MQ80C196KB 查看數據表（PDF） - Intel

零件编号

产品描述 (功能)

生产厂家

MQ80C196KB

16-BIT HIGH PERFORMANCE CHMOS MICROCONTROLLER

Intel 

M80C196KB

PIN DESCRIPTIONS

Symbol

Name and Function

VCC

VSS

VREF

Main supply voltage (5V)

Digital circuit ground (0V) There are three VSS pins all of which must be connected

Reference voltage for the A D converter (5V) VREF is also the supply voltage to the

analog portion of the A D converter and the logic used to read Port 0 Must be connected

for A D and Port 0 to function

ANGND

VPP

XTAL1

Reference ground for the A D converter Must be held at nominally the same potential as

VSS

Timing pin for the return from powerdown circuit Connect this pin with a 1 mF capacitor to

VSS and a 1 MX resistor to VCC If this function is not used VPP may be tied to VCC This

pin was VBB on the 8X9X-90 parts and is the programming voltage on EPROM part

Input of the oscillator inverter and of the internal clock generator

XTAL2

Output of the oscillator inverter

CLKOUT

Output of the internal clock generator The frequency of CLKOUT is the oscillator

frequency It has a 50% duty cycle

RESET

Reset input to the chip Input low for at least 4 state times to reset the chip The

subsequent low-to-high transition re- synchronizes CLKOUT and commences a 10-state-

time sequence in which the PSW is cleared a byte read from 2018H loads CCR and a

jump to location 2080H is executed Input high for normal operation RESET has an

internal pullup

BUSWIDTH

Input for buswidth selection If CCR bit 1 is a one this pin selects the bus width for the bus

cycle in progress If BUSWIDTH is a 1 a 16-bit bus cycle occurs If BUSWIDTH is a 0 an

8-bit cycle occurs If CCR bit 1 is a 0 the bus is always an 8-bit bus This pin is the TEST

pin on 8X9X-90 parts Systems with TEST tied to VCC do not need to change

8

Share Link: