AK7750 Datasheet, PDF (11/77 Pages) Asahi Kasei Microsystems – Audio DSP with Built-in Hands-Free Phone Features

[ASAHI KASEI]
[AK7750]
Pin Pin Name
NO.
32 RDY
(EESEL=”L”)
RDY/EESI
(EESEL=”H”)
33 XTO
34 XTI
35 DVSS
36 DVDD
37 RQ
38 SO
I/O
Function
Pin Classification
O Data Write Ready pin for µC Interface (Hi-Z)
µC
This pin becomes Hi-Z when CS =”H”.
O Data Write Ready pin for uC interface/
EEP/µC
EEPROM Serial Data Input Pin
Connect this pin to SI pin of AK6512C/14C.
When data read from EEPROM is complete (EEST changes
from “L” to “H”), this pin is automatically switched to the RDY
pin function.
O Oscillator Circuit Output pin
System Clock
When a quartz crystal oscillator is used, it is connected
between XTI pin and XTO pin.
When an external clock is used, keep this pin open.
I Oscillator Circuit Output pin
When a quartz crystal oscillator is used, it is connected
between XTI pin and XTO pin.
An external clock should be fed to this pin when no quartz
crystal oscillator is used.
- Digital Ground pin 0 V
Digital Power Supply
- Digital Power Supply pin 3.3 V (typ)
I Request N pin for µC Interface
µC
µC interface is enabled when RQ =”L”. Read operations
during RUN mode should be made when RQ =”H”.
RQ should be kept “H” during the reset operation and when
an external µC is not used.
O Serial Data Output pin for µC interface
µC
This pin becomes Hi-Z state at CS =”H” when EESEL is at “L”.
39 SI
40 SCLK
41 SMODE
42 CKSX
43 DVDD
44 DVSS
45 BVSS
I Serial Data Input/Serial Data Output Control pin for µC µC
interface
If no data is input to this pin or it is not used as Serial Data
Output Control pin, set SI at “L”.
I Serial Data Clock pin for µC interface
µC
If no clock is used, set SCLK at “H”.
I Slave / Master Mode Select pin
Control
SMODE=”L”: Slave mode
SMODE=”H”: Master mode
I Master Clock Select pin
CKSX=”H”:XTI, CKSX=”L”:BITCLK_I
For normal operation, CKSX is set to “H”.
- Digital Power Supply pin 3.3 V (typ)
Digital Power Supply
- Digital Ground pin 0 V
- Ground pin (silicon substrate potential)
Analog Power Supply
Tie this pin to AVSS.
[MS0296-E-00]
11
2005/03