SAB82520-N Datasheet | Siemens Semiconductor Group

High-Level Serial munications Controller (HSCC) 1 Features Two independent HDLC channels Implementation of X.25 LAPB/LAPD protocol Programmable timeout and retry conditions FIFO buffers for efficient transfer of data packets Digital phase-locked loop for each channel Baudrate generator and oscillator Different modes for clock recovery and data encoding High-speed data rate (up to 4 MHz) Supports bus configuration by collision resolution Tele-specific Features programmable 8-bit parallel µP interface Advanced CMOS technology Low power consumption; active: 25 m W at 4 MHz standby: 3 m W SAB 82520: operating temperature 0 to 70 ˚C SAF 82520: operating temperature - 40 to 85 ˚C SAB 82520 SAF 82520 P-LCC-28-R P-DIP-28 SAB 82520, a High-level Serial munications Controller (HSCC), has been designed to free the user from tasks occurring in munication via networks and trunk lines. SAB 82520 is an X.25 LAPB/LAPD controller which, to a large degree performs munications procedures independently of CPU support. A parallel processor bus constitutes the µC system. The munications interface is implemented by two full-duplex HDLC channels, which can be operated independently from one another. The HSCC is connected to the transmission line via additional line drivers or modems. External logic is cost-effective because clock recovery can be performed by an onchip oscillator, DPLL circuits and a programmable baudrate generator. Type SAB 82520-N SAB 82520-P SAF 82520-N SAF 82520-P Ordering Code Q67100-H8400 Q67100-H8014 Q67100-H8610 Q67100-H8512 Package P-LCC-28 (SMD) P-DIP-28 P-LCC-28 (SMD) P-DIP-28 Semiconductor Group SAB 82520 SAF 82520 Figure 1 Logic Symbol Semiconductor Group SAB 82520 SAF 82520 Pin Configurations (top view) P-DIP P-LCC Figure 2 Semiconductor Group 7 SAB 82520 SAF 82520 1.1 Pin Definitions and Functions Pin No. Symbol 25 26 27 28 1 2 3 4 5 12 AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 RTSA RTSB Input (I) Output (O) I/O I/O I/O I/O...