mt9123apr1 Zarlink Semiconductor, mt9123apr1 Datasheet - Page 18

• Manufacturer Part Number: mt9123apr1
• Description: Dual Voice Echo Canceller Itu-t G165 Compliant
• Manufacturer: Zarlink Semiconductor

DATA 2
Receive
DATA 1
Transmit
DATA 1
SCLK
SCLK
CS
CS
Delays due to internal processor timing which are transparent to the MT9123.
The MT9123:
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:
Delays due to internal processor timing which are transparent to the MT9123.
The MT9123:
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
R/W
Figure 10 - Serial Microport Timing for Motorola Mode 00 or National Microwire
COMMAND/ADDRESS
A
R/W
0
latches receive data on the rising edge of SCLK
outputs transmit data on the falling edge of SCLK
latches receive data on the rising edge of SCLK
outputs transmit data on the falling edge of SCLK
A
COMMAND/ADDRESS
A
1
5
High Impedance
A
A
2
4
A
A
3
Figure 9 - Serial Microport Timing for Intel Mode 0
3
A
A
4
2
A
A
5
1
X
A
0
6 bits - Addressing Data
1 bit - Unused
1 bit - Read/Write
6 bits - Addressing Data
1 bit - Unused
X
Zarlink Semiconductor Inc.
D
0
MT9123
D
D
DATA INPUT/OUTPUT
1
D
7
7
D
DATA OUTPUT
18
D
D
2
DATA INPUT
6
6
D
D
D
3
5
5
D
D
D
4
4
4
D
D
5
D
3
3
D
D
6
D
2
2
D
D
D
7
1
1
D
D
0
0
Data Sheet