SI1000-C-GM Silicon Laboratories Inc, SI1000-C-GM Datasheet - Page 311
![IC TXRX MCU + EZRADIOPRO](/photos/14/21/142131/42-qfn-series_sml.jpg)
SI1000-C-GM
Manufacturer Part Number
SI1000-C-GM
Description
IC TXRX MCU + EZRADIOPRO
Manufacturer
Silicon Laboratories Inc
Specifications of SI1000-C-GM
Package / Case
42-QFN
Frequency
240MHz ~ 960MHz
Data Rate - Maximum
256kbps
Modulation Or Protocol
FSK, GFSK, OOK
Applications
General Purpose
Power - Output
20dBm
Sensitivity
-121dBm
Voltage - Supply
1.8 V ~ 3.6 V
Current - Receiving
18.5mA
Current - Transmitting
85mA
Data Interface
PCB, Surface Mount
Memory Size
64kB Flash, 4kB 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
20 dBm
Operating Supply Voltage
0.9 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Maximum Supply Current
4.1 mA
Minimum Operating Temperature
- 40 C
Modulation
FSK, GFSK, OOK
Protocol Supported
C2, SMBus
Core
8051
Program Memory Type
Flash
Program Memory Size
64 KB
Data Ram Size
4352 B
Supply Current (max)
4.1 mA
Cpu Family
Si100x
Device Core
8051
Device Core Size
8b
Frequency (max)
25MHz
Total Internal Ram Size
4.25KB
# I/os (max)
22
Number Of Timers - General Purpose
4
Operating Supply Voltage (typ)
2.5/3.3V
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
1.8V
On-chip Adc
18-chx10-bit
Instruction Set Architecture
CISC
Mounting
Surface Mount
Pin Count
42
Package Type
QFN EP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Operating Temperature
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1881-5
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
SI1000-C-GM
Manufacturer:
FSC
Quantity:
1 000
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25.1. Enhanced Baud Rate Generation
The UART0 baud rate is generated by Timer 1 in 8-bit auto-reload mode. The TX clock is generated by
TL1; the RX clock is generated by a copy of TL1 (shown as RX Timer in Figure 25.2), which is not user-
accessible. Both TX and RX Timer overflows are divided by two to generate the TX and RX baud rates.
The RX Timer runs when Timer 1 is enabled, and uses the same reload value (TH1). However, an
RX Timer reload is forced when a START condition is detected on the RX pin. This allows a receive to
begin any time a START is detected, independent of the TX Timer state.
Timer 1 should be configured for Mode 2, 8-bit auto-reload (see Section “27.1.3. Mode 2: 8-bit Coun-
ter/Timer with Auto-Reload” on page 333). The Timer 1 reload value should be set so that overflows will
occur at two times the desired UART baud rate frequency. Note that Timer 1 may be clocked by one of six
sources: SYSCLK, SYSCLK / 4, SYSCLK / 12, SYSCLK / 48, the external oscillator clock / 8, or an exter-
nal input T1. For any given Timer 1 clock source, the UART0 baud rate is determined by Equation 25.1-A
and Equation 25.1-B.
Where T1
value). Timer 1 clock frequency is selected as described in Section “27.1. Timer 0 and Timer 1” on
page 332. A quick reference for typical baud rates and system clock frequencies is given in Table 25.1
through Table 25.2. Note that the internal oscillator may still generate the system clock when the external
oscillator is driving Timer 1.
25.2. Operational Modes
UART0 provides standard asynchronous, full duplex communication. The UART mode (8-bit or 9-bit) is
selected by the S0MODE bit (SCON0.7). Typical UART connection options are shown below.
CLK
is the frequency of the clock supplied to Timer 1, and T1H is the high byte of Timer 1 (reload
Detected
Start
A)
B)
UartBaudRate
T1_Overflow_Rate
Figure 25.2. UART0 Baud Rate Logic
RX Timer
Equation 25.1. UART0 Baud Rate
Timer 1
TH1
TL1
=
Overflow
Overflow
Rev. 1.0
1
-- -
2
=
T1_Overflow_Rate
------------------------- -
256 TH1
T1
–
CLK
2
2
UART
Si1000/1/2/3/4/5
RX Clock
TX Clock
311
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