908E425 Datasheet, PDF (29/49 Pages) Freescale Semiconductor, Inc – Integrated Quad Half H-Bridge with Power Supply, Embedded MCU, and LIN Serial Communication

FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
SPI:
AWDCC = 1
GS = 1
STOP
No
IRQ?
Yes
SPI:
Reason for Wakeup
SPI Command
STOP
MREG
No
AWD
Timer Overflow?
Yes
Switch on
Selected Hallport
Wait 40 µs
Operate
Assert IRQ_A
Yes
Hallport = 1
No
MREG = Main Voltage
Regulator
Switch off
Selected Hallport
Figure 16. Hall-Effect Sensor Input Pin Cyclic Check Wake-Up Feature
HALL-EFFECT SENSOR INPUT PIN CONTROL
REGISTER (HACTL)
Bits
Read
Write
Reset
Register Name and Address: HACTL - $08
7
6
5
4
3
2
1
0
0
0
0
0
0 H3EN H2EN H1EN
0
0
0
0
0
0
0
0
HALL-EFFECT SENSOR INPUT PIN ENABLE BITS
(H3EN : H1EN )
These read / write bits enable the Hall-effect sensor input
pins. Reset clears the H3EN : H1EN bits.
• 1 = Hall-effect sensor input pin Hx switched on and
sensed
Analog Integrated Circuit Device Data
Freescale Semiconductor
• 0 = Hall-effect sensor input pin Hx disabled
HALL-EFFECT SENSOR INPUT PIN STATUS
REGISTER (HASTAT)
Bits
Read
Write
Reset
Register Name and Address: HASTAT - $09
7
6
5
4
3
2
1
0
0
0
0
0
0 H3F H2F H1F
0
0
0
0
0
0
0
0
HALL-EFFECT SENSOR INPUT PIN FLAG BITS
(H3F : H1F )
These read-only flag bits reflect the input Hx while the Hall-
effect sensor input pin Hx is enabled (HxEN = 1). Reset
clears the H3F : H1F bits.
908E425
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