4 PINS
18
EPSON
S1C38000 TECHNICAL MANUAL
4.2.3 CompactFlash / Generic Bus
Only one of either the CompactFlash or the Generic Bus Interface may be enabled.
CompactFlash is only supported in Little Endian mode.
Table 4-3 CompactFlash / Generic Bus
Pin Names
Type
Cell
QFP
Pin #
CFLGA
Pin #
Description
Selection
MA[22:0]
O
See MIC.
See Memory Controller.
MD[15:0]
IO
See MIC.
See Memory Controller.
CFCE2# /
GBCS1#
OTOB1
157
L1
This output pin has the following functions:
High-byte enable to CompactFlash
interface.
This pin is hi-Z under any of the following
conditions: during RESET#; when CARDEN
= 0; when CFCD2# is high; when CFCD1# is
high. This pin is externally pulled up by the
CompactFlash card.
Chip Select 1 (GBCS1#) for Generic Bus
interface.
Tri-state Output Buffer
(IOL=3mA)
CFCE1# /
GBCS0#
OTOB1
158
L2
This output pin has the following functions:
Low-byte enable to CompactFlash interface.
This pin is hi-Z under any of the following
conditions: during RESET#; when CARDEN
= 0; when CFCD2# is high; when CFCD1# is
high. This pin is externally pulled up by the
CompactFlash card.
Chip Select 0 (GBCS0#) for Generic Bus
interface.
Tri-state Output Buffer
(IOL=3mA)
CFOE# /
GBOE#
OTOB1
156
P2
This output pin has the following functions:
Output Enable signal to CompactFlash
interface for memory and attribute space.
This pin is hi-Z under any of the following
conditions: during RESET#; when CARDEN
= 0; when CFCD2# is high; when CFCD1# is
high. This pin is externally pulled up by the
CompactFlash card.
Output Enable signal to the Generic Bus
Interface.
Tri-state Output Buffer
(IOL=3mA)
CFWE# /
GBWE#
OTOB1
155
M1
This output pin has the following functions:
Write Enable signal to CompactFlash
interface for memory and attribute space.
This pin is hi-Z under any of the following
conditions: during RESET#; when CARDEN
= 0; when CFCD2# is high; when CFCD1# is
high. This pin is externally pulled up by the
CompactFlash card.
Write Enable signal to the Generic Bus
Interface.
Tri-state Output Buffer
(IOL=3mA)
CFIORD# /
GBRESET#
OTOB1
154
P1
This output pin has the following functions:
CompactFlash interface: Read command to
CompactFlash interface for I/O space. This
pin is hi-Z under any of the following
conditions: during RESET#; when CARDEN
= 0; when CFCD2# is high; when CFCD1# is
high. This pin is externally pulled up by the
CompactFlash card.
Generic Bus interface: Active low Reset
signal to the Generic Bus interface.
Tri-state Output Buffer
(IOL=3mA)
CFIOWR#
O
TOB1
153
M2
Write command to CompactFlash interface for
I/O space.
This pin is hi-Z under any of the following
conditions: during RESET#; when CARDEN =
0; when CFCD2# is high; when CFCD1# is
high. This pin is externally pulled up by the
CompactFlash card.
Tri-state Output Buffer
(IOL=3mA)
CFREG# /
GBLOWBAT#
OTOB1
152
N1
This output pin has the following functions:
CompactFlash interface: REG signal to
CompactFlash interface to select attribute
and I/O space.
This pin is hi-Z under any of the following
conditions: during RESET#; when CARDEN
= 0; when CFCD2# is high; when CFCD1# is
high. This pin is externally pulled up by the
CompactFlash card.
Generic Bus interface: Low battery signal
(active low) to the Generic Bus interface.
Tri-state Output Buffer
(IOL=3mA)