mm908e626 Freescale Semiconductor, Inc, mm908e626 Datasheet - Page 22

• Manufacturer Part Number: mm908e626
• Description: Integrated Stepper Motor Driver With Embedded Mcu And Lin Serial Communication
• Manufacturer: Freescale Semiconductor, Inc

TXD Terminal
of the LIN transmitter (see
LOW, LIN output is low (dominant state). When TXD is HIGH,
the LIN output MOSFET is turned off. The TXD terminal has
an internal pullup current source in order to set the LIN bus in
recessive state in the event, for instance, the microcontroller
could not control it during system power-up or power-down.
RXD Terminal
reports the state of the LIN bus voltage. LIN HIGH (recessive
state) is reported by a high level on RXD, LIN LOW (dominant
state) by a low level on RXD.
Analog Multiplexer /ADOUT Terminal
ADC of the MCU (see
is used to read six internal diagnostic analog voltages.
Current Recopy
current sense circuits of the half-bridges. These sense
circuits offer a voltage proportional to the current through the
low-side MOSFET. High or low resolution is selectable:
5.0 V / 2.5 A or 5.0 V / 500 mA, respectively. (Refer to
Bridge Current Recopy on page
Temperature Sensor
This sensor offers a voltage that is proportional to the actual
chip junction temperature.
V
of the external supply voltage. The output of this voltage is
V
selected with the ADMUX Register.
Analog Multiplexer Configuration Register (ADMUX)
SS3, SS2, SS1, and SS0 — A / D Input Select Bits
microcontroller according to
SS3, SS2, SS1, and SS0 bits.
22
908E626
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Reset
Read
Write
SUP
SUP
The TXD terminal is the MCU interface to control the state
The RXD transceiver terminal is the MCU interface, which
The ADOUT terminal is the analog output interface to the
The analog multiplexer is connected to the four low-side
The 908E626 includes an on-chip temperature sensor.
The V
The different internal diagnostic analog voltages can be
These read / write bits select the input to the ADC in the
/ RATIO
Prescaler
SUP
Bit 7
Register Name and Address: ADMUX - $07
0
0
VSUP
prescaler permits the reading or measurement
6
0
0
.
Figure
5
0
0
Figure
Table
, page 2). An analog multiplexer
4
0
0
25.)
, page 2). When TXD is
4, page 22. Reset clears
SS3
3
0
SS2
2
0
SS1
1
0
Half-
Bit 0
SS0
0
Table 4. Analog Multiplexer Configuration Register
Power Output Register (POUT)
HVDDON — HVDD On Bit
HVDDON bit.
HALF-BRIDGES
output stages. The half-bridges can be used in H-Bridge,
high-side, or low-side configurations.
(HBOUT) owing to the fact that all half-bridge outputs are
switched off.
Reset
Notes
Read
Write
SS3
14.
This read/write bit enables HVDD output. Reset clears the
• 1 = HVDD enabled.
• 0 = HVDD disabled.
Outputs HB1 : HB4 provide four low-resistive half-bridge
Reset clears all bits in the H-Bridge Output Register
HB1: HB4 output features:
• Short circuit (overcurrent) protection on high-side and
• Current recopy feature (low side MOSFET).
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
low-side MOSFETs.
This bit must always be set to 0.
Bit 7 6
0
0
SS2
Register Name and Address: P
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
(14)
SS1
5
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Analog Integrated Circuit Device Data
(14)
4
0
0
SS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
(14)
3
0
0
Freescale Semiconductor
Current Recopy HB1
Current Recopy HB2
Current Recopy HB3
Current Recopy HB4
Temperature Sensor
V
OUT
(14)
SUP
2
0
0
Not Used
Channel
- $0b
Prescaler
HVDDO
1
N
0
Bit 0
(14)
0
0