IA186EM-PTQ100I-R datasheet(19/133 Pages) INNOVASIC

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IA186EM/IA188EM

Data Sheet

8/16-BIT Microcontrollers

As of Production Version -03

PCS Address Ranges

Range

PCSn Line

Low

High

PCS0n

Base Address

Base Address + 255

PCS1n

Base Address + 256

Base Address + 511

PCS2n

Base Address + 512

Base Address + 767

PCS3n

Base Address + 768

Base Address + 1023

Reserved

N/A

PCS5n

Base Address + 1280

Base Address

PCS6n

Base Address + 1536

Base Address

Reserved [6:4] (bits 6-4) – Set to 1.

R [3] (bit 3) – Wait State Value. See the following table.

R [2] (bit 2) – Ready Mode. When 0, external ready is required. When 1, external ready is ignored.

But in each case the number of wait states is determined as in the following table.

R [1:0] (bits 1 – 0) – Wait-State Value. See following table. It should be noted that pcs6_n – pcs5_n

and pcs3_n – pcs0_n pins are multiplexed with the programmable I/O pins. And for them to function

as chip selects, the PIO mode and direction settings for these pins must be set to 0 for normal

operation.

PCS3n – PCS0n Wait–State Encoding

Wait States

LMCS (0a2h) - Low Memory Chip Select Register configures the Low Memory Chip Select that has

been provided to facilitate access to the interrupt vector table located at 00000h or the bottom of memory.

The lcs_n pin is not active at reset.

The width of the data bus for the lcs_n space should be configured in the AUXCON register before

activating the lcs_n chip select pin, by any write access to the LMCS register.

3737 Princeton NE, Ste 130 • Albuquerque, NM 87107 • Tel 505.883.5263 • Fax 505.883.5477 • www.Innovasic.com

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