reload is updated before the counter is reloaded, so that the
next period is the expected one. The counter is loaded with the new value.
Figure 9-10. Counter Timing Diagram, Update Event with TIM_ARBE = 1 (counter underflow)
Figure 9-9. Counter Timing Diagram, Internal Clock Divided by 1, TIMx_ARR = 0x6
Final
9-8
120-035X-000G
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