DS21Q55N Maxim Integrated Products, DS21Q55N Datasheet - Page 102

• Manufacturer Part Number: DS21Q55N
• Description: Framer E1/J1/T1 3.3V 256-Pin BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55N

• Package: 256BGA
• Number Of Transceivers: 4
• Standard Framing Format: E1|J1|T1
• Maximum Supply Current: 75(Typ) mA
• Minimum Single Supply Voltage: 3.135 V
• Maximum Single Supply Voltage: 3.465 V

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 5/Channel Pointer Address Bits (IAA0 to IAA5). These bits select the channel to be programmed with
the idle code defined in the PCICR register. IAA0 is the LSB of the 5-bit channel code. Channel 1 is 01h.
Bit 6/Global Transmit-Idle Code (GTIC). Setting this bit causes all transmit channels to be set to the idle code
written to the PCICR register. This bit must be set = 0 for read operations. The value in bits IAA0–IAA5 must be a
valid transmit channel (01h to 20h for E1 mode; 01h to 18h for T1 mode).
Bit 7/Global Receive-Idle Code (GRIC). Setting this bit causes all receive channels to be set to the idle code
written to the PCICR register. This bit must be set = 0 for read operations. The value in bits IAA0–IAA5 must be a
valid transmit channel (01h to 20h for E1 mode; 01h to 18h for T1 mode).
Table 15-B. GRIC and GTIC Functions
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 7/Per-Channel Idle-Code Bits (C0 to C7). This register defines the idle code to be programmed in the
channel selected by the IAAR register. C0 is the LSB of the idle code (this bit is transmitted last).
GRIC
0
0
1
1
GTIC
GRIC
0
1
0
1
C7
7
0
7
0
Updates a single transmit or receive channel
Updates all transmit channels
Updates all receive channels
Updates all transmit and receive channels
GTIC
C6
IAAR
Idle Array Address Register
7Eh
PCICR
Per-Channel Idle Code Register
7Fh
6
0
6
0
IAA5
C5
5
0
5
0
FUNCTION
IAA4
C4
4
0
4
0
102 of 237
IAA3
C3
0
0
3
3
IAA2
C2
2
0
2
0
IAA1
C1
1
0
1
0
IAA0
C0
0
0
0
0