Hitachi HD68230
The HD68230 Parallel Interface/Timer provides versatile double buffered parallel interfaces and an operating system oriented timer to HD68000 systems. The parallel interfaces operate in unidirectional or bidirectional modes, either 8 or 16 bits wide. These programmable handshake pins provide an interface flexible enough for connection to a wide variety of low, medium, or high speed peripherals or other computer systems.FEATURES
● HD68000 Bus Compatible● Port Modes Include: Bit I/O Unidirectional 8-Bit and 16-Bit Bidirectional 8-Bit and 16-Bit
● Selectable Handshaking Options
● 24-Bit Programmable Timer
● Software Programmable Timer Modes
● Contains Interrupt Vector Generation Logic
● Separate Port and Timer Interrupt Service Requests
● Registers are ReadIWrite and Directly Addressable
● Registers are Addressed for MOVEP (Move Peripheral) and DMAC Compatibility
● TYPE OF PRODUCTS Type No. HD68230P-8 HD68230P-l0 Bus Timing 8 MHz 10 MHz -PRELIMINARY- HD68230P8 HD68230Pl0 (DP-48)
● PIN ARRANGMENT Os , 06 2 07 3 PAo 4 PAl 5 PA2 6 PA3 7 PA4 8 PAs 9 PA6' PBa 1 PS, , PB2 1 PB3 04 03 02 D, Do R/Vii iJ'fAC"i( 'CS eLK REm Vss pcdnAa< PCe/PiAC'K PC5/~ PC4/DMAREn pel/TOUT Pe2/TIN 31 PC, pea AS1 RS2 'R53 R54 (Top View) ~HITACHI Hitachi America Ltd.● 2210 O'Toole Avenue
● San Jose, CA 95131
● (408) 435-8300 273 HD68230--------------------------------------------------------------
● PIIT SYSTEM BLOCK DIAGRAM -0'5 H...