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MSM7584D Datasheet(PDF) 53 Page - OKI electronic componets |
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MSM7584D Datasheet(HTML) 53 Page - OKI electronic componets |
53 / 58 page ¡ Semiconductor MSM7584D 53/58 FEDL7584D-02 METHODS OF RECORDING AND PLAYBACK Recording Method (See the flow chart in Figure 18) (1) • Set up the connection between the serial register/ voice ROM and ADPCM transmit-receive system. (See Figure 20) (CR5 - B7) • Specify the serial register/voice ROM. (CR5 - B6) • Set the external capacity. (CR5 - B5) • Set the NOP command. (CR5 - B1 = "0", B0 = "0") (2) • Set the start/stop address. (CR8 to CR12) (3) • Set the channel. (CR13 - B7 to B3) • Set the ADWT (address write) instruction. (CR13 - B1 = "0", B0 = "1") (4) • The start/stop address of the channel set by the ADWT instruction is stored in the channel index area. When status register BUSY (CR7 - B1) changes from "1" to "0", storage is complete. (5) • Start recording by setting the REC (recording) command (CR5 - B1 = "1", B0 = "0"). (6) • Check the recording start with the status register RPM bit (CR7 - B0 = "1"). (7) • To interrupt during recording, set the STOP (stop) command (CR5 - B1 = "1", B0 = "1"). In this case, to store the address counter contents in the channel index area as a new stop address, the following settings are required: • Set the channel. • Set the ADWT instruction. • When the BUSY bit changes from "1" to "0", settings are complete. (8) • When the address counter reaches the stop address, recording is complete. Check completion of recording with RPM bit = "0". Recording BUSY = 0? RPM = 0? N Basic setting Y (1) CR5 ST, SP address setting (2) CR8 to 12 Channel setting (ADWT) (3) CR13 BUSY = 0? N (4) CR7 REC (5) CR5 Recording start RPM = 1? N (6) CR7 Recording start check STOP RPM = 0? N Channel setting (ADWT) Y Y Y BUSY = 0? N RPM = 0? N (8) CR7 Recording completion check Y Y END (7) CR5 Recording stop CR13 CR7 Figure 18 Flow Chart of Recording |
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