AMIS-53000 Datasheet, PDF (45/99 Pages) AMI SEMICONDUCTOR – Frequency Agile Transceiver

AMIS-53000 Frequency Agile Transceiver
Data Sheet
Table 26: System Clock Control
Register
Number (HEX) Name
0X0C
General Options A
0X0D
0X10
General Options B
Idle Config
Function
Bits
11 POR starts in TX
10 POR starts in RX
2,1
01 POR starts in idle
00 POR starts in standby
0
Standby mode with system clock output
11 External XTAL reference divided by 2 (12MHz)
10 External XTAL reference divided by 4 (6MHz)
1,0
01 External XTAL reference divided by 8 (3MHz)
00 System clock off
11 System clock continues for 1024 clock cycles
10 System clock continues for 512 clock cycles
4,3
01 System clock continues for 256 clock cycles
00 System clock shuts down after idle command ASAP
Setup registers descriptions:
Crystal Oscillator Trim- The value of the calibration for the 10kHz oscillator. (See Section 6.10.1.1)**
6.4.4. Quick Start
The AMIS-53000 includes the ASTRIC family patented Quick Start oscillator. This circuit uses a “kicker” to force the crystal oscillator
close to the final desired frequency. This reduces the time required for the crystal oscillator to settle to the RF frequency.
Table 27: Kicker Calibration
Register
Number (HEX) Name
0X28
RF PLL Options
Function
Bits
7
Kicker calibration status
Setup registers descriptions:
Quick Start Trim- The value of the calibration for the kicker. (See Section 6.10.1.3)**
6.4.5. Self Calibration
The AMIS-53000 has internal trim functions for the PLL, TX PLL, RX PLL, 10kHz oscillator, and kicker (Quick Start). A self calibration
is started by writing an instruction to the command register. This self calibration needs to be done at least once after the AMIS-53000
has been powered on and before the AMIS-53000 is placed into any mode such as transmit or receive. The application should monitor
the status registers and trim value registers to determine that the calibration was successful.
Table 28: Self Calibration Command
Register
Number (HEX) Name
0X00
Command
0X1B
Housekeeping
Config
Code
0X07
0X08
0X09
0X0A
Bit 2
Bit 1
Bit 0
Function
Calibrate the Quick Start (kicker)
Calibrate the 10kHz oscillator
Calibrate the PLL
Calibrate the LNA
Calibrate PLL during HK
Calibrate 10kHz oscillator during HK
Calibrate kicker during HK
AMI Semiconductor – Aug. 05, Rev. 1.0
45
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