iC-TW2 8-BIT SIN/COS INTERPOLATION IC
WITH INTEGRATED EEPROM
Rev D3, Page 27/30
TEST MODES
EN_MON
Addr. 0x0B; bit 3
Function
R/W
The iC-TW2 provides various control bits located in dif-
Code
ferent registers to enable or disable certain test modes.
The majority of these is only required for extended chip
testing capability, others are required for production
test.
0
1
Position monitor disabled default
Monitor enabled
Table 39: Position monitor control
GRANULAR
Addr. 0x05; bit 7
Function, test mode only
normal operation
R/W
Code
MONITOR(7:0)
Addr. 0x0F; bit 7:0
R/W
0
1
Code
Function
test mode only
Access to the internal absolute period position. RT
only!
Table 35: A/B output edge granularity control
Table 40: Monitor register
VC(1:0)
Code
Addr. 0x0A; bit 6:5
R/W
Function, test mode only
EE_READ
Addr. 0x0E; bit 7
Function
Normal operation
W
register must be set to 0 for correct device
functionality
Code
0
1
Read all iC-TW2 registers from the EEPROM. Bit is
automatically reset upon completion. Not required
during normal operation since this is done
automatically on start-up.
Table 36: Reference voltage fine tuning
CLKMODE
Addr. 0x0B; bit 0
Function, test mode only
R/W
Code
Table 41: EEPROM read command register
0
1
Select comparator clock default
Select direct oscillator clock
Production test control bits
Production test control bits are reserved bits. Do not
use the production test control bits during normal op-
eration. Keep reserved bits ”0”.
Table 37: Clock source select
CLKDLY
Addr. 0x0B; bit 2
Function
R/W
Code
Reserved
Reserved
Reserved
Code
Addr. 0xC; bit 7:1
Addr. 0xD; bit 7:0
Addr. 0xE; bit 2:0
R/W
R/W
R/W
0
1
Normal operation
Add clock delay
Function
Table 38: Clock distribution delay line selection
0
Normal operation
1 . . .
Do not use or alter to
Enabling the position monitor will allow access to the
internal absolute period position. The position can be
read through register 0x0F. This is considered a test
mode and should not be used during normal opera-
tion.
Table 42: Test modes
ICHAUS [ IC-HAUS GMBH ]
