CDB44800 Cirrus Logic Inc, CDB44800 Datasheet - Page 52

• Manufacturer Part Number: CDB44800
• Description: BOARD EVAL FOR CS44800 PWM CTRL
• Manufacturer: Cirrus Logic Inc
• Series: Popguard®r

Specifications of CDB44800

• Amplifier Type: Class D
• Output Type: 8-Channel
• Voltage - Supply: 20 V ~ 50 V
• Operating Temperature: -10°C ~ 70°C
• Board Type: Fully Populated
• Utilized Ic / Part: CS44800
• Description/function: Audio DSPs
• Operating Supply Voltage: 5 V
• Product: Audio Modules
• For Use With/related Products: CS44800
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Max Output Power X Channels @ Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 598-1532; CDB-44800

52
7.3.5
7.3.6
7.4
7.4.1
PDN_PWMB4
7
PWM Channel Power Down Control (address 03h)
Power Down Output Mode (PDN_OUTPUT_MODE)
Default = 0
0 - PWM Outputs are driven low during power down
1 - PWM Outputs are driven to the inactive state during power down
Function:
This bit is used to select the power-down state of the PWM output signals. When set to 0, each channel
which has been powered down, following the ramp-down cycle if enabled, will drive the output signals,
PWMOUTxx+ and PWMOUTxx-, low.
When set to 1, each channel which has been powered down, following the ramp-down cycle if enabled,
will drive the output signals to the inactive state. PWMOUTxx+ is driven low and PWMOUTxx- is driven
high.
Power Down (PDN)
Default = 1
0 - Normal Operation
1 - Power down
Function:
The entire device will enter a low-power state when this function is enabled, and the contents of the control
registers are retained in this mode. The power-down bit defaults to ‘enabled’ on power-up and must be
disabled before normal operation can occur.
Power Down PWM Channels (PDN_PWMB
Default = 11111111
0 - Normal Operation
1 - Power down PWM channel
Function:
The specific PWM channel is in the power-down state. All processing is halted for the specific channel,
but does not alter the setup or delay register values. The PWM output signals are driven to the appropriate
logic level as defined by the Power-Down Output Mode bit, PDN_OUTPUT_MODE. When set to normal
operation, the specific channel will power up according to the state of the RAMP[1:0] bits and the channel
output configuration selected. When transitioning from normal operation to power down, the specific chan-
nel will power down according to the state of the RAMP[1:0] bits and the channel output configuration se-
lected. Ramp control is found in
PDN_PWMA4
6
PDN_PWMB3
5
“Ramp Configuration (address 05h)” on page
PDN_PWMA3
4
PDN_PWMB2
3
4
:PDN_PWMA1)
PDN_PWMA2
2
PDN_PWMB1
54.
1
CS44800
PDN_PWMA1
DS632F1
0