AK2548 Datasheet, PDF (7/30 Pages) Asahi Kasei Microsystems – 7 channel E1 Transceiver

ASAHI KASEI
[AK2548]
PIN FUNCTION
Pin Name I/O
Function
Comment
E1 Transceiver
TTIP1-7
O
TRING1-7 O
TPOS1-7
I
TNEG1-7
I
TCLK1-7
I
RTIP1-7
I
RRING1-7 I
RPOS1-7
O
RNEG1-7 O
RCLK1-7
O
LOS1-7
O
TVDD1-7
TVSS1-7
AVSS1-8
Transmit Tip/Ring Output
Bipolar output over transmit transformer
Transmit Positive/Negative Data Input
Input on the falling edge of TCLK
Transmit Clock Input
Receive Tip/Ring Input
Bipolar Input over receive transformer
Receive Positive/Negative Data Output
Output on the falling edge of RCLK
Receive Clock Output recovered from receive data input
Loss of signal output
Output “high” when detect loss of signal
LOSx output is not masked by MLOSx register.
Positive Power Supply for the Transmit Driver
Negative Power Supply for the Transmit Driver
Analog ground .
Common Block
MCLK
I
AS(ALE)
I
INT
O
DS(RD)
I
R/W (WR) I
CS
I
BTS
I
SCLK
I
SDI
I
SDO
O
AD0-AD7 I/O
2.048/32.768MHz External Reference Clock Input
Address Select(Address Latch Enable) Input
Interrupt Output(PMOS open drain, should be tied to GND through
a resistor), Active High, INT output goes “high” when the alarm is
reported to any one of LOSx, LOTCx or LOMC registers. This pin can
be masked by MLOSx, MLOTCx or MLOMC registers.
Data Strobe(Read Enable) Input
Read/Write(Write Enable) Input
Chip Select Input
Bus Type Select Input
BTS=“H” : Motorola Mode
BTS=“L” : Intel Mode
Serial Clock Input
Serial Data Input
Serial Data Output
Address/Data Input/Output
Used for read/write internal registers.
C0028-E-00
7
1999/9