msm7575 Oki Semiconductor, msm7575 Datasheet - Page 5

• Manufacturer Part Number: msm7575
• Description: Multi-function Pcm Codec
• Manufacturer: Oki Semiconductor

¡ Semiconductor
These are pins for outputs of the NOR gates whose inputs are the comparator output signal
between the SAO output level and the SG level, and each register signal stored by the MCU
interface.
The each output is NOR-gated with the comparator output and the invented signal of CR1-B7 at
TOUT3, the inverted signal of CR1-B6 at TOUT2, and the inverted signal of CR1-B5 at TOUT1.
non-inverting input of comparator1 and comparator2. REF1 is connected to an inverting input
of comparator1 and REF2 is connected to an inverting input of comparator2. The output of each
comparator is connected to the input of ENOR. The interval analog switch SW1 is ON/OFF
controlled by the output which is the logical OR of the ENOR and the CR5-B7 signal. When CR5-
B7 is at "0", the SW1 is turned to OFF if AVIN is within the voltage range of REF1 and REF2 and
the SW1 is turned to ON if AVIN is out of the voltage range of REF1 and REF2.
the connection.
These pins are for inputs and outputs of the internal analog switch. Refer to BLOCK DIAGRAM
and FUNCTIONAL DESCRIPTION for the connection and the control method.
Crystal oscillator connection pins. X2 is for the clock output pin. When a conventional external
clock is used, X1 should be connected to the ground, X2 should be left open, and the clock should
be input to the MCK pin.
TOUT1, TOUT2, TOUT3
AVIN, REF1, REF2
These pins are for inputs of two comparators internal to the device. AVIN is connected to each
AIN3+, AIN3-, GSX3, AIN4+, AIN4-, GSX4
These pins are for inputs and outputs of the internal op-amps. Refer to BLOCK DIAGRAM for
IO1 to IO14
X1, X2
For the use of a self-oscilation circut
Figure 2 Connection to a Crystal Oscillator or an External Clock
X1
9.6 MHz or
19.2 MHz
MSM7575
X2
MCK
For the use of an external clock
9.6 MHz or
19.2 MHz
X1
MSM7575
X2
MCK
MSM7575
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