Renesas M65881AFP - Manual (Page 18)

Rev.1.00 2003.05.08 page 18 of 23
M65881AFP
3. System2 Mode No setting bits means "Don't care".
Table 3-1 DC dithering selection at
∆Σ
block
Table 3-2 AC dithering selection at
∆Σ
block
Table 3-3 Setting of
∆Σ
block operating
The selection of primary master clock ( bit3: IMCKSEL )
L … 256fsi
H … 512fsi ( "512fsi" are divided into half "256fsi" and operate as primary master clock. )
Re-synchronization (bit6: SYNC)
Refer to Page9 in details on re-synchronous operation.
Resynchronization process starts by SYNC rise edge, therefore SYNC level must be fixed to
"L" just before SYNC operation.
"Enable" of a XfsoOUT output (bit7:XfsoOEN)
"L" ... Clock Output (enable)
"H"…
"L" fixed (disable)
bit Flag name
19 DCDSEL0
20 DCDSEL1
DC dithering 0.1%
H
L
DC dithering 0.2%
L
H
DC dithering 0.4%
H
H
bit Flag name
22 ACDSEL0
Non dithering
don't care
L 23 ACDSEL1
AC dithering A
L
H
AC dithering C
L
L
L 24 ACDSEL2 L H
AC dithering E
L
H
H
bit Flag / Pin code name
16 NSSPEED
16fso,6bit
L
16fso,5bit
L
16fso, 5bit
X
32fso, 5bit
H
L
( Secondary master clock
1024fso)
Pin MCKSEL
L
( Secondary master
clock 1024fso)
L
( Secondary master
clock 1024fso)
H
( Secondary master clock
512fso)
Non dithering
L
L
bit Flag name Functional Explanation H L INIT
1 MODE1 Mode settiing1 "H" fixed -
2 MODE2 Mode setting2 "L" fixed -
3 IMCKSEL Input master clock Selection 512fsi 256fsi L
4 -
5 -
6 SYNC Re-synchronization L
7 XFsoOEN XfsoOUT pin output "enable". disable enable L
8 ASYNCEN2 Asynchronous Detection Flag for secondary Side enable disable L
9 CHSEL L/R inversion of PWM output pin active non-active L
10 DRPOL ∆Σ
Block : Rch Input Phase Negative phase Positive phase L
11 SRCRST Sampling Rate Converter Reset active non-active L
12 CHRSEL L/R inversion of PWM output pin active non-active L
13 GIMUTE Zero Mute at Gain Control Input Clock active non-active L
14 NSPMUTE Duty 50% Mute for PWM Output active non-active L
15 PGMUTE G_MUTE of PWM Output Data active non-active L
16 NSSPEED
∆Σ
Block : Operating Speed 32fso 16fso L
17 NSOBIT
∆Σ
Block : Setting of Output bit number 5bit (31value) 6bit (63 value) L
18 DCDRPOL
∆Σ
Block : Rch Phase of AC dithering Negative phase Positive phase L
19 DCDSEL0 L
20 DCDSEL1 L
21 ACDRPOL
∆Σ
Block : Rch Phase of AC dithering Negative phase Positive phase L
22 ACDSEL0 L
23 ACDSEL1 L
24 ACDSEL2 L
L ->H : Resynchronization
∆Σ
Block : DC dithering selection
∆Σ
Block : AC dithering selection
Refer to Table 3-1
Refer to Table 3-2
L 17 NSOBIT H X H