PEB20534H-10 SIEMENS [Siemens Semiconductor Group], PEB20534H-10 Datasheet - Page 22

• Manufacturer Part Number: PEB20534H-10
• Description: DMA Supported Serial Communication Controller with 4 Channels DSCC4
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Semiconductor Group
• General
1.2
This chapter is useful for all being familiar with the SIEMENS ESCC family.
1.2.1
The DSCC4 SCC cores contain the core logic of the ESCC2 V3.2A as the heart of the
device. Some enhancements are incorporated in the SCCs. These are:
• Asynchronous PPP protocol support as in Internet RFC-1662
• Octet and Bit Synchronous PPP protocol support as in Internet RFC-1662
• 16-Kbyte packet length byte counter
• Enhanced address filtering (16-bit maskable)
• Enhanced time slot assigner
• Support of high data rates (45 Mbit/s for DS3 or 52 Mbit/s for OC1). Protocol support
1.2.2
The following features of the ESCC core have been removed:
• SDLC Loop mode
• Extended transparent mode 0
- On chip Rx and Tx data buffer; the buffer size is 128 32-bit words each.
- Programmable buffer size in transmit direction per channel; buffer allocation in
- Programmable watermark for each receive channel to control transfer of receive
- Two programmable watermarks for each transmit channel. One controlling data
- Internal test loop capability.
- JTAG boundary scan test according to IEEE 1149.1
- Advanced low-power CMOS technology
- TTL-compatible inputs/outputs
- P-FQFP-208-7 package
limited to HDLC Sub-modes without address recognition.
(this mode provided octet buffered data reception without usage of FIFOs; the DSCC4
supports octet buffered reception via appropriate threshold configurations for the SCC
receive FIFOs)
receive direction on request.
data to host memory.
loading from host memory and one controlling transfer of transmit data to the
corresponding Serial Communication Controller (SCC).
- 3.3-V & 5-V power supply
- 3.3-V interfaces (TTL levels; 5 V tolerant in 5 V environment)
Differences Between the DSCC4 and the ESCC Family
Enhancements to the ESCC Serial Core
Simplifications to the ESCC Serial Core
22
Data Sheet 09.98
PEB 20534
Overview