Delta Tau GEO BRICK LV User Manual

Turbo PMAC System Configuration and Auto Configuration 

27 

PMAC2 Gate Array IC Clock Control

24

Data

1
3

1

2

n

1

2

n

1

2

n

1

2

n

PWM

Up/Down

Counter

6

Address

1

2

n

1

2

n

x6 Phase

Locked Loop

16

External

Phase

External

Servo

n = 0 - 15

n = 0 - 15

n = 0 - 7

n = 0 - 7

n = 0 - 7

n = 0 - 7

PHASE

SERVO

ADCCLK

DACCLK

PFMCLK

SLCK

DT / PW

PWM COUNT

16

8

40 MHz

Phase

Clock Control

Encoder Sample

Clock Control

PFM

Clock Control

DAC

Clock Control

ADC

Clock Control

Servo

Clock Control

Int/Ext Phase

Int/Ext Servo

PWM Max

Count

PWM Dead Time/

PFM Pulse Width

20 MHz

Max Phase

120 MHz

SIGN

DIR

 

I7m00/I6800 MaxPhase Frequency Control 

I7m00 for Servo IC m (or I6800 for MACRO IC 0) for the IC selected as system clock source sets the 
frequency of the internal MaxPhase clock signal, the maximum possible phase clock frequency.  It does 
so according to the formula: 

+

=

 

At the default value of 6527, it sets a 9.04 kHz frequency for MaxPhase. 

I7m00 also sets the PWM output frequency for all channels on Servo IC m; this frequency is equal to 
exactly half of the MaxPhase frequency. 

I7m01/I6801 Phase Clock Frequency Control 

I7m01 for Servo IC m (or I6801 for MACRO IC 1) for the IC selected as system clock source sets the 
frequency of the phase clock signal for the system, controlling its division from the MaxPhase clock 
frequency.  It does so according to the formula: 

+

=

 

At the default value of 0 (divide by 1) and the default MaxPhase frequency of 9.04 kHz, this sets a phase 
clock frequency of 9.04 kHz (110 µsec period). 

I7m02/I6802 Servo Clock Frequency Control 

I7m02 for Servo IC m (or I6802 for MACRO IC 1) for the IC selected as system clock source sets the 
frequency of the servo clock signal for the system, controlling its division from the phase clock 
frequency.  It does so according to the formula: 

+

=