Z8523316VSC00TR

Z85233 CPS DC-4058-03 CUSTOMER PROCUREMENT SPECIFICATION Z85233 EMSCC™ ENHANCED MONO SERIAL COMMUNICATION CONTROLLER GENERAL DESCRIPTION The Zilog Enhanced Mono Serial Communication Controller, Z85233 EMSCC, is a software compatible CMOS member of the SCC family introduced by Zilog in 1981. The EMSCC is a full-duplex data communications controller capable of supporting a wide range of popular protocols. The Z85233 EMSCC is a single channel version (Channel A) of Zilog's Z85230 ESCC. Based on ZIlog's unique Superintegration™ Technology, the EMSCC is compatible with designs using Zilog's SCC and ESCC to receive and transmit data. It has many improvements that significantly reduce CPU overhead. The addition of a 4-byte transmit FIFO and an 8-byte receive FIFO significantly reduces the overhead required to provide data to, and get data from, the transmitter and receiver. The EMSCC also has many features that improve packet handling in SDLC mode. The EMSCC will automatically: transmit a flag before the data, reset the Tx Underrun/EOM latch, force the TxD pin high at the appropriate time when using NRZI encoding, deassert the /RTS pin after the closing flag, and better handle ABORTed frames when using the 10x19 status FIFO. The combination of these features along with the deeper data FIFOs significantly simplifies SDLC driver software. DC 4058-03 (11-4-94) The CPU hardware interface has been simplified by relieving the databus setup time requirement and supporting the software generation of the interrupt acknowledge signal (/INTACK). These changes allow an interface with less external logic to many microprocessor families while maintaining compatibility with existing designs. I/O handling of the EMSCC is improved over the SCC with faster response of the /INT and /DTR//REQ pins. The many enhancements added to the EMSCC permits a system design that increases overall system performance with better data handling and less interface logic. Notes: All Signals with a preceding front slash, "/", are active Low, e.g.: B//W (WORD is active Low); /B/W (BYTE is active Low, only). Power connections follow conventional descriptions below: Connection Circuit Device Power Ground VCC GND VDD VSS 1 Z85233 CPS DC-4058-03 /WR /RD D6 D4 D2 D0 D1 D3 D5 D7 /INT PIN DESCRIPTIONS 33 32 31 30 29 28 27 26 25 24 23 IEO 34 22 NC IEI 35 21 /CE /INTACK 36 20 D//C VCC 37 19 NC /W//REQA 38 18 GND /SYNCA 39 17 NC /RTxCA 40 16 NC 41 15 NC /TRxCA 42 14 NC TxDA 43 13 NC 12 NC 2 3 4 5 6 7 8 9 10 11 /CTSA /DCDA PCLK NC NC NC NC Z85233 PQFP Pin Assignments 2 NC 1 /RTSA 44 /DTR/REQA GND GND RxDA Z85233 (Top View) D3 D1 D0 D2 4 3 2 1 44 43 42 41 40 /RD D5 5 D6 D7 6 D4 /INT /WR Z85233 CPS DC-4058-03 IEO 7 39 NC IEI 8 38 /CE /INTACK 9 37 D//C 10 36 NC 35 GND 34 NC VCC /W//REQA 11 Z85233 (Top View) /SYNCA 12 /RTxCA 13 33 NC 14 32 NC 15 31 NC TxDA 16 30 NC GND 17 29 NC NC NC NC NC NC PCLK /DCDA /CTSA /RTSA 18 19 20 21 22 23 24 25 26 27 28 /DTR//REQA /TRxCA GND RxDA Z85233 PLCC Pin Assignments 3 Z85233 CPS DC-4058-03 ABSOLUTE MAXIMUM RATINGS VCC Supply Voltage range ......................... -0.3V to +7.0V Voltages on all pins with respect to GND .......................... -0.3V to VCC +0.3V Operating Ambient Temperature ............................ See Ordering Information Storage Temperature ............................ -65°C to +150°C Stresses greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; operation of the device at any condition above those indicated in the operational sections of these specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. STANDARD TEST CONDITIONS The DC Characteristics and capacitance sections below apply for the following standard test conditions, unless otherwise noted. All voltages are referenced to GND. Positive current flows into the referenced pin. Standard conditions are as follows: ■ ■ ■ +4.50 V ≤ VCC ≤ + 5.50 V GND = 0 V TA as specified in Ordering Information +5V +5V 2.1 kΩ 2.2 kΩ From Output Under Test From Output 100 pF 250 µA 50 pF Standard Test Load Open-Drain Test Load CAPACITANCE Symbol Parameter CIN COUT CI/O Input Capacitance Output Capacitance Bidirectional Capacitance Note: f = 1 MHz, over specified temperature range. MISCELLANEOUS Gate Count - 7000 4 Min Max Unit 10 15 20 pF pF pF Test Condition Unmeasured pins returned to ground. Z85233 CPS DC-4058-03 DC CHARACTERISTICS Z85233 Symbol Parameter VIH VIL VOH1 VOH2 VOL Input High Voltage Input Low Voltage Output High Voltage Output High Voltage Output Low Voltage IIL IOL ICC1 Input Leakage Output Leakage VCC Supply Current ICC(OSC) Crystal OSC Current Min Typ 2.2 -0.3 2.4 VCC-0.8 4 5 Max Unit VCC+0.3 0.8 0.4 V V V V V ±10.0 ±10.0 8 (10 MHz) 10 (16 MHz) µA µA mA mA 0.4< VIN