AMD Elan SC520 - Figure 1-5 Élansc520 Microcontroller-Based Telephone Line Concentrator

Architectural Overview
Élan™SC520 Microcontroller User’s Manual 1-13
Figure 1-5 Élan™SC520 Microcontroller-Based Telephone Line Concentrator Reference Design
Élan™SC520 Microcontroller
GP Bus
SDRAM Bus
HDLC
PCM Highway
T1 or E1
(6x to 10X)
32-kHz Crystal
33-MHz Crystal
MA12–MA0
MD31–MD0
Control
SDRAM
Control
Flash
Control
Memory
ISLIC
Am79R241
Quad ISLAC Am79Q2241
ISLIC
Am79R241
ISLIC
Am79R241
ISLIC
Am79R241
ISLIC
Am79R241
Quad ISLAC Am79Q2241
ISLIC
Am79R241
ISLIC
Am79R241
ISLIC
Am79R241
T1/E1
Interface
SSI
Analog Phone Lines
GPD15–GPD0
GPA25–GPA0