KX1400EW Keterex, KX1400EW Datasheet - Page 22

• 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. COMMAND SET
8.1. Reset
Description: The Reset command cancels any pending operation, immediately disables output to the
8.2. Stop
Description: When issued from the host MCU, the Stop command immediately terminates the execution
22
Encoding:
Encoding:
Options: Bit 4: Disable Memory I/F
Length: 8 Bits
Type: Control
Type: Control
Data: None
speaker driver, and resets the tone-duration setting to zero. The CLKOUT and GPO states
are not affected. The
command is encountered in a phrase played from external memory during stand-alone
mode, the phrase address counter is reset causing the phrase to be repeated continuously.
Setting the Disable Memory Interface option to logic one disables the external memory
interface and tri-states the following pins: MOSI, MISO, MCLK, and MSSL.
Bit 5: SPI Pass-Thru Mode
Setting the SPI Pass-Thru option to logic one connects the MCU host interface pins directly
to the external memory interface, allowing the external memory to be accessed in system
via the MCU host interface. Note: In SPI Pass-thru mode, the GPO1 pin is connected to
the MISO pin of the external memory interface. Once entered, the KX1400 remains in
Pass-thru mode until a device reset occurs (a power-off/power-on sequence or asserting
and releasing the
of any audio command. The speaker outputs are not automatically muted.
The Stop command is also used to mark the end of a phrase stored in external memory.
Once processing of a phrase from external memory begins, data and commands are
continually retrieved and processed until the Stop command is encountered. The last audio
command (e.g. Play Tone) issued before the Stop command in a phrase is not immediately
terminated but allowed to run to completion.
Note: The KX1400 will ignore all incoming commands while executing a Play ADPCM
command from external memory, including the Stop command. To stop a Play ADPCM
command from external memory, a hardware reset must be performed.
Bits 7-6
Bits 7-5
Unused
Unused
RST
¯¯¯
pin).
RDY
¯¯¯
pin is asserted at the end of the reset operation. If the Reset
SPI Pass Thru
Bit 5
Stand-by
Bit 4
Disable Mem I/F
Bits 3-0
Bit 4
0001
Bits 3-0
0000