CS8416-IS Cirrus Logic, CS8416-IS Datasheet - Page 21

• Manufacturer Part Number: CS8416-IS
• Description: 192 kHZ DIGITAL AUDIO INTERFACE RECEIVER
• Manufacturer: Cirrus Logic

read/write bit (R/W) high. The next falling edge of
CCLK will clock out the MSB of the addressed
register (CDOUT will leave the high impedance
state). If the MAP auto increment bit is set to 1, the
data for successive registers will appear consecu-
tively.
The auto increment function is strictly linear. This
may result in operations on undefined registers.
Reads from undefined registers will produce inde-
terminate results. Writing to undefined registers
will be ignored.
6.2
In I
is clocked into and out of the part by the clock,
SCL, with the clock to data relationship as shown
in
CS8416 is given a unique address. Pins AD0 and
AD1 form the two least significant bits of the chip
address and should be connected to VL+ or DGND
DS578PP2
Figure
2
C mode, SDA is a bidirectional data line. Data
I
2
C Mode
12. There is no CS pin. Each individual
Notes: 1. AD2 is derived from a resistor attached to the
2. If operation is a write, this byte contains the Memory Address Pointer, MAP.
3. If operation is a read, the last bit of the read should be NACK (high).
SDA
SCL
AD1 and AD0 are determined by the state of the corresponding pins.
Start
0010
Figure 12. Control Port Timing in I
AD2-0
Note 1
R/W
ACK DATA7-0 ACK DATA7-0 ACK
as desired. The GPO2 pin is used to set the AD2 bit
by connecting a 47K resistor from the GPO2 pin to
VL+ or to DGND. The state of the pin is sensed
while the CS8416 is being reset. The upper 4 bits of
the 7-bit address field are fixed at 0010. To com-
municate with a CS8416, the chip address field,
which is the first byte sent to the CS8416, should
match 0010 followed by the settings of the GPO2,
AD1, and AD0. The eighth bit of the address is the
R/W bit. If the operation is a write, the next byte is
the Memory Address Pointer (MAP) which selects
the register to be read or written. If the operation is
a read, the contents of the register pointed to by the
MAP will be output. Setting the auto increment bit
in MAP allows successive reads or writes of con-
secutive registers. Each byte is separated by an ac-
knowledge bit. The ACK bit is output from the
CS8416 after each input byte is read, and is input to
the CS8416 from the microcontroller after each
transmitted byte.
Note 2
2
C Mode
GPO2
pin.
Note 3
Stop
CS8416
21