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Fabricante

8XL196NP

COMMERCIAL CHMOS 16-BIT MICROCONTROLLER

Intel 

8XL196NP COMMERCIAL CHMOS 16-BIT MICROCONTROLLER

Name

WRH#

WRL#

XTAL1

XTAL2

Table 6. Signal Descriptions (Continued)

Type

O

Description

Write High†

During 16-bit bus cycles, this active-low output signal is asserted for high-byte

writes and word writes to external memory. During 8-bit bus cycles, WRH# is

asserted for all write operations.

WRH# shares a package pin with BHE#.

† When this pin is configured as a special-function signal (P5_MODE.5 = 1), the

chip configuration register 0 (CCR0) determines whether it functions as BHE# or

WRH#. CCR0.2 = 1 selects BHE#; CCR0.2 = 0 selects WRH#.

O Write Low†

During 16-bit bus cycles, this active-low output signal is asserted for low-byte writes

and word writes to external memory. During 8-bit bus cycles, WRL# is asserted for

all write operations.

WRL# shares a package pin with WR#.

† When this pin is configured as a special-function signal (P5_MODE.2 = 1), the

chip configuration register 0 (CCR0) determines whether it functions as WR# or

WRL#. CCR0.2 = 1 selects WR#; CCR0.2 = 0 selects WRL#.

I Input Crystal/Resonator or External Clock Input

Input to the on-chip oscillator and the internal clock generators. The internal clock

generators provide the peripheral clocks, CPU clock, and CLKOUT signal. When

using an external clock source instead of the on-chip oscillator, connect the clock

input to XTAL1. The external clock signal must meet the VIH specification for XTAL1.

O Inverted Output for the Crystal/Resonator

Output of the on-chip oscillator inverter. Leave XTAL2 floating when the design

uses an external clock source instead of the on-chip oscillator.

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