MT9122AE Zarlink Semiconductor, MT9122AE Datasheet - Page 15

• Manufacturer Part Number: MT9122AE
• Description: Description = Dual Voice Echo CANceller ( Itu-t G165 Compliant) With Disable Tone Detection ;; Package Type = Pdip ;; No. Of Pins = 28
• Manufacturer: Zarlink Semiconductor

Data Sheet
Note that the two ports are independent so that, for example, PORT1 can operate with 8 bit enable strobes and PORT2
can operate with 16 bit enable strobes.
➀
➁
➂
➃
➄
DATA 1
SCLK
CS
BCLK
PORT1
ENA1
ENB1
Rin
Sout
PORT2
ENA2
ENB2
Sin
Rout
Delays due to internal processor timing which are transparent to the MT9122.
The MT9122:
The falling edge of CS indicates that a COMMAND/ADDRESS byte will be transmitted from the microprocessor. The subsequent
byte is always data followed by CS returning high.
A new COMMAND/ADDRESS byte may be loaded only by CS cycling high then low again.
The COMMAND/ADDRESS byte contains:
➁
➂
R/W
COMMAND/ADDRESS
A
0
outputs=High impedance
inputs = don’t care
latches receive data on the rising edge of SCLK
outputs transmit data on the falling edge of SCLK
A
1
A
2
Figure 10 - Serial Microport Timing for Intel Mode 0
A
3
A
4
A
5
➄
X
1 bit - Read/Write
6 bits - Addressing Data
1 bit - Unused
Figure 9 - SSI Operation
➀
D
0
D
DATA INPUT/OUTPUT
1
8 or 16 bits
8 or 16 bits
8 or 16 bits
8 or 16 bits
D
ECA
ECA
2
D
3
D
4
D
5
D
6
8 or 16 bits
8 or 16 bits
8 or 16 bits
8 or 16 bits
D
7
ECB
ECB
➃
MT9122
15