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Z8C520 Datasheet(PDF) 1 Page - Zilog, Inc. |
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Z8C520 Datasheet(HTML) 1 Page - Zilog, Inc. |
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1 / 43 page  DS97KEY2005 P R E L I M I N A R Y 1 PRELIMINARY PRODUCT SPECIFICATION Z8E520/C520 1 1.5 MBPS USB LOW-POWER DEVICE CONTROLLER FOR MULTIPROTOCOL POINTING DEVICES FEATURES s Six Vectored Interrupts with Fixed Priority s Processor Speed Dividable by Firmware Control s Operating Current: 5 mA typical in USB Mode; 2.5 mA typical in Serial Mode (@ 3 MHz); 5 mA typical in PS/2 Mode s 16 Total Input/Output Pins (Open-Drain/Push-Pull) Configurable s 6 inputs with 3 level Programmable Reference Comparators s 16-Bit Programmable Watch-Dog Timer (WDT) with Internal RC Oscillator s Software Programmable Timers Configurable as: – Two 8-Bit Standard Timers and One 16-Bit Standard Timer or – One 16-Bit Standard Timer and One 16-Bit Pulse Width Modulator (PWM) Timer s Identical Masked ROM Version (Z8C520) s On-Chip Oscillator that accepts a Ceramic Resonator or External Clock s Hardware Support for PS/2, Serial, USB, and General- Purpose I/O (GPIO) s Power Reduction Modes: – STOP Mode (functionality shut down except SMR) – HALT Mode (XTAL still running-peripherals active) s USB SIE Compliant with USB Spec 1.0 s 4.0 VDC to 6.0 VDC Operating Range @ 0 °C to +70°C GENERAL DESCRIPTION Zilog’s Z8E520 (OTP) and Z8C520 (Masked ROM) micro- controllers are low-power Z8Plus MCUs, designed for the cost-effective implementation of USB and multiprotocol pointing devices. For applications demanding powerful I/O capabilities, the Z8E520's input and output lines are grouped into two ports, and are configurable under software control to provide tim- ing, status signals, or parallel I/O. Both 8-bit and 16-bit timers, with a large number of user se- lectable modes, off-load the system of administering real- time tasks such as counting/timing and I/O data communi- cations. The microcontroller clock frequency is derived from the system clock by a programmable divider under firmware control. The device is capable of functioning in four distinct, select- able communications modes: PS/2, RS232, GPIO (Gener- al-purpose I/O), and USB. The communications mode de- termines the functionality of the two special serial communications pins (PB6 and PB7). The device is placed in the required mode when firmware sets the specified mode bit in the communications control register. The firm- ware interface is similar in all modes. The same buffer area in RAM will accept the data to be transmitted. Up to 8 bytes may be loaded, and the data will actually be transmitted as soon as the appropriate command is issued (setting In Packet Ready in USB mode, for example). Part ROM RAM Speed Number (KB) (Bytes) (MHz) Z8E520 (OTP) 6 176 12 Z8C520 (ROM) 6 176 12 |
Similar Description - Z8C520 |
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