MC68HC05V12 Datasheet, PDF (183/246 Pages) Freescale Semiconductor, Inc – HCMOS Microcontreller Unit

Freescale Semiconductor, Inc.
Gauge Drivers
Gauge System Overview
direction positive current means current flow is out of the pin with the +
in its name and into the pin with − in its name. Negative current means
current is flowing into the pin with the + in its name and out of the pin with
− in its name.
R_MAX
I_MAX
I to V
CONVERTER
1%
Vref
8-BIT
D/A
D/A AMP
+
_
8
12-TO-1
8-BITMUX
8 * 12
12 CURRENT
MAGNITUDE
AND
6 CURRENT
DIRECTION
REGISTERS
SAMPLE AND HOLD MUX
AND CURRENT SENSE MUX
COIL DRIVERS
S&H ^{COIL 1}
S&H ^{COIL 2}
MAJA1+
MAJA1−
MAJA2+
MAJA2−
S&H ^{COIL 1}
S&H ^{COIL 2}
MAJB1+
MAJB1−
MAJB2+
MAJB2−
S&H ^{COIL 1}
S&H ^{COIL 2}
MINA1
MINA2+
MINA2−
COIL SEQUENCER
AND CONTROL
REGISTER
S&H ^{COIL 1}
S&H ^{COIL 2}
MIND1
MIND2+
MIND2−
12
MUX CONTROL
Figure 15-1. Gauge Driver Block Diagram
MC68HC05V12 — Rev. 2.0
Gauge Drivers
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Go to: www.freescale.com
Technical Data