PMMA7450LR2 Freescale Semiconductor, Inc, PMMA7450LR2 Datasheet - Page 19

• Manufacturer Part Number: PMMA7450LR2
• Description: ?2g/?4g/?8g Three Axis Low-g Digital Output Accelerometer
• Manufacturer: Freescale Semiconductor, Inc

$1A: Level detection threshold limit value (Read/Write)
$1B: Pulse detection threshold limit value (Read/Write)
$1C: Pulse duration value (Read/Write)
$1D: Latency time value (Read/Write)
$1E: Time window for 2nd pulse value (Read/Write)
Sensors
Freescale Semiconductor
LDTH[7]
XPDTH
TW[7]
PD[7]
LT[7]
LDTH[7:0]: Level detection threshold value. If THOPT bit in Detection Control Register is “0”, it is unsigned 7 bits value and
LDTH[7] should be “0”. If THOPT bit is “1”, it is signed 8 bits value.
PDTH[6:0]: Pulse detection threshold value (unsigned 7 bits).
XPDTH: This bit should be “0”.
Min: PD[7:0] = 4’h01 = 0.5 ms
Max: PD[7:0] = 4’hFF = 127 ms
1 LSB = 0.5 ms
Min: LT[7:0] = 8’h01 = 1 ms
Max: LT[7:0] = 8’hFF = 255 ms
1 LSB = 1 ms
Min: TW[7:0] = 8’h01 = 0 ms (Single pulse detection)
Max: TW[7:0] = 8’hFF = 255 ms
1 LSB = 1 ms
D7
D7
D7
D7
D7
0
0
0
0
0
LDTH[6]
PDTH[6]
TW[6]
PD[6]
LT[6]
D6
D6
D6
D6
D6
0
0
0
0
0
PDTH[5]
LDTH[5]
TW[5]
PD[5]
LT[5]
D5
D5
D5
D5
D5
0
0
0
0
0
PDTH[4]
LDTH[4]
TW[4]
PD[4]
LT[4]
D4
D4
D4
D4
D4
0
0
0
0
0
LDTH[3]
PDTH[3]
TW[3]
PD[3]
LT[3]
D3
D3
D3
D3
D3
0
0
0
0
0
PDTH[2]
LDTH[2]
TW[2]
PD[2]
LT[2]
D2
D2
D2
D2
D2
0
0
0
0
0
PDTH[1]
LDTH[1]
TW[1]
PD[1]
LT[1]
D1
D1
D1
D1
D1
0
0
0
0
0
LDTH[0]
PDTH[0]
TW[0]
PD[0]
LT[0]
D0
D0
D0
D0
D0
0
0
1
1
0
Function
Function
Function
Function
Function
Default
Default
Default
Default
Default
Bit
Bit
Bit
Bit
Bit
MMA7450L
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