XRT79L71_07 Datasheet, PDF (8/109 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - HARDWARE

XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - HARDWARE
REV. 1.0.0
1.0 REGISTER MAP/DESCRIPTION OF THE XRT79L71 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-
CHANNEL FRAMER WITH LIU IC (SEE 79L71-REGISTER/MAP-DESC.PDF)
2.0 PIN DESCRIPTIONS
PIN DESCRIPTIONS
PIN #
NAME
TYPE
DESCRIPTION
MICROPROCESSOR INTERFACE
F16
A0
I Address Bus Input pins Microprocessor Interface:
F15
A1
F14
A2
F13
A3
These pins permit the Microprocessor to identify on-chip registers and Buffer/Mem-
ory locations within the XRT79L71 whenever it performs READ and WRITE opera-
tions with the XRT79L71.
G16
A4
G15
A5
G14
A6
G13
A7
C16
A8
D15
A9
D16
A10
E16
A11
E15
A12
E14
A13
E13
A14
D11
D0
I/O Bi-Directional Data Bus pins Microprocessor Interface:
C12
D1
B13
D2
A14
D3
These pins are used to drive and receive data over the bi-directional data bus, when-
ever the Microprocessor performs READ or WRITE operations with the Microproces-
sor Interface of the XRT79L71.
D12
D4
C13
D5
B14
D6
A15
D7
5