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Z86L827PZ008SC Datasheet(PDF) 9 Page - Zilog, Inc. |
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Z86L827PZ008SC Datasheet(HTML) 9 Page - Zilog, Inc. |
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9 / 79 page  Z86L825/826/827 20-Pin Low-Voltage IR Microcontrollers PS008808-1203 P R E L I M I N A R Y 2 • Mask selectable 200±50% KΩ transistor pull-ups on Ports 2 and 3. Port 0 always has pull-up selected. – Programmable mask options: – Oscillator selection: RC oscillator versus crystal or other clock source – Oscillator operational mode: normal high-frequency operation enabled or 32-KHz operation enabled – Port 2: 0–7 pull-ups – Port 3: pull-ups – Port 0: 0–3 Mouse Mode: Normal Mode(.5VDD input threshold) versus Mouse Mode (.4VDD input threshold) General Description The Z86L825/826/827 are ROM-based members of the Z8 MCU single-chip fam- ily of IR (infrared) with 237 bytes of general-purpose RAM and 4 KB of ROM. ZiLOG’s CMOS microcontrollers offer fast executing, efficient use of memory, sophisticated interrupts, input/output bit manipulation capabilities, automated pulse generation/reception, and internal key-scan pull-up transistors. The Z86L825 architecture is based on ZiLOG's 8-bit microcontroller core with an Expanded Register File to allow access to register mapped peripherals, I/O cir- cuits, and powerful counter/timer circuitry. The Z8 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. The register file consists of 256 bytes of RAM. It includes three I/O port registers, 16 control and status registers and the rest are General Purpose registers. Regis- ter FEh (SPH) can be used as general purpose register. The Expanded Register File consists of two additional register groups (F and D). The Z86L825 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. |
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