
TC32306FTG
2015-10-01
47
4.
The setup sequence and operation of internal function blocks will start after setting Delay time
from the output level of Reference Clock Oscillator is over a certain level.
5.
Signal Detections (RSSI & Noise Detection) with operating cycle (Initial value: 1.35 ms) set by
register will start after the internal setup (about 0.22 ms) is finished.
6.
Start timing of the demodulation output (from DATA_IO pin) is varied with Bit Rate Filter
setting, data rate or other register settings. Preamble Detection output starts after the
demodulation output is obtained.
Fig 6-29 Example of Boot Sequence Timing Chart (SPI Mode / RX)
* The example of timing chart may be omitted or simplified for explanatory purposes.
Notice:
-
To shorten the boot sequence of this IC, there is other way to be able to moving to Run without
going through Standby. In this method, firstly set ENB pin = "H", h'0A [D7] ENB = "1" and h'0A
[D6] ACT = "1", then set other registers. But in this way, if the internal setup and the register
setting are overlapped each other, unexpected operation may occur. To avoid above, make the SPI
speed too fast enough to communicate, or select the previous way as in Fig 6-29.
-
Check the relationship between supply voltage and reset, when to utilize the power on reset
during boot sequence. (See the notice in 6.3.1)
- Example of Boot Sequence 2: TX (in SPI Mode)
The following Fig 6-30 shows status transition from Battery Saving/Standby to TX-Run.
Control Command
(
SPI
)
Internal Regulator
(voltage)
Level of
Reference Clock
Internal Counter
Demodulation Output
: at DATA_IO pin
RESET
Voltage Supply
PLL_LD Signal
: at DET_TMONI1 / 2 pin
Signal Detections
(RSSI / Noise Detection)
: at DET_TMONI1 / 2 pin
ENB
In this example, ENB pin and voltage supply are connected.
Register Setting:
h‛
0A[D7]ENB="1",
h‛
0A[D6]ACT="0"
Register Setting:
h‛
0A[D7]ENB="1",
h‛
0A[D6]ACT="1"
Register
Settings
105.5
μ
s
*: Initial Value
It indicates typical.
Starting the system clock
input to logic circuit
Delay Time Setting
* 105.5
μ
s / 211.1
μ
s / 316.5
μ
s / 527.5
μ
s / 949.5
μ
s
About 0.22ms
Detection Setup
Detection Cycle Setting
0.338ms / 0.675ms / * 1.35ms / 2.70ms
1.35ms
1.35ms
1.35ms
1.35ms
About
0.1ms
Start of the demodulation output depends on Bit
Rate Filter setting or others.
High Impedance
Demodulation Output