iC-MQ
PROGRAMMABLE 9-BIT
Sin/Cos INTERPOLATION IC WITH RS422 DRIVER
Rev D4, Page 15/39
I
2
C Slave Mode (ENSL = 1)
In this mode iC-MQ behaves like an I
2
C slave with the
device ID 0x55 and the configuration interface permits
write and read accesses to iC-MQ’s internal registers.
For chip release verification purposes an identification
value is stored under ROM address 0x2F; a write ac-
cess to this address is not permitted.
CHPREL
Code
0x00
0x04
0x08
0x09
Adr 0x2F, bit 7:0 (ROM)
Chip Release
Not available
iC-MQ 3
iC-MQ X
iC-MQ X1
Register
RAM Addr
0x00-0x21
0x22-0x2A
0x2B-0x2E
0x2F
0x30-0x33
0x34-0x3A
0x3B-0x3E
0x3F
0x40-0x43
Read access via I
2
C slave mode (ENSL = 1)
Content
Configuration data
(see EEPROM addresses 0x00-0x21)
Not available
Configuration data
(see EEPROM addresses 0x2B-0x2E)
Chip release CHPREL(7:0)
Configuration data
(see EEPROM addresses 0x30-0x33)
Not available
Configuration data
(see EEPROM addresses 0x2B-0x2E)
Chip release CHPREL(7:0)
Current error memory (only active when enabled by
EMASKE; messages will be transferred to
EEPROM Addresses 0x30-0x33)
Not available
Table 7: Chip Release
END
Code
0
1
Adr 0x02, bit 7
Function
Sin/D converter and line driver disabled
(RAM configuration data invalid)
Restart of Sin/D conversion, line driver active
(RAM configuration data valid)
0x44-0x7F
Table 9: RAM Read Access
Register
RAM Addr
0x00
0x01
0x02
Write access via I
2
C slave mode (ENSL = 1)
Access and conditions
Changes possible, no restrictions
Changes possible
(wrong entries for CFGIBN can limit functions)
Changes to bits 6:0 are permitted only when Sin/D
conversion is halted (END = 0, ie. bit 7);
Restarting Sin/D conversion by changing END (bit
7) is permitted only with no changes of operating
mode (bits 6:0 remain as set)
Changes possible, no restrictions
Changes to bits 7:4 and 2:0 are permitted
(ENSL, bit 3 must be kept 1)
Changes possible, no restrictions
Changes possible when Sin/D conversion is halted
(END = 0)
Changes possible, no restrictions
No write access permitted
No write access permitted
Not available
Table 8: Configuration Enable
0x03-0x16
0x17
0x18
0x19-0x21
0x2B-0x2E
0x2F-0x3F
0x40-0x43
0x44-0x7F
Table 10: RAM Write Access
Notes:
The converter function should be halted by
END = 0 for the deletion of errors saved in the EEP-
ROM (Dev-ID 0x50, Addresses 0x30-0x33). Other-
wise active errors could be transferred to the EEP-
ROM again (from addresses 0x40-0x43 if enabled by
EMASKE).
ICHAUS [ IC-HAUS GMBH ]
