mc1451a-e ETC-unknow, mc1451a-e Datasheet - Page 16

• Manufacturer Part Number: mc1451a-e
• Description: Advanced Brushless Motor Control Chipset
• Manufacturer: ETC-unknow

IC
CP
CP
CP
CP
CP
CP
CP
CP
CP
Pin Name
ClkOut
~Reset
I/OCntrl0
I/OCntrl1
I/OCntrl2
I/OCntrl3
Data0
Data1
Data2
Data3
Data4
Data5
Data6
Data7
Data8
Data9
Data10
Data11
DACLow0
DACLow1
DACLow2
DACLow3
I/OAddr0
I/OAddr1
I/OAddr2
I/OAddr3
I/OWrite
Vcc
GND
Pin #
19
17
16
18
68
67
60
59
58
57
50
49
46
43
40
39
36
35
64
63
62
61
28
9
6
5
15
4, 22, 33
3, 34
Description/Functionality
Clock Out (output). This pin provides a clock output which is 1/4 the ClkIn frequency. This pin
is connected to I/OClkin (I/O chip).
Master chip set reset (input). When brought low, this pin resets the chip set to its initial
condition. Reset should occur no less than 250 mSec after stable power has been provided
to the chip set.
I/O chip to CP chip communication control (mixed). These signals are connected to the
corresponding CPCntrl0-3 pins on the I/O chip, and provide control signals to facilitate CP to
I/O communication.
Multi-purpose Data0-11. (Bi-directional). These pins have 2 functions:
1) Pins Data4-11 (8 bits total) are connected to the corresponding CPData4-11 pins on the
I/O chip, and are used to communicate between the CP and I/O chips
2) Pins Data0-11 hold the high 12 bits of the DAC output value when the output mode is set
to 16-bit DAC.
DACLow0-3 (output). These pins hold the lowest 4 bits of the 16 bit DAC output word when
the output mode is set to 16 bit DAC. These pins, in conjunction with Data0-11 (providing the
high 12 bits) make up the 16-bit DAC output word.
Multi-purpose Address0-3 (output). These pins are connected to the corresponding CPAddr0-
3 pins on the I/O chip. They have 2 functions; They provide addressing signals to facilitate
communication between the I/O chip and CP chip, and they are used during DAC data
decoding. To read a valid DAC value from Data0-Data11 (CP chip), DACSlct (I/O chip) and
I/OAddr0-3 (CP chip) must all be high, and I/OWrite (CP chip) must be low.
Multi-purpose write (output). This pin is connected to CPWrite on the I/O chip. It has 2
functions:
1) It provides a control signal to the I/O chip to facilitate communication between the I/O chip
and CP chip.
2) It is used during DAC data decoding to read a valid DAC value from Data0-Data11 (CP
chip), DACSlct (I/O chip) and I/OAddr0-3 (CP chip) must all be high, and I/OWrite (CP chip)
must be low.
CP chip supply voltage pin. All of these pins must be connected to the supply voltage. Supply
voltage = 4.75 to 5,.25 V
CP chip ground pin. All of these pins must be connected to the power supply return.
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