EM351-RTR Ember, EM351-RTR Datasheet - Page 142

• Manufacturer Part Number: EM351-RTR
• Description: IC RF TXRX ZIGBEE 128KB 48QFN
• Manufacturer: Ember

Specifications of EM351-RTR

• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Power - Output: 3dBm
• Sensitivity: -100dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 26mA
• Current - Transmitting: 31mA
• Data Interface: PCB, Surface Mount
• Memory Size: 128kB 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
• Applications: -
• Other names: 636-1010-2

9.3.9.3
Center-aligned mode is active except when the TIM_CMS bits in the TIMx_CR1 register are 00 (all
configurations where TIM_CMS is non-zero have the same effect on the OCyREF/OCy signals). The compare flag
is set when the counter counts up, when it counts down, or when it counts up and down, depending on the
TIM_CMS bits configuration. The direction bit (TIM_DIR) in the TIMx_CR1 register is updated by hardware and
must not be changed by software. Refer to the Center-Aligned Mode (Up/Down Counting) section for more
information.
Figure 9-23 shows some center-aligned PWM waveforms in an example where:
TIMx_ARR = 8
PWM mode is the PWM mode 1
The output compare flag is set when the counter counts down corresponding to the center-aligned mode 1
selected for TIM_CMS = 01 in the TIMx_CR1 register
PWM Center-Aligned Mode
Figure 9-23. Center-Aligned PWM Waveforms (ARR = 8)
Final
9-18
120-035X-000G