IC-TW8_13 Datasheet, PDF (31/63 Pages) IC-Haus GmbH – 16-BIT SIN/COS INTERPOLATOR WITH AUTO-CALIBRATION

iC-TW8 16-BIT SIN/COS INTERPOLATOR
Serial Configuration Mode
preliminary
Jan 9, 2013 Page SC4/36
Functional Block Diagram
A functional block diagram of the iC-TW8 is shown
in Figure 2 and explained on the following pages.
Digital
Offset Correction
Sensor Distortion
Analog
Anti-Aliasing
Gain _Analog Filter
Gain Match Correction
Phase Correction
Correction
(Lookup Table)
Digital
Hysteresis
AB/PWM Output
Generator
Offset
Analog-to-Digital
Filter
Interpolation Factor
Correction
Converters
Angle Calculation
(Servo Loop)
Calculation
SIN+
SIN–
COS+
COS–
ZERO+
ZERO–
CALIB
XIN
XOUT
xRST
PGA
ADC
Error
Corr.
Arc-
tan
LUT Filter Hyst
Inter
PGA
ADC
AB Signal Path
x8
Delay
Z Comparator
Z Signal Path
Auto Calibration
Auto Adaption
Auto Store
Clock
Generator
ADC Quality Monitor
Adaption Quality Monitor
Power-On
Reset
Fault
Handling
Internal
Memory
Serial
Ports
EEPROM
Interface
OUTA
OUTB
OUTZ
SPI_xSS
SPI_SCLK
SPI_SI
SPI_SO
IR
WP
SCL
SDA
STATUS FAULT
Figure 2: Block Diagram
Clock Generator
The Clock Generator uses an external crystal or oth-
er clock source to generate the internal core clock
(fcore) for the iC-TW8. An internal oscillator is also
provided which can be used if an external crystal is
not desired. The internal core clock controls all tim-
ing within the iC-TW8.
Power-On Reset
The Power-On Reset (POR) circuit provides orderly
startup of the iC-TW8 when power is applied. An
external reset source can also be connected to the
POR to allow independent control of device startup.
Serial Ports
The iC-TW8 contains two serial ports that may be
used for communication. These are a standard SPI
(Serial Peripheral Interface) slave port and a 1-wire
port, both of which utilize the same communication
protocol (see Serial Communication Ports in the
Programmer’s Reference). Both ports may be used
simultaneously.
EEPROM Interface
A 24xx02 through 24xx16 family I²C EEPROM is
required for storage of sensor calibration data (off-
set, gain, etc.). The EEPROM connects directly to
the iC-TW8 via the dedicated I²C EEPROM inter-
face.
Internal Memory
The iC-TW8 provides 32K bytes of internal
memory divided into eight functional blocks that
can be accessed by the user via either of the serial
ports. See Internal Memory in the Programmer’s
Reference for more information.
Copyright © 2011–2013 iC-Haus
http://www.ichaus.com