Page 1 of 4 IA6850 Advanced Information Sheet Asynchronous Communications Interface Adapter (ACIA) FEATURES • • • • • • Form, Fit, and Function Compatible with the Motorola MC6850 Packaging option available: 24 Pin Plastic DIP Programmable Word Length, Stop Bits, and Parity Error Detection Divide by 1, 16, or 64 operation TBD Equivalent gates. The IA6850 uses innovASIC’s innovative new f 3 Program to provide industry with parts that other vendors have declared obsolete. By specifying parts through this program a customer is assured of never having a component become obsolete again. This advanced information sheet assumes the original part has been designed in, and so provides a summary of capabilities only. For new designs contact innovASIC for more detailed information. Motorola is a copyright trademark of Motorola, Inc. Package Pinout VSS (1) RXDATA (2) RXCLK (3) TXCLK (24) CTS_n (23) DCD_n (22) D0 (4) (21) D1 RTS_n (5) (20) D2 TXDATA (6) (19) D3 IRQ_n (7) (18) D4 CS0 (8) (17) D5 CS2_n (9) (16) D6 CS1 (10) (15) D7 RS (11) (14) E VCC (12) (13) R/W_n IA6850 24 Pin DIP Copyright 1999, InnovASIC Inc. Customer Specific IC Solutions Page 2 of 4 IA6850 Advanced Information Sheet Asynchronous Communications Interface Adapter (ACIA) The IA6850 is an ACIA megafunction used to interface a microprocessor to a serial communications channel, and is functionally equivalent to the Motorola MC6850. This function receives and transmits data in a variety of configurations including 7 or 8 bit data words, odd, even, or nor parity, and 1 or 2 stop bits. A block diagram is shown in Figure 1. Functional Block Diagram Figure 1 TXCLK CLOCK GEN PARITY GEN R/W_n CS0 CS1 CS2_n RS CHIP SELECT AND READ/WRITE CONTROL TRANSMIT DATA REGISTER TRANSMIT SHIFT REGISTER TXDATA E CTS_n TRANSMIT CONTROL D0 STATUS REGISTER D1 IRQ_n INTERRUPT LOGIC D2 DCD_n D3 D4 DATA BUS BUFFERS RTS_n D5 D6 CONTROL REGISTER RECEIVE CONTROL PARITY CHECK D7 RECEIVE DATA REGISTER RXCLK RECEIVE SHIFT REGISTER CLOCK GEN Copyright 1999, InnovASIC Inc. Customer Specific IC Solutions RXDATA SYNC LOGIC Page 3 of 4 IA6850 Advanced Information Sheet Asynchronous Communications Interface Adapter (ACIA) Table 1 Part Number IA6850-PDW24C IA6850-PDW24I Qualification Levels Environmental/ Qual Level Commercial Industrial The following diagram depicts the innovASIC Product Identification Number. IAXXXXX-PPPPNNNT/SP Special Processing: S = Space Q = MIL-STD-883 Temperature: C = Commercial I = Industrial M = Military Number of Leads Package Type: Per Package Designator Table IC Base Number innovASIC Designator Copyright 1999, InnovASIC Inc. Customer Specific IC Solutions Page 4 of 4 IA6850 Advanced Information Sheet Asynchronous Communications Interface Adapter (ACIA) Package Designator Table Package Type innovASIC Designator Ceramic side brazed Dual In-line Cerdip with window Ceramic leaded chip carrier Cerdip without window Ceramic leadless chip carrier PLCC Plastic DIP standard (300 mil) Plastic DIP standard (600 mil) Plastic metric quad flat pack Plastic thin quad flat pack Skinny Cerdip Small outline plastic gull-wing(150 mil body) Small outline medium plastic gull-wing (207 mil body) Small outline narrow plastic gull wing (150 mil body) Small outline wide plastic gull wing (300 mil body) Skinny Plastic Dip Shrink small outline plastic (5.3mm .208 body) Thin shrink small outline plastic Small outline large plastic gull wing (330 mil body) Thin small outline plastic gull-wing (8 x 20mm) [TSOP] CDB CDW CLC CD CLL PLC PD PDW PQF PTQ CDS PSO PSM PSN PSW PDS PS PTS PSL PST PGA BGA CPGA CBGA Contact innovASIC for other package and processing options. Copyright 1999, InnovASIC Inc. Customer Specific IC Solutions