MT9315 Zarlink Semiconductor, MT9315 Datasheet - Page 12

• Manufacturer Part Number: MT9315
• Description: Acoustic Echo CANceller
• Manufacturer: Zarlink Semiconductor

Advance Information
The MT9315:
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
This delay is due to internal processor timing and is equal to Tsch time. The delay is transparent to MT9315.
DATA 2
Receive
DATA 1
Transmit
SCLK
CS
Figure 9 - Serial Microport Timing for Motorola Mode 00 or National Microwire
latches receive data on the rising edge of SCLK
outputs transmit data on the falling edge of SCLK
R/W
COMMAND/ADDRESS
A
5
High Impedance
A
4
A
3
A
6 bits - Addressing Data
1 bit - Unused
2
A
1
A
0
X
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
MT9315
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