Datasheet

AD73322
–20–
REV. B
Table XII. Control Register Map
Address (Binary) Name Description Type Width Reset Setting (Hex)
000 CRA Control Register A R/W 8 0x00
001 CRB Control Register B R/W 8 0x00
010 CRC Control Register C R/W 8 0x00
011 CRD Control Register D R/W 8 0x00
100 CRE Control Register E R/W 8 0x00
101 CRF Control Register F R/W 8 0x00
110 CRG Control Register G R/W 8 0x00
111 CRH Control Register H R/W 8 0x00
Table XIII. Control Word Description
151413121110987654321 0
C/D R/W Device Address Register Address Register Data
Control Frame Description
Bit 15 Control/Data When set high, it signifies a control word in Program or Mixed Program/Data Modes. When
set low, it signifies a data word in Mixed Program/Data Mode or an invalid control word in
Program Mode.
Bit 14 Read/Write When set low, it tells the device that the data field is to be written to the register selected by
the register field setting provided the address field is zero. When set high, it tells the device
that the selected register is to be written to the data field in the input serial register and that
the new control word is to be output from the device via the serial output.
Bits 13–11 Device Address This 3-bit field holds the address information. Only when this field is zero is a device se-
lected. If the address is not zero, it is decremented and the control word is passed out of
the device via the serial output.
Bits 10–8 Register Address This 3-bit field is used to select one of the eight control registers on the AD73322.
Bits 7–0 Register Data This 8-bit field holds the data that is to be written to or read from the selected register
provided the address field is zero.