m65818afp Renesas Electronics Corporation., m65818afp Datasheet - Page 30

• Manufacturer Part Number: m65818afp
• Description: Digital Amplifier Processor Of S-master* Technology
• Manufacturer: Renesas Electronics Corporation.

M65818AFP
• "Enable" of Primary Side Asynchronous Detection Flag (bi16: ASYNCEN1).
Bit16 controls "enable"/"disable" of primary-side-asynchronous-detection-circuit.
ASYNCEN1 :
Under condition of ASYNCEN1 ="L", primary side asynchronous detection is unavailable whether the clock is not
inputted to FsiI pin, thereby M65818AFP does not operate function under asynchronization, for instance mute
operation. However, Primary Side Asynchronous Detection is available only condition of `SACD-Fsi` mode.
• Selection of Muting operation at primary Side Asynchronous Detection (bit20:ASYNC1MODE)
"L" …Duty 50% Mute of PWM output at primary side asynchronous detection.
"H"… Input Zero Mute of the gain control at primary side asynchronous detection.
• Selection of Data Input Mode for external 8fs.(bit21: EXMODE)
"L"…A setup in case an external 8fs data input is secondary side synchronous.
"H"…A setup in case an external 8fs data input is primary side synchronous.
• Selection of PWM output form (bit22, 23:PWMMODE 0 and 1)
The selection of PWM output form 1, 2, 3, and 4 , refer to Chapter 5-12 for the details.
*NOTE1 : At the setting of PWM Output Form2
<The case of the setting for PWM output form2>
<The case of release for PWM output form2>
Rev.1.00, Sep.04.2003, page 30 of 38
(PWM Output 50% Mute doesn't be operated in this setting.)
(Data is inputted to Gain Control Block)
(Data is inputted to Sampling Rate Converter Block)
5.
PWM Output Form2 enable to operate the following conditions.
bit17 NSOBIT) "H" (5bit), bit16(NSSPEED)="L"(16 fso)
Only in terminal MCKSEL="L" (secondary side master clock 1024 fso)
In the case of setting and release for PWM Output Form2, set both flags as follows.
(1) Set to Serial Control System2 mode : bit17(NSOBIT)="H"
(2) Serial control System1 mode:bit22, 23(PWMMODE0,1)="H","L"
(1) Serial control System1 mode:bit22, bit 23 (PWMMODE 0 , 1) is set as the Form to be used.
(2) Serial Control System2 mode:bit17(NSOBIT),bit16(NSSPEED) is set the condition to be used.
• Serial Control System1 Mode, bit 22, 23 (PWMMODE0,1 )
• Serial Control System2 Mode: bit16 (NSSPEED), bit17 (NSOBIT)
(To be set as MCKSEL="L" in advance is required.)
When a setup of both (1) and (2) is completed, it changes to Form2. When (2) is set up before (1), The term until
a setup of (1) holds the last PWM Output Form.
When a setup of (1) is completed, PWM Output Form changes. When (2) is set up before (1), a term until a
setup of (1) is worked keeps the Form 2 in the state of serial control System2 mode:bit17(NSOBIT) ="H",
bit16(NSSPEED) ="L".
"L"…disable.
"H"…enable.
bit16(NSSPEED )="L".
Refer to Table 6-2-