Z86C20

Z86COO/C10/C20 CM OS Z8@MCU FEATURES III Complete microcomputer, 2K (86COO), 4K (86Cl0), or 8K (86C20) bytes of ROM, 124 bytes of RAM, and 22110 lines. I!!I 144-byte register file, including 124 general-purpose registers, four I/O port registers, and 14 status and control registers. Jill Average instruction execution time of 1.5 us, maximum of 2.8 us. L!J Vectored, priority interrupts for I/O and counter/timers. III Two programmable 8-bit counter/timers, each with a 6-bit programmable prescaler. June 1987 I:J Register Pointer so that short, fast instructions can access any of nine wO,rking-register groups in 1.0 us. o On-chip oscillator which accepts crystal,' external clock drive, lC, ceramic resonator. o Standby modes - - Halt and Stop. I1l Single +5V power supply ---' all pins TTlcompatible. I!!I 12 MHz. IIlI CMOS process. GENERAL DESCRIPTION Z86C10/C20 microcomputer (Figures 1 and 2) introduces a new level of sophistication to single-chip architecture. Compared to earlier single-chip microcomputers, the Z86C10/C200ffers faster execution; more efficient use of memory; more sophisticated interrupt, input/output and bit-manipulation capabilities; and easier system expansion. osTIMING AND ( - RESET CONTROL - Ipo. po, +5V -+- XTALI XTAL2 PO, Z86COO ~M'{~ P03 MCU PO. Z86C10 Pl. .-.-..PO. MCU PI, .....P2, Z86C20 PI, ......P22 MCU P13 .....P23 Pl. P2. Pl. "M'm -P2. ..... -GND Pl. P17 CLOCK PORT 3 PORT 1 Figure 1. Pin Functions +5V XTAL2 XTAU RESET os P3. GND PO...