Rainbow Electronics DS21458 - Manual (Page 205)

DS21455/DS21458 Quad T1/E1/J1 Transceivers
205 of 270
Register Name:
ESIBCR1
Register Description: Extended System Information Bus Control Register 1
Register Address: B0h
Bit
# 7 6 5 4 3 2 1 0
Name — — — — ESIBSEL2 ESIBSEL1 ESIBSEL0 ESIEN
Default 0 0 0 0 0 0 0 0
Bit 0/Extended System Information Bus Enable (ESIEN).
0 = disabled
1 = enabled
Bits 1 to 3/Output Data Bus Line Select (ESIBSEL0 to ESIBSEL2). These bits tell the device which data bus bit to output
the ESIB data on when one of the ESIB information registers is accessed. Each member of the ESIB group must have a unique
bit selected.
ESIBSEL2 ESIBSEL1 ESIBSEL0 BUS BIT DRIVEN
0 0 0 AD0
0 0 1 AD1
0 1 0 AD2
0 1 1 AD3
1 0 0 AD4
1 0 1 AD5
1 1 0 AD6
1 1 1 AD7
Bit 4/Unused, must be set to zero for proper operation.
Bit 5/Unused, must be set to zero for proper operation.
Bit 6/Unused, must be set to zero for proper operation.
Bit 7/Unused, must be set to zero for proper operation.