Z85C3008PEG Datasheet, PDF (10/81 Pages) Zilog, Inc. – CMOS SCC Serial Communications Controller

CMOS SCC Serial Communications Controller
Product Specification
2
• New programmable WR7 (Write register 7 prime) to enable new features
• Improvements to support SDLC mode of synchronous communication:
– Improve functionality to ease sending back-to-back frames
– Automatic SDLC opening Flag transmission
– Automatic Tx Underrun/EOM Latch reset in SDLC mode
– Automatic RTS deactivation
– TxD pin forced High in SDLC NRZI mode after closing flag
– Complete CRC reception
– Improved response to Abort sequence in status FIFO
– Automatic Tx CRC generator preset/reset
– Extended Read for Write registers
– Write data set-up timing improvement
• Improved AC timing:
– 3 to 3.6 PCLK access recovery time
– Programmable DTR/REQ timing
– Write data to falling edge of WR setup time requirement is now eliminated
– Reduced INT timing
• Other features include:
– Extended Read function to read back the written value to the Write registers
– Latching RRO during read
– RRO, bit D7 and RR10, bit D6 now has reset default value
PS011706-0511
Overview