ml7074a-003 Oki Semiconductor, ml7074a-003 Datasheet - Page 20

• Manufacturer Part Number: ml7074a-003
• Description: Voip Codec
• Manufacturer: Oki Semiconductor

These are input pins for testing purposes only. Keep the inputs to these pins at the “0” level during normal use
This is the interrupt request output pin. An “L” level is output for a duration of about 1.0 µsec at this pin when
This output will be maintained at the “H” level when there is no change in state of any of the interrupt causes. The
• Underflow error (CR3-B0)
• Overrun error (CR3-B1)
• When a dial pulse is detected (CR4-B6).
• When a DTMF signal is detected (CR4-B4).
• When DTMF_CODEC0, 1, 2, 3 are detected (CR4-B0, B1, B2, B3).
• When TONE0 is detected (CR3-B3).
• When TONE1 is detected (CR3-B4).
• When FGEN_RQ is generated (CR3-B6).
• When DSP_ERR is detected (CR3-B7).
conditions.
there is a change in state of an interrupt cause.
actual interrupt cause generating the interrupt can be verified by reading CR3 and CR4. The different interrupt
causes are described below.
TST0, TST1, TST2, TST3
INTB
OKI Semiconductor
An interrupt is generated when a 2100 Hz tone signal is detected.
An interrupt is generated when there is a change to the non-detection condition in the tone signal detection
condition.
An interrupt is generated when the FSK generator makes a request for the next data to be transmitted.
An interrupt is generated when there is a change from the condition in which the FSK generator is requesting for
An interrupt is generated when any error occurs in the DSP inside the LSI.
An interrupt is generated when an internal read from the receive buffer occurs before the writing into the receive
buffer from the MCU has been completed.
An interrupt is generated when a normal writing is made in the receive buffer by the MCU and the underflow
error is released.
An interrupt is generated when an internal write of the next data into the transmit buffer occurs before the
transmit buffer data read out from the MCU has been completed.
An interrupt is generated when a normal read out is made from the transmit buffer by the MCU and the overrun
error is released.
An interrupt is generated when a DTMF signal is detected.
An interrupt is generated when there is a change from the DTMF signal detected state to the no-detected state.
An interrupt is generated when there is a change in the detected code (CR4-B0, B1, B2, B3) in the condition in
which a DTMF signal is being detected.
An interrupt is generated when a 1650 Hz tone signal is detected.
An interrupt is generated when there is a change to the non-detection condition in the tone signal detection
condition.
transmission data to the condition in which there is no request for internal fetch of the data to be transmitted next.
FEDL7074-003FULL-01
ML7074-003 GA
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