Epson S1C31D50 Technical Instructions page 351

Cmos 32-bit single chip microcontroller

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Wait STATE_x = "sp_state_mute"

Wait STATUS.READY = sp_status_ready

Set Sound Play COMMAND

COMMAND_x: "Release_Mute"

in Sound Play Function Registers(See Table 21.4.14.1)

Cortex Set HW Processor

Set HWPCMDTRG.HWP0TRG

HW Processor interrupts to cortex

Wait HWPINTF.HWP0IF = 1

check STATE_x = "sp_state_play", if necessary

Figure 21.4.9.2 "Release Mute" Command Flow.

S1C31D50 TECHNICAL MANUAL

Seiko Epson Corporation