mma1605wr2 Freescale Semiconductor, Inc, mma1605wr2 Datasheet - Page 27

• Manufacturer Part Number: mma1605wr2
• Description: Dsi Inertial Sensor
• Manufacturer: Freescale Semiconductor, Inc

3.6
process as described in the following tables:
Table 9. Power-up or Under-Voltage Reset Initialization Process
Table 10. DSI Clear Command Initialization Process
Internal Delay
Sensors
Freescale Semiconductor
V
#
1 Power up to a Known State
3 Read Fuse Array and Copy to Memory Array (Mirror Registers)
4 Initialize DSI State Machine (the device is ready for DSI Messages)
5 Initialize the DSP (Acceleration Data is Valid)
#
1 the device logic comes out of reset
3 Read Fuse Array and Copy to Memory Array (Mirror Registers)
4 Initialize DSI State Machine (the device is ready for DSI Messages)
5 Initialize the DSP (Acceleration Data is Valid)
V
V
PORVREGA_r
DSI Ready
Following power-up, under-voltage reset or reception of a DSI Clear Command, the device proceeds through an initialization
PORHCAP_r
PORVREG_r
DSP_OUT
BUSIN’
V
V
V
REGA
HCAP
POR
Device Initialization
REG
Description
Description
t
INT_INIT
t
DSI_INIT
t
DSP_INIT
Figure 20. Initialization Timing
t
t
t
t
DSP_INIT
DSP_INIT
DSI_INIT
DSI_INIT
Time
Time
0
0
S Flag ST Flag
S Flag ST Flag
N/A
1
1
0
1
1
1
0
N/A
0
0
0
0
0
0
0
DSI Read Acceleration Data Long response = invalid data.
DSI Read Acceleration Data Long response = invalid data.
DSI Read Acceleration Data Short response = zero.
DSI Read Acceleration Data Short response = zero.
DSI Response
DSI Response
No Response
No Response
No Response
No Response
Normal
Normal
MMA16xxWR
27