EM357-RTR Ember, EM357-RTR Datasheet - Page 77

• 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

8.2
Configuration
Before using a serial controller, configure and initialize it as follows:
1
SPI - Master
SPI - Slave
TWI - Master
UART
used if RTS/CTS hardware flow control is enabled.
SPI - Master
SPI - Slave
TWI - Master
Set up the parameters specific to the operating mode (master/slave for SPI, baud rate for UART, etc.).
Configure the GPIO pins used by the serial controller as shown in Table 8-1 and Table 8-2. Section 2 in
Chapter 7, GPIO shows how to configure GPIO pins.
If using DMA, set up the DMA and buffers. This is described fully in section 8.7.
If using interrupts, select edge- or level-triggered interrupts with the SCx_INTMODE register, enable
the desired second-level interrupt sources in the INT_SCxCFG register, and finally enable the top-level
SCx interrupt in the NVIC.
Write the serial interface operating mode — SPI, TWI, or UART — to the SCx_MODE register.
Alternate Output
Alternate Output
Alternate Output
Alternate Output
Alternate Output
(open-drain)
(push-pull)
(push-pull)
(push-pull)
SC1MOSI
SC1MISO
SC1SDA
(push-pull)
(not used)
PB1
SC2MOSI
SC2MOSI
TXD
Table 8-1. SC1 GPIO Usage and Configuration
Table 8-2. SC2 GPIO Usage and Configuration
PA0
Input
Final
8-2
Alternate Output
(open-drain)
Alternate Output
Alternate Output
SC1MISO
SC1MOSI
SC1SCL
(open-drain)
Input
Input
Input
PB2
(push-pull)
RXD
SC2MISO
SC2MISO
SC2SDA
PA1
Input
Alternate Output
(push-pull)
(not used)
Alternate Output
Alternate Output
SC1SCLK
SC1SCLK
Input
Input
PB3
nCTS
(open-drain)
(push-pull)
SC2SCLK
SC2SCLK
SC2SCL
Input
PA2
1
EM351 / EM357
Alternate Output (push-
(not used)
(not used)
SC1nSSEL
pull)
Input
(not used)
(not used)
PB4
nRTS
SC2nSSEL
120-035X-000G
Input
PA3
1