z87010 ZiLOG Semiconductor, z87010 Datasheet - Page 16

• Manufacturer Part Number: z87010
• Description: Audio Encoder/decoders
• Manufacturer: ZiLOG Semiconductor

Z87010/Z87L10
Audio Encoder/Decoders
CODEC INTERFACE
The CODEC interface provides direct-connect capabilities
for standard 8-bit PCM CODECs with hardware
compression. Internal registers EXT5, EXT6 and EXT7 are
used to program the CODEC mode. One serial clock and
CODEC Interface Hardware
The Hardware for the CODEC Interface uses six 16-bit
registers, -law compression logic and general-purpose
logic to control transfers to the appropriate register.
2-16
TXD
CLKIN
EXT5-2
EXT5-1
16
16
CLKIN
CLKIN
Figure 9. CODEC Interface Block Diagram
CONTROL
LOGIC
P R E L I M I N A R Y
-law
Data Bus
CLKIN
CLKIN
EXT6-1
EXT6-2
two frame sync control signals are provided, allowing for
two bidirectional data channels.
Note: -law expansion must be done in software.
CODEC Interface Control Signals
SCLK (Serial Clock)
The Serial Clock provides a clock signal for operating the
external CODEC. A 4-bit prescaler is used to determine
the frequency of the output signal.
SCLK = (0.5* CLK)/PS where: CLK = System Clock
Note: An internal divide-by-two is performed before the
clock signal is passed to the Serial Clock prescaler.
* The Prescaler is an up-counter.
16
16
RXD
16
Compression
-Law
16
16
PS = 4-bit Prescaler*
EXT7-2
EXT7-1
DS96WRL0601
Zilog