z86e21 ZiLOG Semiconductor, z86e21 Datasheet
z86e21
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z86e21 Summary of contents
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... M ICROCONTROLLER The device applications demand powerful I/O capabilities. The Z86E21 fulfills this with 32-pin dedicated to input and output. These lines are grouped into four ports. Each port consists of eight lines, and is configurable under software control to provide timing, status signals, serial or parallel I/O with or without handshake, and an address/data bus for interfacing external memory ...
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GENERAL DESCRIPTION (Continued) Output Input Port 3 UART Counter/ Timers (2) Interrupt Control Port 2 I/O (Bit Programmable) 2 Vcc GND XTAL /AS /DS R//W /RESET Machine Timing and Instruction Control ALU FLAGS Register Pointer Register File 256 x 8-Bit ...
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... XTAL2 2 39 P31 3 38 XTAL1 P27 P37 4 37 P26 36 P30 5 P25 /RESET 6 35 P24 34 R//W 7 P23 / P22 32 /AS 9 P21 Z86E21 P35 10 31 P20 DIP 30 GND 11 P33 P32 12 29 P34 28 P00 13 P17 P01 14 27 P16 26 P02 15 P15 P03 16 25 P14 24 P04 ...
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... Port 3 pin 5 12 GND Ground, GND 13 P32 Port 3 pin Z86E21 12 PLCC 44-Lead PLCC Pin Assignments 44-Lead PLCC Pin Identification Direction Pin # Symbol Input 14-16 P00-P02 Output 17 ...
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... Port 3 pin 1 27 P36 Port 3 pin 6 28 GND Ground, GND 29 V Power Supply CC 30 XTAL2 Crystal, Oscillator Clock Z86E21 39 QFP 44-Lead QFP Pin Assignments 44-Lead QFP Pin Identification ...
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ABSOLUTE MAXIMUM RATINGS Symbol Description V Supply Voltage Storage Temp STG T Oper Ambient Temp A Notes: * Voltages on all pins with respect to GND. 13.0 V Maximum on P30-P33. † See Ordering Information STANDARD TEST CONDITIONS ...
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DC CHARACTERISTICS Sym. Parameter Min Max Input Voltage Max Input Voltage V Clock Input High Voltage 3 Clock Input Low Voltage -0. Input High Voltage 2 Input Low Voltage -0 Output High ...
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AC CHARACTERISTICS External I/O or Memory Read or Write Timing Diagram R//W 12 Port 0, /DM 19 Port 1 1 /AS 4 /DS (Read) Port 1 /DS (Write ...
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AC CHARACTERISTICS External I/O or Memory Read and Write Timing Table No Symbol Parameter 1 TdA(AS) Address Valid to /AS Rise Delay 2 TdAS(A) /AS Rise to Address Float Delay 3 TdAS(DR) /AS Rise to Read Data Req’d Valid 4 ...
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AC CHARACTERISTICS Additional Timing Diagram Clock T IN IRQ N AC CHARACTERISTICS Additional Timing Table No Symbol Parameter 1 TpC Input Clock Period 2 TrC,TfC Clock Input Rise & Fall Times 3 TwC Input Clock Width 4 TwTinL Timer Input ...
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AC CHARACTERISTICS Handshake Timing Diagrams Data In 1 /DAV (Input) RDY (Output) Data Out 7 /DAV (Output) RDY (Input) Data In Valid 2 3 Delayed DAV 4 Input Handshake Timing Data Out Valid Output Handshake Timing Next ...
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AC CHARACTERISTICS Handshake Timing Table No Symbol Parameter 1 TsDI(DAV) Data In Setup Time 2 ThDI(DAV) Data In Hold Time 3 TwDAV Data Available Width 4 TdDAVI(RDY) DAV Fall to RDY Fall Delay 5 TdDAVId(RDY) DAV Rise to RDY Rise ...