IA186EM-PQF100I-R datasheet(12/133 Pages) INNOVASIC

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IA186EM/IA188EM

Data Sheet

8/16-BIT Microcontrollers

As of Production Version -03

MDRAM (0e0h) - The Memory Partition Register holds the A19-A13 address bits of the 20-bit base

refresh address.

The MDRAM register contains 0000h at reset.

M [6:0]

M [6:0] (bits 15-9) – Upper bits corresponding to address bits a19-a13 of the 20-Bit memory refresh

address. These bits are not available on the a19-a0 bus. When using PSRAM mode, M6-M0 must be

programmed to 0000000b.

Reserved [8:0] (bits 8-0) – Reserved. These bits read back as 0.

D1CON (0dah) - DMA CONtrol Registers.

D0CON (0cah)

DMA Control Registers control operation of the two DMA channels. The D0CON and D1CON registers

are undefined at reset, except ST that is set to 0.

DM/IOn

DDEC

DINC

SM/IOn

SDEC

SINC

INT

SYN1-

SYN0

P TDRQ

Res

CHG

Bn/W

DM/IOn (bit 15) – Destination Address Space Select selects memory or I/O space for the destination

address. When DM/IO is set to 1, the destination address is in memory space. When set to 0, the

destination address is in I/O space.

DDEC (bit 14) – Destination Decrement automatically decrements the destination address after each

transfer when set to 1. The address is decremented by 1 or 2, depending on the byte/word bit (Bn/W,

bit 0). The address does not change if the increment and decrement bits are set to the same value (00b

or 11b).

DINC (bit 13) – Destination Increment, when set to 1, automatically increments the destination

address after each transfer. The address is incremented by 1 or 2, depending on the byte/word bit

(Bn/W, bit 0). The address does not change if the increment and decrement bits are set to the same

value (00b or 11b).

SM/IOn (bit 12) – Source Address Space Select selects memory or I/O space for the source address.

When SM/IOn is set to 1, the source address is in memory space, while when 0, the source address is

in I/O space.

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

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