Motorola MSC8101 ADS User Manual download pdf (Page 82)

MOTOROLA MSC8101ADS RevB User’s Manual B-81

C32 N.C. - Not Connected

D1 GND P Digital Ground. Connected to main GND plane of the ADS.

D4 EXPWE0b O Expansion Write Enable (0:1) (L). This are buffered GPCM Write

Enable lines (0:1). They are meant to qualify writes to GPCM

controlled 8/16 data bus width memory devices. This to provide

eased access to various communication transceivers.

EXPWE0b controls EXPD(0:7) while EXPWE1b controls

EXPD(8:15). These lines may also function as UPM controlled

Byte Select Lines, which allow control over almost any type of

memory device.

D5 EXPWE1b

D6 GND P Digital Ground. Connected to main GND plane of the ADS.

D7 EXPGL0b O Expansion General Purpose Lines (0:5). These are buffered

GPL(0:5)b lines which assist UPM control over memory device if

necessary. These are output only signals and therefore, do not

support H/W controlled UPM waits (GPL4 as such UPWAIT).

D8 EXPGL1b

D9 EXPGL2b

D10 EXPGL3b

D11 EXPGL4b

D12 EXPGL5b

D13 GND P Digital Ground. Connected to main GND plane of the ADS.

D14 V3.3 P 3.3V Power Out. These lines are connected to the main 3.3V

plane of the MSC8101ADS, this, to provide 3.3V power where

necessary for external tool connected. The amount of current

allowed to be drawn from this power bus is found in

TABLE 7-1.

"Off-Board Application Maximum Current Consumption" on

page 66

D15 EXPCTL0 O Expansion Control Line 0. This line is a buffered version of

MSC8101’s BCTL0 (Bus Control Line 0) which serves as R~/W,

provided for expansion board’s use.

TABLE B1-2. P1 - System Expansion - Interconnect Signals

Pin No. Signal Name Attribute Description

Frees

cale Semiconductor,

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

nc...

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Motorola MSC8101 ADS User Manual Page 82