Z8614

Z8614 CPS DC-4038-03 CUSTOMER PROCUREMENT SPECIFICATION Z8614 KEYBOARD CONTROLLER (KBC™) NMOS Z8® 8-BIT MCU DESCRIPTION The Z8614 Keyboard Controller (KBC ™) introduces a new level of sophistication to single-chip architecture. The Z8614 is a member of the Z8 single-chip microcontroller family with 4 Kbytes of ROM. The Z8614 KBC is housed in 40-lead DIP and 44-lead PLCC packages, and is manufactured in NMOS technology. Zilog’s microcontroller offers fast execution, efficient use of memory, sophisticated interrupt, input/output bit manipulation capabilities, and easy hardware/software system expansion along with low cost and low power consumption. The KBC architecture is characterized by a flexible I/O scheme, an efficient register, I/O, and a number of ancillary features that are useful in keyboard applications. The device applications demand powerful I/O capabilities. The KBC fulfills this with 32 pins dedicated to input and output. These lines are grouped into four ports, each port consists of eight lines, and are configurable under software control to provide timing, status signals, and serial or parallel I/O ports. The Z8614 offers low EMI emission achieved by means of several modifications in the output drivers and clock circuitry of the device. There are two basic address spaces available to support this wide range of configurations: Program Memory and 124 GeneralPurpose Registers. The KBC offers two on-chip counter/timers with a large number of user selectable modes....