AMIS-53000 Datasheet, PDF (35/99 Pages) AMI SEMICONDUCTOR – Frequency Agile Transceiver

AMIS-53000 Frequency Agile Transceiver
Data Sheet
6.1.4.5. Interface Options
Table 16: I²C Address Auto Increment
Register
Number (HEX) Name
0X0C
General Options A
0X0D
General Options B
Function
Bits
3
Disable the internal pull up resistors on SDATA and SSN lines
5,4 Select a clock rate for the interface when the AMIS-53000 is master
3
Disable auto increment for I²C control interface register addressing
Additional interface options give the AMIS-53000 the flexibility to tailor the interface to specific requirements. These options are
available in the interface options register, and can be stored into EE at board assembly to best suit the application.
6.1.4.6. Pull Up Disable
The AMIS-53000 includes built in pull up resistors for use with the I²C operation to reduce the overall system component count. The
pull ups are asserted at POR until mode selection occurs. If mode is determined to be 3-wire, the pull ups are removed. If mode is
determined to be I²C, this option bit determines whether the pull ups are to be removed.
6.2 Command Register
The AMIS-53000 contains a single 8-bit register that allows single writes to the register to place the AMIS-53000 into a desired mode.
It is very important to remember that all registers associated with that mode must be preprogrammed for the single write to this register
to operate correctly.
The command register allows the user application to issue a single register write to the AMIS-53000 to initiate the function listed in
Table 17. When the function is started, the AMIS-53000 uses the register values associated with the function selected as the
parameters of the function. These register values will be the default values or the values the user application has written to the
registers before the function is called out in the command register.
Table 17: Command - 0X00 [0]
Bit
Command
[7:4] [3:0]
0000
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1111
Standby
Receive
Transmit
Idle
Idle Return
Write EE
Read EE
Calibrate QS Osc
Calibrate RC
Calibrate PLL
Calibrate LNA
ROM2Regs
Global Reset
[7:6] [5:0]
01
XXXXXX
100000
Single ADC
Conversion
11
XXXXXX
100000
Continuous ADC
Conversions
Comment
Put the part into standby
Put the part into receive mode
Put the part into transmit mode
Put the part into idle mode
Use to return to idle after interrupt for HK or receive during sniff
Write the content of the working registers into EE
Read the contents of the EE
Calibrates the Quick Start oscillator
Calibrates the 10kHz RC oscillator
Calibrates the PLL
Calibrates the LNA matching
Write the content of the ROM into the shadow registers
Resets the part completely
Do an ADC one time on the channel selected loop filter output
Do an ADC on the channel selected continuously loop filter output
Standby is both a state for the transceiver, and a command given to the transceiver. The actual operation of standby mode can be
either a low-power mode where all internal circuitry of the AMIS-53000 except for the interface will be disabled, or a clock-only mode
where the crystal oscillator will be enabled to continue providing a system clock for an external microprocessor. A bit available in the
general options A register allows selection of power-down or clock-only operation in standby mode.
AMI Semiconductor – Aug. 05, Rev. 1.0
35
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