ML7396AB datasheet(68/140 Pages) LAPIS

68 / 140 page

FEDL7396A/B/E-07

ML7396A/B/E

68/140

●Ramp control function

ML7396 has Ramp control function. This function will contribute reducing spurious emission when transmission is

terminated. Ramp control will be executed when switching TX_ON to TRX_OFF state and TX_ON to RX_ON state.

The following are control bits retative with ramp control function.

TXOFF_RAMP_EN ([RAMP_CNTRL:B2 0x2C(4)]): Ramp control enable bit

TIM_TX_OFF1[7:0] ([TX_OFF_ADD1:B1 0x55(7-0)]): Ramp down timing adjustment when transitioning from TX_ON

to TRX_OFF.

TIM_RX_ON2[2:0] ([RX_ON_ADJ2:B1 0x3F(6-4)]): RX_ON timing adjustment when transitioning from TX_ON to

RX_ON

TIM_TX_OFF2[5:0] [2DIV_GAIN_CONTRL:B0 0x6E(7-2)]): Ramp down timing adjustment when transitioning from

TX_ON to RX_ON.

[Operation Overview]

(1) Ramp down timing when transitioning from TX_ON to TRX_OFF

[Condition]

TXOFF_RAMP_EN ([RAMP_CNTRL:B2 0x2C(4)]) =0b1

TIM_TX_OFF1[7:0] ([TX_OFF_ADD1:B1 0x55(7-0)] =0xb4(400 μs), 0x42 (150μs)

TIM_RX_ON2[2:0] ([RX_ON_ADJ2:B1 0x3F(6-4)]) =0b011

TIM_TX_OFF2[5:0] ([2DIV_GAIN_CONTRL:B0 0x6E(7-2)]) =0b1011_01

TRX_OFF command

* SET_TRX[3:0] ([RF_STATUS:B0 0x6C(4-0)]) =0b1000

SCEN

PA enable

TX enable

RX enable

3μs

(TIM_TX_OFF1+1) * 2.22μs = 401.82μs

ML7396AB Datasheet(PDF) 68 Page - LAPIS Semiconductor Co., Ltd.