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User’s Manual for Advantech SOM-A2558 series module V1.00
33
CSB with DMA mode, please check
with ae.risc@advantech.com.tw
first.
If use doesn’t want to use this pin as
DMA_REQ, use could use the pin as
GPIO. The pi
n connects to SoC
PXA255 GPIO19.
B49
MBREQ I
Memory Controller alternate bus
master request.
Allows an external
device to request the system bus
from the Memory Controller. If user
wants to design a controller in CSB
with this pin func
tion, please check
with ae.risc@advantech.com.tw first.
If use doesn’t want to use this pin as
DMA_REQ, use could use the pin as
GPIO. The pin connects to SoC
PXA255 GPIO14.
Pull low
with 1Kohm
A49
DMA_ACK1 O
Channel 1 DMA acknowledge.
Notifies an external device that it has
been acknowledged the DMA
controller. If user wants to design a
controller in CSB with DMA mode,
please check with
ae.risc@advantech.com.tw first.
If use doesn’t want to use this pin as
DMA_ACK, use could use the pin as
GPIO. The pin connects to SoC
PXA255 GPIO22.
No pulling
B50
MBGNT O
Memory Controller grant.
Notifies an
external device that it has been
granted the system bus. If user
wa
nts to design a controller in CSB
with this pin function, please check
with ae.risc@advantech.com.tw
first.
If use doesn’t want to use this pin as
MBGNT, use could use the pin as
GPIO. The pin connects to S
oC
PXA255 GPIO13.
Pull low
with 1Kohm
A50
3M6864 O 3.6864 MHz clock.
Output from
3.6864 MHz oscillator. No pulling
¦100-pin B2B connector Pin Out Table (X3 connector for PCI, ZV port,
MMC interface and Misc. function)
Pin
No.
Signals Typ
e Model Default state
B1 PCIAD0 IO
PCI address/data 0 No pulling
A1 PCIAD1 IO
PCI address/data 1 No pulling