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Z89321 Datasheet(PDF) 7 Page - Zilog, Inc. |
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Z89321 Datasheet(HTML) 7 Page - Zilog, Inc. |
7 / 40 page Z89321/371/391 Zilog 16-Bit Digital Signal Processors DS97DSP0100 P R E L I M I N A R Y 7 1 Table 3. Z89321/371 44-Pin QFP Pin IdentiÞcation No. Symbol Function Direction 1-2 EXT3-EXT4 External data bus Input/Output 3VSS Ground 4-6 EXT5-EXT7 External data bus Input/Output 7 TXD Serial output to CODECs Output 8-9 EXT8-EXT9 External data bus Input/Output 10 VSS Ground 11-12 EXT10-EXT1 External data bus Input/Output 13 /INT2 Interrupt Input 14 /INT1 Interrupt Input 15 UI1 User input Input 16 UI0 User input Input 17 SCLK CODEC serial clock Input/Output* 18 VDD Power supply Input 19 RD//WR RD//WR strobe EXT bus Output 20 WAIT WAIT state Input 21 /RESET Reset Input 22-24 EA0-EA2 External address bus Output 25 VDD Power supply Input 26 /DS Data strobe for external bus Output 27 CLK Clock Input 28 HALT Stop execution Input 29 FS0 CODEC 0 frame sync Input/Output* 30 /INT0 Interrupt Input 31-32 UO0-UO1 User output Output 33 FS1 CODEC 1 frame sync Input/Output* 34 VSS Ground 35-37 EXT0-EXT2 External data bus Input/Output 38 VSS Ground 39 RXD Serial input to CODECs Input 40-42 EXT12-EXT14 External data bus Input/Output 43 VSS Ground 44 EXT15 External data bus Input/Output Note: *Input or output is defined by interface mode selection. |
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