msm7586-01 Oki Semiconductor, msm7586-01 Datasheet - Page 4

• Manufacturer Part Number: msm7586-01
• Description: Shift Qpsk Modem/adpcm Codec
• Manufacturer: Oki Semiconductor

¡ Semiconductor
MSM7586-01/03
PIN AND FUNCTIONAL DESCRIPTIONS
(Modem Unit)
TXD
Transmit data input for 384 kbps.
TXCI
Transmit clock input.
When the control register CRM0 - B6 is "0", a 384 kHz clock pulse synchronous with TXD should
be input to this pin. This clock pulse should be continuous because this device use APLL to
generate an internal clock pulse.
When CRM0 - B6 is "1", a 3.84 MHz clock pulse should be input to this pin. When the 3.84 MHz
clock pulse is applied to TXCL, TXCO outputs a 384 kHz clock pulse, which is generated by
dividing the TXCL input by 10. The transmit data, synchronous to the 384 kHz clock pulse,
should be input to the TXD. In this case the devices do not use APLL, and the 3.84 MHz clock pulse
need not be continuous. (Refer to Fig. 1.)
TXCO
Transmit clock output.
When CRM0 - B6 is "0", TXCO outputs the 384 kHz clock pulse (APLL output) for monitoring
purposes. When CRM0 - B6 is "1", this pin outputs a 384 kHz clock pulse generated by dividing
the TXCI input by 10. (Refer to Fig. 1.)
TXW
Transmit data window signal input.
The transmit timing signal for the burst data is input to this pin. If TXW is "1", the modulation
data is output. (Refer to Fig. 1)
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