am79q02 ETC-unknow, am79q02 Datasheet - Page 42

• Manufacturer Part Number: am79q02
• Description: Quad Subscriber Line Audio-processing Circuit Qslac Devices
• Manufacturer: ETC-unknow

14, 15. Write/Read Channel Enable and Operating Mode Register
42
(4A/4B)
R/W = 0: Write
R/W = 1: Read
Master Clock Frequency
These commands do not depend on the state of the Channel Enable Register.
* Power Up and Hardware Reset (
RSVD
Robbed-bit Mode
VOUT Mode
Low Power Mode
Channel Enable 4
Channel Enable 3
Channel Enable 2
Channel Enable 1
* Power Up and Hardware Reset (
Command
I/O Data
CSEL = 0000
CSEL = 0001
CSEL = 0010
CSEL = 0011
CSEL = 01xx
CSEL = 10xx
CSEL = 11xx
CSEL = 1010*
Reserved for future use. Always write as 0, but 0 is not guaranteed when read.
RBE = 0*
RBE = 1
VMODE = 0*
VMODE = 1
LPM = 0*
LPM = 1
EC4 = 0
EC4 = 1*
EC3 = 0
EC3 = 1*
EC2 = 0
EC2 = 1*
EC1 = 0
EC1 = 1*
Am79Q02/021/031 Data Sheet
1.536 MHz
1.544 MHz
2.048 MHz
Reserved
Two times frequency specified above (2 x 1.536 MHz,
2 x 1.544 MHz, or 2 x 2.048 MHz)
Four times frequency specified above (4 x 1.536 MHz,
4 x 1.544 MHz, or 4 x 2.048 MHz)
Reserved
8.192 MHz is the default
Robbed-bit Signaling mode is disabled.
Robbed-bit Signaling mode is enabled on PCM receiver if µ -law is
selected.
VOUT = VREF through a resistor when channel is deactivated
VOUT high impedance when channel is deactivated.
Low Power mode off
Low Power mode on while all channels are inactive
Disabled, Channel 4 cannot receive commands
Enabled, Channel 4 can receive commands
Disabled, Channel 3 cannot receive commands
Enabled, Channel 3 can receive commands
Disabled, Channel 2 cannot receive commands
Enabled, Channel 2 can receive commands
Disabled, Channel 1 cannot receive commands
Enabled, Channel 1 can receive commands
RSVD
D
0
7
RST
RST
RBE
) Value = 9Ah.
) Value = 0Fh.
D
1
6
VMODE
D
0
5
LPM
D
0
4
EC4
D
1
3
EC3
D
0
2
MPI Command
EC2
D
1
1
R/W
EC1
D
0