KX1400EW Keterex, KX1400EW Datasheet - Page 28

• Manufacturer Part Number: KX1400EW
• Description: Audio D/A Converter ICs KX1400 Audio Playback IC
• Manufacturer: Keterex

Specifications of KX1400EW

• Resolution: 12 bit
• Operating Supply Voltage: 2.7 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Maximum Power Dissipation: 120 mW
• Mounting Style: SMD/SMT
• Number Of Dac Outputs: 2
• Power Consumption: 320 mW
• Supply Current: 50 mA
• Thd Plus Noise: 40 dB
• Package / Case: SOIC-20
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

KX1400 Audio Playback IC
8.13. Play PCM
Description: The Play PCM command is used to send uncompressed 12-bit, two’s complement, PCM
28
Encoding:
Options: None
Length: 8 Bits
Length: 16 Bits
Type: Audio
Data: Bits 5-4: Clock Divisor
Data: Bits 15-4: PCM Data
The Clock-out Stop State option defines the output level of the CLKOUT pin when the
Clock-out signal is disabled. Setting this bit to logic one sets the CLKOUT output to a logic
level high state. Setting it to logic zero sets the CLKOUT output to logic level low.
Note: this option also allows the use of the CLKOUT pin as a general purpose output when
not using the clock-out feature. The CLKOUT pin may be toggled by toggling the Clock-out
Stop State bit while Clock-out Disable is set. The CLKOUT pin’s drive characteristic is
always push-pull.
Bit 7: Clock-out Disable
Setting the Clock-out Disable bit to logic one disables the clock-out feature and sets the
CLKOUT pin to the logic level defined by the Clock-out Stop State option. Setting it to logic
zero enables the Clock Output feature. The Clock Output feature is enabled by default
after a device reset (Clock-out Disable = 0).
Specifies the divisor used to divide the 8.2 MHz system clock before the signal is output on
the CLKOUT pin. The Clock Divisor is set to divide by 8 (1.024 MHz CLKOUT signal) by
default after a device reset.
audio data directly to the KX1400 audio processor in real time. If a new Play PCM or other
audio command is not issued within one sample period (125 µS) of the previous Play PCM
command, the audio processor will repeat the previous PCM audio data.
Uncompressed 12-bit, two’s-complement, PCM audio data sampled at 8 kHz.
PCM Data
Bits 15-4
(Bits 5-4)
DIVISOR
CLOCK
00
01
10
11
CLOCK DIVIDED BY:
8.2 MHz INTERNAL
Bits 3-0
1110
1
2
4
8
FREQUENCY
1.024 MHz
2.05 MHz
CLKOUT
8.2 MHz
4.1 MHz