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Z86L7208VSC Datasheet(PDF) 2 Page - Zilog, Inc. |
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Z86L7208VSC Datasheet(HTML) 2 Page - Zilog, Inc. |
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2 / 71 page  Z86C72/C92/L72/L92 IR Microcontroller Zilog 6-2 P R E L I M I N A R Y DS97LVO0900 GENERAL DESCRIPTION (Continued) access to register mapped peripherals, I/O circuits, and powerful counter/timer circuitry. The Z86C72/C92/L72/L92 offers a flexible I/O scheme, an efficient register and ad- dress space structure, and a number of ancillary features that are useful in many consumer, automotive, computer peripheral, and battery operated hand-held applications. Many applications demand powerful I/O capabilities. The Z86LX2/CX2 family fulfills this with three package options in which the L72 version provides 31 pins of dedicated in- put and output. These lines are grouped into four ports. Each port consists of eight lines (Port 3 has seven lines) and is configurable under software control to provide tim- ing, status signals, parallel I/O with or without handshake, and an address/data bus for interfacing external memory. There are five basic address spaces available to support a wide range of configurations: Program Memory, Register File, Expanded Register File, Extended Data RAM and Ex- ternal Memory. The register file is composed of 256 bytes of RAM. It includes four I/O port registers, 16 control and status registers and the rest are General-Purpose regis- ters. The Extended Data RAM adds 512 bytes of usable general-purpose registers. The Expanded Register FIle consists of two additional register groups (F and D). To unburden the program from coping with such real-time problems as generating complex waveforms or receiving and demodulating complex waveform/pulses, the Z86LX2/CX2 family offers a new intelligent counter/timer architecture with 8-bit and 16-bit counter/timers (Figure 1). Also included are a large number of user-selectable modes, and two on-board comparators to process analog signals with separate reference voltages (Figure 2). Figure 1. Counter/Timer Block Diagram HI16 LO16 16-Bit T16 TC16H TC16L HI8 LO8 And/Or Logic Clock Divider Glitch Filter Edge Detect Circuit 8-Bit T8 TC8H TC8L 8 8 16 8 Input SCLK 1 2 48 Timer 16 Timer 8/16 Timer 8 8 8 8 8 8 |
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