SI1014-A-GM Silicon Laboratories Inc, SI1014-A-GM Datasheet - Page 102

• Manufacturer Part Number: SI1014-A-GM
• Description: IC TXRX MCU + EZRADIOPRO
• Manufacturer: Silicon Laboratories Inc

Specifications of SI1014-A-GM

• Package / Case: 42-QFN
• Frequency: 240MHz ~ 960MHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FSK, GFSK, OOK
• Applications: General Purpose
• Power - Output: 13dBm
• Sensitivity: -121dBm
• Voltage - Supply: 0.9 V ~ 3.6 V
• Current - Receiving: 18.5mA
• Current - Transmitting: 30mA
• Data Interface: PCB, Surface Mount
• Memory Size: 16kB Flash, 768B RAM
• Antenna Connector: PCB, Surface Mount
• Number Of Receivers: 1
• Number Of Transmitters: 1
• Wireless Frequency: 240 MHz to 960 MHz
• Interface Type: UART, SMBus, SPI, PCA
• Output Power: 13 dBm
• Operating Supply Voltage: 0.9 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 4 mA
• Minimum Operating Temperature: - 40 C
• Modulation: FSK, GFSK, OOK
• Protocol Supported: C2, SMBus
• Core: 8051
• Program Memory Type: Flash
• Program Memory Size: 16 KB
• Data Ram Size: 768 B
• Supply Current (max): 4 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1869-5

Si1010/1/2/3/4/5
6. Programmable Current Reference (IREF0)
Si1010/1/2/3/4/5 devices include an on-chip programmable current reference (source or sink) with two out-
put current settings: Low Power Mode and High Current Mode. The maximum current output in Low Power
Mode is 63 µA (1 µA steps) and the maximum current output in High Current Mode is 504 µA (8 µA steps).
The current source/sink is controlled though the IREF0CN special function register. It is enabled by setting
the desired output current to a non-zero value. It is disabled by writing 0x00 to IREF0CN. The port I/O pin
associated with ISRC0 should be configured as an analog input and skipped in the Crossbar. See Section
“21. Port Input/Output” on page 219 for more details.
SFR Definition 6.1. IREF0CN: Current Reference Control
SFR Page = 0x0; SFR Address = 0xB9
6.1. PWM Enhanced Mode
On ‘F912 and ‘F902 devices, the precision of the current reference can be increased by fine tuning the
IREF0 output using a PWM signal generated by the PCA. This mode allows the IREF0DAT bits to perform
a course adjustment on the IREF0 output. Any available PCA channel can perform a fine adjustment on
the IREF0 output. When enabled (PWMEN = 1), the CEX signal selected using the PWMSS bit field is
internally routed to IREF0 to control the on time of a current source having the weight of 2 LSBs. With the
two least significant bits of IREF0DAT set to 00b, applying a 100% duty cycle on the CEX signal will be
equivalent to setting the two LSBs of IREF0DAT to 10b. PWM enhanced mode is enabled and setup using
the IREF0CF register.
102
Name
Reset
Type
Bit
5:0
7
6
Bit
IREF0DAT[5:0] IREF0 Data Word.
MDSEL
SINK
R/W
Name
SINK
7
0
MODE
R/W
IREF0 Current Sink Enable.
Selects if IREF0 is a current source or a current sink.
0: IREF0 is a current source.
1: IREF0 is a current sink.
IREF0 Output Mode Select.
Selects Low Power or High Current Mode.
0: Low Power Mode is selected (step size = 1 µA).
1: High Current Mode is selected (step size = 8 µA).
Specifies the number of steps required to achieve the desired output current.
Output current = direction x step size x IREF0DAT.
IREF0 is in a low power state when IREF0DAT is set to 0x00.
6
0
5
0
Rev. 1.0
4
0
Function
3
0
IREF0DAT
R/W
2
0
1
0
0
0