ADMC201

REV. B

–13–

Table VII. SYSCTRL Analog Input Channel Selection

Bit 3

Bit 4

Channels Converted

Mode

0

0

V, W (Default)

Two-/Three-Phase

0

1

V, W, AUX

Two-/Three-Phase

1

0

U, V, W

Three-/Three-Phase

1

1

U, V, W, AUX

Three-/Three-Phase

Bit 0, 1 Auxiliary Channel Selection.

Bit 3

Channel U Conversion Enable. If Bit 3 is set to 1, then

Channel U will be converted along with V, W and/or

AUX. This bit selects three-/three-phase mode.

Bit 4

Aux Channel Conversion Enable. If Bit 4 is set to

1, then the AUX input will be converted along with

the channels V, W and/or U.

Bit 5

If Bit 5 = 1, then the external clock will be divided by

two to derive the system clock. If the external clock

frequency is greater than 12.5 MHz, then this bit must

be set.

Bit 6

Park Interrupt Enable. This bit allows interrupts to

be generated when the Park rotation is completed.

Bit 7

ADC Interrupt Enable. This bit allows interrupts to

be generated when the analog-to-digital conversion

process is complete.

Bit 8

IRQ Pin Format—Edge or Level Interrupt Selection.

If Bit 8 is set to 0, then an interrupt will cause a

pulse of one system clock to be generated on the

IRQ pin. If Bit 8 is set to 1, then an interrupt

causes the

IRQ output to go LOW (logic 0). The IRQ

output pin will remain LOW until the SYSSTAT

register is read.

Bit 10

If Bit 10 is set to 1, then the reverse Park transforma-

tion will be formed in 3/3 mode. For Forward

transformations, this bit must be set to 1.

Table V. System Control (SYSCTRL) Registers

RESET

Bit

Function

Default

0

Auxiliary Channel Selection

0

1

Auxiliary Channel Selection

0

3

Enables U Channel Conversion

(1 = Enable) Two-/Three-Phase Mode

0

4

Enables AUX Channel Conversion

(0 = Disable, 1 = Enable)

0

5

Divide External Clock by 2

(0 = No, 1 = Yes)

0

6

Park Interrupt Enable

0

7

ADC Interrupt Enable

(0 = Disable, 1 = Enable)

0

8

IRQ Pin Format (Edge or Level Based

Interrupt Requests) (0 = Edge)

0

10

Reverse Rotation (0 = 2/3, 1 = 3/3)

0

Forward Rotation (1 = Enable)

Table VI. SYSCTRL Auxiliary Channel Selection

Bit 0

Bit 1

Auxiliary Channels Converted

0

0

AUX0

0

1

AUX1

1

0

AUX2

1

1

AUX3