
4 PINS
20
EPSON
S1C38000 TECHNICAL MANUAL
4.2.4 DMA Controller
CFVC3 /
GBVC1
O
OB1
131
T6
This output pin has the following functions:
This is an output to control the power supply
of the CompactFlash interface.
This pin is driven low under the following
conditions: during RESET#; when APDEN =
1 and CFCD2# is high; when APDEN = 1
and CFCD1# is high.
This is an output to control the power supply
of the Generic Bus interface.
Output Buffer (IOL=3mA)
CFSHDN# /
GBSHDN#
O
OB1
130
P7
This output pin has the following functions:
This “Shutdown” signal can be used to
disable the power supply of the
CompactFlash interface.
This “Shutdown” signal can be used to
disable the power supply of the Generic Bus
interface.
Output Buffer (IOL=3mA)
GBAEN#
O
OB1
129
T7
This output pin has the following functions:
Generic Bus interface: Address Enable
signal (active low) for external buffer.
GPO Port G bit 5 pin (output only).
Output Buffer (IOL=3mA)
CFDEN# /
GBDEN#
O
OB1
127
T8
This output pin has the following functions:
CompactFlash interface: Data Enable for
external transceiver and Address Enable for
external buffer.
Generic Bus interface: Data Enable signal
(GBDEN#, active low) for external
transceiver.
GPO Port G bit 4 pin (output only).
Output Buffer (IOL=3mA)
CFDDIR /
GBDDIR
O
OB1
126
P8
This output pin has the following functions:
CompactFlash interface: Data direction
signal for external transceiver.
Generic Bus interface: Data direction signal
for external transceiver.
GPO Port G bit 3 pin (output only).
Output Buffer (IOL=3mA)
Table 4-4 DMA Controller
Pin Names
Type
Cell
QFP
Pin #
CFLGA
Pin #
Description
Selection
DREQ[1:0]#
IO
CBG1
43, 44
D12, E11
These default input pins have the following
functions:
DMA Request.
GPIO Port F bits [1:0] pins.
Bidirectional Buffer with
AND Type Gated Input
(IOL=3mA)
DACK[1:0]#
IO
CBG1
45, 46
C12, A11
These default output pins have the following
functions:
DMA Acknowledge.
GPIO Port F bits [3:2] pins.
Bidirectional Buffer with
AND Type Gated Input
(IOL=3mA)
DEOT#
IO
CBG1
47
A12
This default output pin has the following
functions:
DMA End-Of-Transfer (Count = 0).
GPIO Port F bit 4 pin.
Bidirectional Buffer with
AND Type Gated Input
(IOL=3mA)
Table 4-3 CompactFlash / Generic Bus (Continued)
Pin Names
Type
Cell
QFP
Pin #
CFLGA
Pin #
Description
Selection