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BU21009MUV Fiches technique(PDF) 11 Page - Rohm |
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BU21009MUV Fiches technique(HTML) 11 Page - Rohm |
11 / 14 page BU21009MUV Technical Note 11/13 www.rohm.com 2009.04 - Rev.B © 2009 ROHM Co., Ltd. All rights reserved. 【 FAh : Simultaneous Press and Idle Mode Entry】 Name: CMD Address: FAh Description: INTERMIT_EN : Intermittent and the drive are enable. : Whether intermittent is driven at the idol mode is selected. 1:Intermittent is driven. 0:Intermittent is not driven. Initial state:Intermittent is driven. IDLE_T[3:0] : non-detect time-out setting : This sets the time the chip takes to go from normal mode to idle mode in a period key inactivity. Duration = system clock x 2 19 x IDLE_T (Example of system clock 1[MHz]time : About 520[msec]) Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 FAh - - - INTERMIT_EN IDLE_T[3] IDLE_T[2] IDLE_T[1] IDLE_T[0] R/W - - - W W W W W Initial val. - - - 1 0 1 1 1 【 FBh : Gain Setting, Filter Function】 Name: GAIN_FILTER Address: FBh Description: Gain adjustment and setting of noise filter function. GAIN[2:0] : gain setting: It uses it for the gain adjustment in eight stages. Initial adjustment value:x1 GAIN[2:0] 000 001 010 011 100 101 110 111 Adjustment value x 1 x 4.22 x 8.4 x 16.5 x 23 x 46 x 69 x 92 FILTER_EN : Filter enable : Enables/disables setting of noise filter function 1 : enabled 0 : disabled Initial state : disabled DELTA[3:0] : Filter follow count setting : The follow count to which the noise filter function is effective is set. Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 FBh GAIN[2] GAIN [1] GAIN[0] FILTER_EN DELTA[3] DELTA[2] DELTA[1] DELTA[0] R/W W W W W W W W W Initial val. 0 0 0 0 0 0 1 0 【 FCh : Switch OFF -> ON Threshold】 Name: TH_ON Address: FCh Description: This register provides a threshold value for determining if a sensor has transitioned from OFF to ON. This is relative value from reference value (128d). So the absolute value of threshold is 128d + ON[6:0]. It makes a threshold value between TH_ON and TH_OFF. TH_ON must be bigger than TH_OFF (TH_ON >= TH_OFF) Maximum threshold is 256d and minimum value is 128d. Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 FCh - ON[6] ON[5] ON[4] ON[3] ON[2] ON[1] ON[0] R/W - W W W W W W W Initial val. - 0 0 1 0 0 0 0 |
Numéro de pièce similaire - BU21009MUV |
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Description similaire - BU21009MUV |
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