ADAV400 Analog Devices, ADAV400 Datasheet - Page 24

• Manufacturer Part Number: ADAV400
• Description: Audio Codec
• Manufacturer: Analog Devices

ADAV400
CONTROL PORT READ/WRITE DATA FORMATS
The read/write formats of the control port are designed to be
byte-oriented. To conform to this byte-oriented format, 0s are
appended to the data fields before the MSB to extend the data-
word to the next multiple of eight bits. For example, for
parameter RAM a 28-bit word is appended with four leading 0s,
making the transfer 4 bytes; for program RAM a 42-bit word is
appended with six leading 0s, making the transfer 6 bytes. The
data fields are appended to a 3-byte field consisting of a 7-bit
Table 16. Parameter RAM Read/Write Format (Single Address)
Byte 0
chip_adr [6:0], R/W
Table 17. Parameter RAM Block Read/Write Format (Burst Mode)
Byte 0
chip_adr [6:0], R/W
Table 18. Program RAM Read/Write Format (Single Address)
Byte 0
chip_adr [6:0], R/W
Table 19. Program RAM Block Read/Write Format (Burst Mode)
Byte 0
chip_adr [6:0], R/W
Table 20. Control Register Read/Write Format (16-bit register)
Byte 0
chip_adr [6:0], R/W
Table 21. Control Register Read/Write Format (8-bit register)
Byte 0
chip_adr [6:0], R/W
Table 22. Data Capture Register Write Format
Byte 0
chip_adr [6:0], R/W
Table 23. Data Capture (Control Port Readback) Register Read Format
Byte 0
chip_adr [6:0], R/W
Byte 1
000, param_adr [12:8]
Byte 1
000, param_adr [12:8]
Byte 1
000, prog_adr [12:8]
Byte1
000, reg_adr [12:8]
Byte1
000, reg_adr [12:8]
Byte 1
000, data_capture_adr [12:8]
Byte 1
000, data_capture_adr [12:8]
Byte 1
000, prog_adr [12:8]
Byte 2
param_adr [7:0]
Byte 2
prog_adr [7:0]
First program word (prog_adr)
Byte 2
reg_adr [7:0]
Byte 2
reg_adr [7:0]
Byte 2
data_capture_adr [7:0]
Byte 2
data_capture_adr [7:0]
Rev. 0 | Page 24 of 36
Byte 3
0000, param [27:24]
First parameter (param_adr)
Byte 2
param_adr [7:0]
Byte 2
prog_adr [7:0]
Bytes 3 to 8
prog [39:0]
chip address, a read/write bit, and an 11-bit RAM/register
address for full I
Burst mode is used to fill contiguous register or RAM locations.
A burst mode write is done by writing the address and data of
the first RAM/register location to be written followed by the
next data-word, and so on. The ADAV400 control port auto-
increments the internal address counter depending on the
location being written to or read from, even across the
boundaries of the different RAMs and registers locations.
Byte 3
data [7:0]
Byte 3
000, progCount [10:6]
Bytes 3 to 5
data [23:0]
Byte 3
data [15:8]
Bytes 4 to 6
param [23:0]
Bytes 9 to 14
Second program word
(prog_adr + 1)
Byte 3
0000, param [27:24]
2
C transfer.
Bytes 7 to 10
0000 param [27:0]
Second parameter
(param_adr + 1)
Bytes 3 to 8
prog [42:0]
Byte 4
data [7:0]
Byte 4
progCount [5:0], regSel [1:0]
Bytes 15 to 20
Third program word
(prog_adr + 2)
Bytes 11 to 14
0000 param [27:0]
Third parameter
(param_adr + 2)
Bytes 4 to 6
param [23:0]