DDX-4100
Regs. 7Ch and 7Eh:
These are the Vendor ID1 and ID2 registers. Any write request to one of these will be ignored.
Regs. 28h:
The
‘Extended Audio ID Register’
is read only. Therefore, any write request will be ignored.
Regs. 26h:
When a write request is issued the actual data written into the RAM register is
“xxxxxxxxxxxx1110’, where ‘x’ represents the incoming data.
Regs. 2Ah:
When a write request is issued the actual data written into the RAM register is
‘xxxxxx0111xxxxxx’, where ‘x’ represents the incoming data.
Regs. 32h and 34h:
Any write request into one of these
sample rate registers
will result in the value BB80h written into
the corresponding RAM register.
3.0 I
2
S INPUT INTERFACE CONFIGURATION
To configure the I
2
S input interface the
Configuration Register B (CRB)
is used. Using the three
I2S1_Align_x bits, one of the seven configuration modes can be selected. Table 2 describes each of
them.
Table 2
Mode
# of Slots
W. Length
Alignment
0
32
24
Left
1
32
24
Left
2
32
16
Right
3
32
24
Right
4
24
24
Left
5
Not Valid
Not Valid
Not Valid
6
24
16
Right
7
24
24
Right
By default the standard I
2
S input interface slave is provided (mode 1 in bits D0, D1,and D2 of register
CRB, I2SS_BICK_POL = 1 and I2SI_LRCK_Pol = 0)
3.0 I
2
S Input switching characteristics (10pF load, Fsm = 32 to 96kHz)
Refer to Figure 1.
BICKI FREQUENCY (master mode)
BICKI FREQUENCY (slave mode)
BICKI pulse width low (T0) (slave mode)
BICKI pulse width high (T0) (slave mode)
BICKI active to LRCKI edge delay (T2)
BICKI active to LRCKI edge delay (T3)
SDI valid to BICKI active setup (T4)
BICKI active to SDI hold time (T5)
BICKI falling to LRCKI edge (T6) (master mode)
BICKI falling to LRCKI edge (T6) (master mode)
Delay Slot
No
Yes
No
No
No
Not Valid
No
No
Notes
MSb first only
Slave only
Reserved, do not use
MSb first only. Slave only
Slave only
3.072MHz
6.4MHz max.
40ns min.
40ns min.
20ns min.
20ns min.
20ns min.
20ns min.
3ns min.
9ns max.
6
Details and Specifications are subject to change without notice