Z86L87

` Low Power Consumption - 40 mW (Typical)
 
` Three Standby Modes
    STOP
    HALT
    Low Voltage
 
` Special Architecture to Automate Both Generation and Reception of Complex Pulses or Signals:
    One Programmable 8-Bit Counter/Timer with Two Capture Registers
    One Programmable 16-Bit Counter/Timer with One 16-Bit Capture Register
    Programmable Input Glitch Filter for Pulse Reception
 
` Five Priority Interrupts
    Three External
    Two Assigned to Counter/Timers
 
` Low Voltage Detection and Standby Mode
 
` Programmable Watch-Dog/Power-On Reset Circuits
 
` Two Independent Comparators with Programmable Interrupt Polarity
 
` On-Chip Oscillator that Accepts a Crystal, Ceramic Resonator, LC, RC (Mask Option), or External Clock Drive
 
` Mask Selectable 200 kOhms Pull-Ups on Ports 0, 2, 3
    All Eight Port 2 Bits at One Time or Not
    Pull-Ups Automatically Disabled Upon Selecting Individual Pins as Outputs.
 
` Maskable Mouse/Trackball Interface on P00 Through P03.
 
` 32 kHz Oscillator Mask Option

Notes: :
* Voltage on all pins with respect to GND.
† See Ordering Information.
Stresses greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; operation of the device at any condition above those indicated in the operational sections of these specifications is not implied. Exposure to absolute maximum rating conditions for an extended period may affect device reliability.

The Z86LXX family of IR (Infrared) CCP™ (Consumer Controller Processor) Controllers are ROM/ROMless-based members of the Z8® single-chip microcontroller family with 256 bytes of internal RAM. The differentiating factor between these devices is the availability of ROM, and package options. For the 40 and 44-pin devices the use of external memory enables these Z8 microcontrollers to be used where code flexibility is required. Zilog's CMOS microcontrollers offers fast executing, efficient use of memory, sophisticated interrupts, input/output bit manipulation
capabilities, automated pulse generation/reception, and internal key-scan pull-up resistors. The Z86LXX product line offers easy hardware/software system expansion cost-effective and low power consumption.

The Z86LXX architecture is based on Zilog's 8-bit microcontroller core with an Expanded Register File to allow access
to register mapped peripherals, I/O circuits, and powerful counter/timer circuitry. The CCP offers a flexible I/O scheme, an efficient register and address space structure, and a number of ancillary features that are useful in many consumer, automotive, computer peripheral, and battery operated hand-held applications.

There are four basic address spaces available to support a wide range of configurations: Program Memory, Register
File, Expanded Register File, and External Memory. The register file of Z86LXX 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 registers. The Expanded Register File consists of two additional register groups (F and D). External Memory is not available on 28- pin versions.

To unburden the program from coping with such real-time problems as generating complex waveforms or receiving and demodulating complex waveform/pulses, the Z86LXX 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).

Notes of Z86LXX: All Signals with a preceding front slash, "/", are active Low, e.g., B//W (WORD is active Low); /B/W (BYTE is active Low, only).