AK7755EN_16 Datasheet, PDF (35/109 Pages) Asahi Kasei Microsystems – DSP with Mono ADC Stereo CODEC + Mic/Lineout Amp

[AK7755]
CONT04: Data RAM, CRAM Setting
W R Name D7
D6
D5
D4
D3
D2 D1
D0
Default
C4h 44h CONT04 DRMS[1] DRMS[0] DRAM[1] DRAM[0] POMODE 0 WAVP[1] WAVP[0] 00h
D7, D6: DRMS[1:0] Data RAM Size Setting
DSP Data RAM
DRAM DRMS
Bank1
Bank0
mode [1:0]
Memory
Memory
size[words]
size[words]
0
00
512
1536
1
01
1024
1024
2
10
1536
512
3
11
N/A
(default)
D5, D4: DRAM[1:0] Data RAM Addressing mode Setting
Addressing DRAM
DSP Data RAM
mode
[1:0] Bank1 DP1 Bnak0 DP0
0
00
Ring
Ring
1
01
Ring
Linear
2
10
Linear
Ring
3
11
Linear
Linear
(default)
D3: POMODE DLRAM Pointer 0 Select
0: DBUS Immediate (default)
1: OFREG
D1, D0: WAVP[1:0] CRAM Memory Assignment
WAVP mode WAVP[1:0]
FFT Point Number
0
00
33word
128
1
01
65word
256
2
10
129word
512
3
11
257word
1024
(default)
Write “0” into the “0” registers.
014006643-E-00
- 35 -
2014/10