MT9123AE Zarlink Semiconductor, MT9123AE Datasheet - Page 16

• Manufacturer Part Number: MT9123AE
• Description: Description = Dual Voice Echo CANceller ( Itu-t G165 Compliant) ;; Package Type = Pdip ;; No. Of Pins = 28
• Manufacturer: Zarlink Semiconductor

MT9123
16
DATA 2
Receive
DATA 1
Transmit
SCLK
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: 1 bit - Read/Write
Figure 11 - Serial Microport Timing for Motorola Mode 00 or National Microwire
R/W
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
6 bits - Addressing Data
1 bit - Unused
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
Data Sheet