Z89340 Datasheet, PDF (13/30 Pages) Zilog, Inc. – Digital Wavetable Engine

Z89340
Digital Wavetable Engine
PIN FUNCTIONS (Continued)
ISA_MEMW (I/O). ISA Memory Write.
ISA_SA_0–4 (I/O). ISA Address Bus.
ISA_SD_08–15 (I/O). Data Bus. This data bus is used to
transfer data between PC and the Z89340. The lines map
directly to the PC data bus; the pins should be connected
to the ISA bus address lines of the same name.
MIDI_RX (Input). Receives data from MIDI interface.
MIDI_TX (Output). Sends data to MIDI interface.
MODE_S0–3 (Input). Mode Selection pins that are general
purpose input pins.
DRAM_OE (Output). External DRAM Output Enable. This
signal is an output enable strobe for external DRAM.
DRAM_WE (Output). External DRAM Write Enable. This
signal is a write enable strobe for external DRAM.
RAS (Output). Row Address Strobe Output. This memory
address strobe is used in conjunction with the address
lines ROMADD01–R0MADD23.
RESET. (Input). Device Reset.
ROMADD01–ROMADD23 (Output). Wavetable ROM Ad-
dress Bus. These lines are used to address external sam-
ple memory.
V_CC. Power supply that connects to 5V ±5%.
Wave_Data_0E (Output). External Memory Output En-
able. This signal is an output enable strobe for external
sample memory.
Wave_Data_00-15 (I/O). Waveform Memory
DRAM/SRAM/ROM Data Bus. These lines are used to
pass sample data between the Z89340 and external sam-
ple memory.
1-13
PRELIMINARY
DS96DSP0201