Cypress CY7C1380C User Manual
Page 6
CY7C1380C
CY7C1382C
Document #: 38-05237 Rev. *D
Page 6 of 36
CY7C1380C–Pin Definitions
Name
TQFP
BGA
fBGA
I/O
Description
A
0
, A
1
, A
37,36,32,
33,34,35,
42,43,44,45,
46,47,48,
49,50,81,
82,99,100
P4,N4,
A2,B2,
C2,R2,
A3,B3,C3,
T3,T4,A5,B5,
C5,
T5,A6,B6,C6,
R6
R6,P6,A2,
A10,B2,
B10,N6,P3,P4,
P8,P9,P10,
P11,R3,R4,R8,
R9,R10,R11
Input-
Synchronous
Address Inputs used to select one of the
256K address locations. Sampled at the rising
edge of the CLK if ADSP or ADSC is active
LOW, and CE
1
,
CE
2
, and
CE
3
[2]
are sampled
active. A1: A0 are fed to the two-bit counter..
BW
A,
BW
B
BW
C,
BW
D
93,94,95,
96
L5,G5,
G3,L3
B5,A5,A4,
B4
Input-
Synchronous
Byte Write Select Inputs, active LOW.
Qualified with BWE to conduct byte writes to the
SRAM. Sampled on the rising edge of CLK.
GW
88
H4
B7
Input-
Synchronous
Global Write Enable Input, active LOW.
When asserted LOW on the rising edge of CLK,
a global write is conducted (ALL bytes are
written, regardless of the values on BW
X
and
BWE).
BWE
87
M4
A7
Input-
Synchronous
Byte Write Enable Input, active LOW. Sam-
pled on the rising edge of CLK. This signal must
be asserted LOW to conduct a byte write.
CLK
89
K4
B6
Input-
Clock
Clock Input. Used to capture all synchronous
inputs to the device. Also used to increment the
burst counter when ADV is asserted LOW,
during a burst operation.
CE
1
98
E4
A3
Input-
Synchronous
Chip Enable 1 Input, active LOW. Sampled on
the rising edge of CLK. Used in conjunction with
CE
2
and CE
3
to select/deselect the device.
ADSP is ignored if CE
1
is HIGH.
CE
2
97
-
B3
Input-
Synchronous
Chip Enable 2 Input, active HIGH. Sampled
on the rising edge of CLK. Used in conjunction
with CE
1
and CE
3
to select/deselect the device.
CE
3
92
-
A6
Input-
Synchronous
Chip Enable 3 Input, active LOW. Sampled on
the rising edge of CLK. Used in conjunction with
CE
1
and
CE
2
to select/deselect the device.Not
available for AJ package version.Not
connected for BGA. Where referenced, CE
3
is
assumed active throughout this document for
BGA.
OE
86
F4
B8
Input-
Asynchronous
Output Enable, asynchronous input, active
LOW. Controls the direction of the I/O pins.
When LOW, the I/O pins behave as outputs.
When deasserted HIGH, I/O pins are tri-stated,
and act as input data pins. OE is masked during
the first clock of a read cycle when emerging
from a deselected state.
ADV
83
G4
A9
Input-
Synchronous
Advance Input signal, sampled on the rising
edge of CLK, active LOW. When asserted, it
automatically increments the address in a burst
cycle.