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| Page 1 of 4 IA8237 Programmable DMA Controller FEATURES * * * * * Advanced Information Sheet Form, Fit, and Function Compatible with the Intel(R) 8237A and Harris(c) 82C37A Packaging options available: 40 Pin Plastic Dip or 44 Pin Plastic Leaded Chip Carrier Static Read/Write or Handshaking Modes Direct Bit Set/Reset Capability Memory-to-Memory Transfers The IA8237 uses innovASIC' innovative new f 3 Program to provide industry with parts that s 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. Intel is a registered trademark of Intel Corporation Harris is a copyright trademark of Harris Corporation Package Pinout MEMW_n READY A7 A6 A5 A4 (41) IOW_n MEMR_n MEMW_n N. C. READY HLDA ADSTB AEN HRQ CS_n CLK RESET DACK2 DACK3 DREQ3 DREQ2 DREQ1 DREQ0 VSS (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) (20) (39) (38) (37) (36) (35) (34) (33) (32) (31) (30) (29) (28) (27) (26) (25) (24) (23) (22) (21) A6 A5 A4 (44) (43) (42) EOP_n A3 A2 A1 A0 VCC DB0 DB1 DB2 DB3 DB4 DACK0 DACK1 DB5 DREQ3 DREQ2 DREQ1 DREQ0 DACK3 DACK1 DACK0 DB7 DB6 VSS DB5 DB6 DB7 N. C. N. C. HLDA ADSTB AEN HRQ CS_n CLK RESET DACK2 N. C. (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) (23) (24) (25) (26) (27) (28) (40) (39) (38) (6) (5) (4) (3) (2) (1) A3 A2 A1 A0 VCC DB0 DB1 DB2 DB3 DB4 N. C. IOR_n N. C. IA8237 40 Pin DIP EOP_n (37) (36) (35) (34) (33) (32) (31) (30) (29) IA8237 44 Pin LCC Copyright (c) 1999, InnovASIC Inc. Customer Specific IC Solutions IOW_n IOR_n (1) (40) A7 MEMR_n Page 2 of 4 IA8237 Programmable DMA Controller Advanced Information Sheet The IA8237 is a programmable direct memory access (DMA) mega-function designed to be functionally equivalent to the Intel 8237A and Harris 82C37A devices. The A8237 controls data transfers between memory and peripherals, memory-to-memory transfers, and block memory initialization. Four independently programmable channels are available, and requests may be generated via hardware or software. A block diagram is shown in Figure 1. Functional Block Diagram Figure 1 EOP_n RESET CS_n READY CLK AEN ADSTB MEMR_n MEMW_n IOR_n IOW_n BASE ADDRESS BASE WORD COUNT CURRENT ADDRESS CURRENT WORD COUNT COMMAND CONTROL TIMING AND CONTROL READ BUFFER 16 16 READ WRITE BUFFER A4 : A7 DECREMENTOR TEMP WORD COUNT REG INC/DECREMENTOR TEMP ADDRESS REG A0 : A3 IO BUFFER OUTPUT BUFFER WRITE BUFFER DREQ0_n : DREQ3_n COMMAND BUS HDLA HRQ_n DACK0 : DACK3 PRIORITY ENCODER AND ROTATING PRIORITY LOGIC READ BUFFER INTERNAL DATA IO BUFFER DB0 : DB7 MASK READ WRITE STATUS TEMPORARY REQUEST MODE Copyright (c) 1999, InnovASIC Inc. Customer Specific IC Solutions Page 3 of 4 IA8237 Programmable DMA Controller Table 1 Part Number IA8237-PDW40C IA8237-PLC44C IA8237-PDW40I IA8237-PLC44I Qualification Levels Environmental/ Qual Level Commercial Commercial Industrial Industrial Advanced Information Sheet 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 (c) 1999, InnovASIC Inc. Customer Specific IC Solutions Page 4 of 4 IA8237 Programmable DMA Controller Package Designator Table Package Type 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] PGA BGA Advanced Information Sheet innovASIC Designator CDB CDW CLC CD CLL PLC PD PDW PQF PTQ CDS PSO PSM PSN PSW PDS PS PTS PSL PST CPGA CBGA Contact innovASIC for other package and processing options. Copyright (c) 1999, InnovASIC Inc. Customer Specific IC Solutions |
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