AK7746 Datasheet, PDF (25/62 Pages) Asahi Kasei Microsystems – Audio DSP with 5-channel 24-bit ADC and Input Mux

[ASAHI KASEI]
[AK7746]
(2) Control registers
The control registers can be set via the microcomputer interface in addition to the control pins. These 8 registers consist of 7-bit data
however; SCLK always needs to be a16-bit clock (Command Code 8-bits, Data 8-bits). Each register is set after the last D0 data is
written. For the value to be written in the control registers see the description of the interface with microcomputer. The following
table describes the control register map.
These control registers are initialized by INIT_RESET =”L”, but these are NOT initialized by S_RESET ="L”.
Command
Code
WR
60h 70h
62h 72h
64h 74h
66h 76h
68h 78h
6Ah 7Ah
6Ch 7Ch
6Eh 7Eh
Name
CONT0
CONT1
CONT2
CONT3
CONT4
CONT5
CONT6
CONT7
D7
DFS[2]
DRAM
JX2_E
ASEL2[2]
SWAD1_N
OUT4E_N
TEST
SWQM2
TEST: for TEST (input 0), (X: it ignores input data, but should input 0).
D6
D5
D4
D3
D2
D1
D0 Default
DFS[1]
DFS[0]
DIFS
DIF[1]
DIF[0]
SETCK X
RM
BANK[1] BANK[0] CMP_N
SS[1]
SS[0]
X
JX1_E
JX0_E
SSDIN4
SSDIN3 SWQMD
TEST
X
ASEL2[1] ASEL2[0]
TEST
ASEL1[2] ASEL1[1] ASEL1[0] X
SWSDIN4_
N
SWSDIN3_
N
SWSDIN2_
N
SWSDIN1
SWADM3_ SWADM2_
N
N
X
OUT3E_N OUT2E_N OUT1E_N CLKOE_N
TEST
TEST
X
CLKS[1]
CLKS[0]
SWQ4
SWQ3
SWQ2
SWQ1
X
SWQM1 OUTA2E_N OUTA1E_N PSADM
PSAD2
PSAD1 X
0000 000X
0000 000X
0000 000X
0000 000X
0000 000X
0000 000X
0000 000X
0000 000X
1. CONT0 can be set only at system reset ( INIT_RESET =”H” & S_RESET =”L”).
2. It is recommended to set CONT1~CONT2, CONT4~CONT7 at system reset.
3. When changing the selector switch of CONT3, a click noise may occur. The selector switchs are set during the writing
timing of the CONT3 D0 (SCLK ↑).
4. The control registers can be read during run time.
5. The default setting is initialized by initial reset ( INIT_RESET =”L”).
[MS0369-E00]
- 25 -
2004/12