si4430 Silicon Laboratories, si4430 Datasheet - Page 97

• Manufacturer Part Number: si4430
• Description: Si4430 Ism Transceiver
• Manufacturer: Silicon Laboratories

Register 17h. Wake-Up Timer Value 1
Register 18h. Wake-Up Timer Value 2
Register 19h. Low-Duty Cycle Mode Duration
Reset value = xxxxxxxx
Reset value = xxxxxxxx
Reset value = 00000001
Name
*Note: The period of the wake-up timer can be calculated as T
Name
*Note: The period of the wake-up timer can be calculated as T
Name
*Note: The period of the low-duty cycle ON time can be calculated as T
Type
Type
Type
Bit
Bit
Bit
7:0
7:0
7:0
Bit
Bit
Bit
as in the wake-up timer setting in "Register 14h. Wake-Up Timer Period 1".
wtm[15:8]
wtm[7:0]
ldc[7:0]
Name
Name
Name
D7
D7
D7
Wake Up Timer Current Mantissa (M) Value*.
Wake Up Timer Current Mantissa (M) Value*.
Low-Duty Cycle Mode Duration (LDC)*.
If enabled, the LDC will start together when the WUT is supposed to start, and the dura-
tion of the LDC is specified by the address 19h and the equation that goes with it. In order
for the LDC to work, the LDC value has to be smaller than the M value specified in regis-
ters 15h and 16h.
LDC = 0 is not allowed here. Write at least decimal 1.
D6
D6
D6
D5
D5
D5
Preliminary Rev. 0.4
D4
D4
D4
wtm[15:8]
wtm[7:0]
WUT
WUT
ldc[7:0]
R/W
R
R
= (4 x M x 2
= (4 x M x 2
Function
Function
Function
LDC_ON
D3
D3
D3
R
R
= (4 x LDC x 2
) / 32.768 ms.
) / 32.768 ms.
D2
D2
D2
R
) / 32.768 ms. R is the same
D1
D1
D1
Si4430
D0
D0
D0
97