MT9122 Zarlink Semiconductor, MT9122 Datasheet - Page 16

• Manufacturer Part Number: MT9122
• Description: Dual Voice Echo CANceller (ITU-T G165 Compliant) With Disable Tone Detection
• Manufacturer: Zarlink Semiconductor

MT9122
16
DATA 2
Receive
DATA 1
Transmit
➀
➁
➂
➃
➄
SCLK
CS
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: 1 bit - Read/Write
➁
Figure 11 - Serial Microport Timing for Motorola Mode 00 or National Microwire
R/W
➂
latches receive data on the rising edge of SCLK
outputs transmit data on the falling edge of SCLK
COMMAND/ADDRESS
A
5
High Impedance
A
4
A
3
A
2
A
1
A
0
➄
6 bits - Addressing Data
1 bit - Unused
X
➀
D
D
7
7
DATA OUTPUT
D
D
DATA INPUT
6
6
D
D
5
5
D
D
4
4
D
D
3
3
D
D
2
2
D
D
1
1
D
D
0
0
➃
Data Sheet