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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.
D2
D3
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,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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