ml7084-001 Oki Semiconductor, ml7084-001 Datasheet - Page 203

• Manufacturer Part Number: ml7084-001
• Description: 4ch Voip Codec
• Manufacturer: Oki Semiconductor

Dial Pulse Transmitter 1 (DPGEN1)
If the general-purpose input/output port GPIOA[1] is configured as its secondary function (DPO1: dial pulse output
pin), the dial pulse transmitter 1 can output dial pulse signals.
The dial pulse transmitter 1 is enabled when the DPGEN1 transmission control register (DPGEN1_EN) is “1”, and
outputs dial pulse signals for the number of pulses set in the DPGEN1 dial pulse count setting register
(DPGEN1_D[3:0]). Figure 58 shows the dial pulse output timing.
The speed of dial pulses can be chosen between 10 pps and 20 pps with the DPGEN1 speed control register
(DPGEN1_PPS). The make ratio can also be adjusted by setting the duration of the break interval by
DPGEN1_DUTY. Additionally, the output polarity of dial pulse signals can be changed by the DPGEN1 output
polarity control register (DPGEN1_POL).
A. DPGEN1 transmission control register (DPGEN1_EN)
B. DPGEN1 dial pulse count setting register (DPGEN1_D[3:0])
OKI Semiconductor
0 : Stops transmission (Initial value)
1 : Carries out transmission
Initial value : 0h
Upper limit: 10 (data: Ah)
Lower limit: 1 (data: 1h)
GPIOA[1]
/DPO1
GPIOA[1]
/DPO1
Positive logic
Negative logic
DPGEN1_EN
DPGEN1_EN
- When the dial pulse speed is 10 pps, the output polarity is positive logic,
- When the dial pulse speed is 10 pps, the output polarity is negative logic, and
Setting of output polarity and adjustment of make ratio
and the number of output pulses is 10:
the number of output pulses is 2:
GPIOA[1]
GPIOA[1]
/DPO1
/DPO1
Figure 58 Dial Pulse Output Timing
Output polarity can be changed (DPGEN1_POL).
The make ratio can be adjusted by setting the duration of the break
interval (DPGEN1_DUTY).
0.1 sec/10 pps (0.05 sec/20 pps)
interval
DPGEN1_OFF_TIM
Break
interval
Make
interval
Break
DPGEN1_OFF_TIM
interval
Make
FEDL7224-001FULL-01
ML7224-001TC
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