Cypress CY7C0852AV-133BBI Flex36tm 3.3v 32k/64k/128k/256k x 36 synchronous dual-port ram Datasheet

CY7C093794V CY7C093894V CY7C09289V CY7C09369V CY7C09379V CY7C09389V3.3V 64K/128K x 36 and 128K/256K x 18
Synchronous Dual-Port RAM
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
FLEx36TM 3.3V 32K/64K/128K/256K x 36
Synchronous Dual-Port RAM
Features
Functional Description
• True dual-ported memory cells that allow simultaneous
access of the same memory location
The FLEx36™ family includes 1M, 2M, 4M and 9M pipelined,
synchronous, true dual-port static RAMs that are high-speed,
low-power 3.3V CMOS. Two ports are provided, permitting
independent, simultaneous access to any location in memory.
The result of writing to the same location by more than one port
at the same time is undefined. Registers on control, address,
and data lines allow for minimal set-up and hold time.
• Synchronous pipelined operation
• Organization of 1-Mbit, 2-Mbit, 4-Mbit and 9-Mbit
devices
• Pipelined output mode allows fast operation
During a Read operation, data is registered for decreased
cycle time. Each port contains a burst counter on the input
address register. After externally loading the counter with the
initial address, the counter will increment the address internally (more details to follow). The internal Write pulse width is
independent of the duration of the R/W input signal. The
internal Write pulse is self-timed to allow the shortest possible
cycle times.
• 0.18-micron CMOS for optimum speed and power
• High-speed clock to data access
• 3.3V low power
— Active as low as 225 mA (typ)
— Standby as low as 55 mA (typ)
• Mailbox function for message passing
A HIGH on CE0 or LOW on CE1 for one clock cycle will power
down the internal circuitry to reduce the static power
consumption. One cycle with chip enables asserted is required
to reactivate the outputs.
• Global master reset
• Separate byte enables on both ports
• Commercial and industrial temperature ranges
• IEEE 1149.1-compatible JTAG boundary scan
• 172-ball FBGA (1 mm pitch) (15 mm × 15 mm)
• 176-pin TQFP (24 mm × 24 mm × 1.4 mm)
• Counter wrap around control
— Internal mask register controls counter wrap-around
— Counter-interrupt flags to indicate wrap-around
Additional features include: readback of burst-counter internal
address value on address lines, counter-mask registers to
control the counter wrap-around, counter interrupt (CNTINT)
flags, readback of mask register value on address lines,
retransmit functionality, interrupt flags for message passing,
JTAG for boundary scan, and asynchronous Master Reset
(MRST).
The CY7C0853A device in this family has limited features.
Please see See “Address Counter and Mask Register
Operations[10]” on page 8. for details.
— Memory block retransmit operation
• Counter readback on address lines
• Mask register readback on address lines
• Dual Chip Enables on both ports for easy depth
expansion
Table 1. Product Selection Guide
Density
Part Number
Max. Speed (MHz)
1-Mbit
(32K x 36)
2-Mbit
(64K x 36)
4-Mbit
(128K x 36)
9-Mbit
(256K x 36)
CY7C0850AV
CY7C0851AV
CY7C0852AV
CY7C0853AV
167
167
167
133
Max. Access Time - Clock to Data (ns)
4.0
4.0
4.0
4.7
Typical operating current (mA)
225
225
225
270
176TQFP
172FBGA
176TQFP
172FBGA
176TQFP
172FBGA
172FBGA
Package
Cypress Semiconductor Corporation
Document #: 38-06070 Rev. *G
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised August 15, 2005
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Logic Block Diagram[1]
OEL
R/WL
OER
R/WR
B0L
B0R
B1L
B1R
B2L
B2R
B3L
B3R
CE0L
CE1L
DQ27L–DQ35L
DQ18L–DQ26L
DQ9L–DQ17L
DQ0L–DQ8L
CE0R
CE1R
9
9
9
9
I/O
Control
9
I/O
Control
9
9
9
Addr.
Read
Back
DQ27R–DQ35R
DQ18R–DQ26R
DQ9R–DQ17R
DQ0R–DQ8R
Addr.
Read
Back
True
Dual-Ported
RAM Array
A0L–A17L
18
18
Mask Register
CNT/MSKL
ADSL
Counter/
Address
Register
CNTENL
CNTRSTL
CLKL
Mask Register
Address
Address
Decode
Decode
Mirror Reg
INTL
Interrupt
Logic
ADS
Counter/
Address
Register
CNTEN
CNTRSTR
Mirror Reg
CNTINTL
MRST
Reset
Logic
TMS
TDI
TCK
JTAG
TDO
Interrupt
Logic
A0R–A17R
CNT/MSKR
CLKR
CNTINTR
INTR
Note:
1. 9M device has 18 address bits, 4M device has 17 address bits, 2M device has 16 address bits, and 1M device has 15 address bits.
Document #: 38-06070 Rev. *G
Page 2 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Pin Configurations
172-ball BGA
Top View
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
DQ32L
DQ30L
CNTINTL
VSS
DQ13L
VDD
DQ11L
DQ11R
VDD
DQ13R
VSS
CNTINTR
DQ30R
DQ32R
B
A0L
DQ33L
DQ29L
DQ17L
DQ14L
DQ12L
DQ9L
DQ9R
DQ12R
DQ14R
DQ17R
DQ29R
DQ33R
A0R
C
NC
A1L
DQ31L
DQ27L
INTL
DQ15L
DQ10L
DQ10R
DQ15R
INTR
DQ27R
DQ31R
A1R
NC
D
A2L
A3L
DQ35L
DQ34L
DQ28L
DQ16L
VSS
VSS
DQ16R
DQ28R
DQ34R
DQ35R
A3R
A2R
E
A4L
A5L
CE1L
B0L
VDD
VSS
VDD
VDD
B0R
CE1R
A5R
A4R
F
VDD
A6L
A7L
B1L
VDD
VSS
B1R
A7R
A6R
VDD
G
OEL
B2L
B3L
CE0L
CE0R
B3R
B2R
OER
H
VSS
R/WL
A8L
CLKL
CLKR
A8R
R/WR
VSS
J
A9L
A10L
VSS
ADSL
VSS
VDD
ADSR
MRST
A10R
A9R
K
A11L
A12L
A15L[2]
CNTRSTL
VDD
VDD
VSS
VDD
CNTRSTR
A15R[2]
A12R
A11R
L
CNT/MSKL
A13L
CNTENL
DQ26L
DQ25L
DQ19L
VSS
VSS
DQ19R
DQ25R
DQ26R
CNTENR
A13R
CNT/MSKR
M
A16L[2]
A14L
DQ22L
DQ18L
TDI
DQ7L
DQ2L
DQ2R
DQ7R
TCK
DQ18R
DQ22R
A14R
A16R[2]
N
DQ24L
DQ20L
DQ8L
DQ6L
DQ5L
DQ3L
DQ0L
DQ0R
DQ3R
DQ5R
DQ6R
DQ8R
DQ20R
DQ24R
P
DQ23L
DQ21L
TDO
VSS
DQ4L
VDD
DQ1L
DQ1R
VDD
DQ4R
VSS
TMS
DQ21R
DQ23R
CY7C0850V
CY7C0851V
CY7C0852V
Note:
2. For CY7C0851V, pins M1 and M14 are NC. For CY7C0850V, pins K3, K12 M1, and M14 are NC
Document #: 38-06070 Rev. *G
Page 3 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Pin Configurations (continued)
172-ball BGA
Top View
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
DQ32L
DQ30L
NC
VSS
DQ13L
VDD
DQ11L
DQ11R
VDD
DQ13R
VSS
NC
DQ30R
DQ32R
B
A0L
DQ33L
DQ29L
DQ17L
DQ14L
DQ12L
DQ9L
DQ9R
DQ12R
DQ14R
DQ17R
DQ29R
DQ33R
A0R
C
A17L
A1L
DQ31L
DQ27L
INTL
DQ15L
DQ10L
DQ10R
DQ15R
INTR
DQ27R
DQ31R
A1R
A17R
D
A2L
A3L
DQ35L
DQ34L
DQ28L
DQ16L
VSS
VSS
DQ16R
DQ28R
DQ34R
DQ35R
A3R
A2R
E
A4L
A5L
VDD
B0L
VDD
VSS
VDD
VDD
B0R
VDD
A5R
A4R
F
VDD
A6L
A7L
B1L
VDD
VSS
B1R
A7R
A6R
VDD
G
OEL
B2L
B3L
VSS
VSS
B3R
B2R
OER
H
VSS
R/WL
A8L
CLKL
CLKR
A8R
R/WR
VSS
J
A9L
A10L
VSS
VSS
VSS
VDD
VSS
MRST
A10R
A9R
K
A11L
A12L
A15L
VDD
VDD
VDD
VSS
VDD
VDD
A15R
A12R
A11R
L
VDD
A13L
VSS
DQ26L
DQ25L
DQ19L
VSS
VSS
DQ19R
DQ25R
DQ26R
VSS
A13R
VDD
M
A16L
A14L
DQ22L
DQ18L
TDI
DQ7L
DQ2L
DQ2R
DQ7R
TCK
DQ18R
DQ22R
A14R
A16R
N
DQ24L
DQ20L
DQ8L
DQ6L
DQ5L
DQ3L
DQ0L
DQ0R
DQ3R
DQ5R
DQ6R
DQ8R
DQ20R
DQ24R
P
DQ23L
DQ21L
TDO
VSS
DQ4L
VDD
DQ1L
DQ1R
VDD
DQ4R
VSS
TMS
DQ21R
DQ23R
Document #: 38-06070 Rev. *G
CY7C0853V
Page 4 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
A6L
10
11
12
A7L
B0L
13
14
B1L
15
16
17
18
VDD
VSS
20
21
22
23
VSS
R/WL
24
25
CLKL
26
27
28
29
30
A10L
33
34
A11L
A12L
35
36
VSS
37
VDD
A13L
38
DQ32R
DQ33R
DQ31R
DQ30R
VSS
VDD
136
135
134
137
DQ27R
DQ29R
DQ28R
139
138
140
DQ16R
CNTINTR
INTR
142
141
143
DQ14R
DQ17R
DQ15R
145
144
146
VSS
DQ13R
148
147
VDD
150
149
DQ11R
DQ12R
151
DQ10R
153
152
DQ9L
DQ9R
154
DQ10L
156
155
DQ12L
DQ11L
157
VDD
159
158
DQ13L
VSS
160
DQ14L
162
161
DQ15L
DQ17L
163
DQ16L
165
164
INTL
CNTINTL
166
DQ27L
168
167
DQ28L
DQ29L
169
DQ30L
171
170
172
VDD
VSS
DQ31L
133
123
122
A4R
A5R
121
120
119
118
117
A6R
A7R
B0R
B1R
CE1R
B2R
B3R
OER
CE0R
111
110
109
108
107
VDD
VSS
106
105
104
103
MRST
ADSR
VDD
VSS
R/WR
CLKR
CNTENR
CNTRSTR
CNT/MSKR
A8R
A9R
A10R
A11R
A12R
VSS
VDD
A13R
A14R
A15R[2]
A16R[2]
DQ24R
88
DQ20R
DQ23R
DQ26R
DQ22R
85
86
87
84
VSS
VDD
DQ21R
82
83
81
DQ19R
DQ25R
DQ18R
79
80
78
TMS
TCK
DQ8R
76
77
75
DQ6R
DQ7R
DQ5R
73
74
71
72
VSS
DQ4R
VDD
70
68
69
DQ2R
DQ3R
DQ1R
67
65
66
DQ0L
DQ0R
DQ1L
64
62
63
DQ3L
DQ2L
VDD
61
59
60
DQ4L
VSS
DQ5L
58
56
57
A2R
114
113
112
93
92
91
90
89
Document #: 38-06070 Rev. *G
A1R
A3R
VSS
VDD
39
40
41
42
43
44
DQ7L
DQ6L
DQ24L
DQ20L
A0R
128
127
126
125
124
95
94
DQ8L
A15L[2]
A16L[2]
129
97
96
55
A14L
DQ35R
NC
102
101
100
99
98
31
32
53
54
A8L
A9L
TDI
TDO
CNTENL
CNTRSTL
CNT/MSKL
DQ18L
VSS
ADSL
CY7C0850V
CY7C0851V
CY7C0852V
52
VDD
174
173
19
50
51
OEL
CE0L
DQ25L
DQ19L
B3L
DQ34R
132
131
130
116
115
DQ21L
CE1L
B2L
49
A4L
A5L
DQ33L
DQ32L
8
9
47
48
A3L
VSS
VDD
4
5
6
7
VDD
VSS
A2L
176-pin Thin Quad Flat Pack (TQFP)
Top View
3
DQ22L
A1L
1
2
45
46
DQ35L
NC
A0L
DQ26L
DQ23L
DQ34L
176
175
Pin Configurations (continued)
Page 5 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Pin Definitions
Left Port
Right Port
A0L–A17L[1]
A0R–A17R[1]
Address Inputs.
Description
ADSL[3]
ADSR[3]
Address Strobe Input. Used as an address qualifier. This signal should be asserted LOW
for the part using the externally supplied address on the address pins and for loading this
address into the burst address counter.
CE0L[3]
CE0R[3]
Active LOW Chip Enable Input.
CE1L[3]
CE1R[3]
Active HIGH Chip Enable Input.
CLKL
CLKR
Clock Signal. Maximum clock input rate is fMAX.
CNTENL[3]
CNTENR[3]
Counter Enable Input. Asserting this signal LOW increments the burst address counter of
its respective port on each rising edge of CLK. The increment is disabled if ADS or CNTRST
are asserted LOW.
CNTRSTL[3]
CNTRSTR[3]
Counter Reset Input. Asserting this signal LOW resets to zero the unmasked portion of the
burst address counter of its respective port. CNTRST is not disabled by asserting ADS or
CNTEN.
CNT/MSKL[3]
CNT/MSKR[3]
Address Counter Mask Register Enable Input. Asserting this signal LOW enables access
to the mask register. When tied HIGH, the mask register is not accessible and the address
counter operations are enabled based on the status of the counter control signals.
DQ0L–DQ35L
DQ0R–DQ35R
Data Bus Input/Output.
OEL
OER
Output Enable Input. This asynchronous signal must be asserted LOW to enable the DQ
data pins during Read operations.
INTL
INTR
Mailbox Interrupt Flag Output. The mailbox permits communications between ports. The
upper two memory locations can be used for message passing. INTL is asserted LOW when
the right port writes to the mailbox location of the left port, and vice versa. An interrupt to a
port is deasserted HIGH when it reads the contents of its mailbox.
CNTINTL[3]
CNTINTR[3]
Counter Interrupt Output. This pin is asserted LOW when the unmasked portion of the
counter is incremented to all “1s.”
R/WL
R/WR
Read/Write Enable Input. Assert this pin LOW to write to, or HIGH to Read from the dual
port memory array.
B0L–B3L
B0R–B3R
Byte Select Inputs. Asserting these signals enables Read and Write operations to the
corresponding bytes of the memory array.
MRST
Master Reset Input. MRST is an asynchronous input signal and affects both ports. Asserting
MRST LOW performs all of the reset functions as described in the text. A MRST operation
is required at power-up.
TMS
JTAG Test Mode Select Input. It controls the advance of JTAG TAP state machine. State
machine transitions occur on the rising edge of TCK.
TDI
JTAG Test Data Input. Data on the TDI input will be shifted serially into selected registers.
TCK
JTAG Test Clock Input.
TDO
JTAG Test Data Output. TDO transitions occur on the falling edge of TCK. TDO is normally
three-stated except when captured data is shifted out of the JTAG TAP.
VSS
Ground Inputs.
VDD
Power Inputs.
Note:
3. These pins are not available for CY7C0853AV device.
Document #: 38-06070 Rev. *G
Page 6 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Master Reset
The FLEx36 family devices undergo a complete reset by
taking its MRST input LOW. The MRST input can switch
asynchronously to the clocks. The MRST initializes the
internal burst counters to zero, and the counter mask registers
to all ones (completely unmasked). The MRST also forces the
Mailbox Interrupt (INT) flags and the Counter Interrupt
(CNTINT) flags HIGH. The MRST must be performed on the
FLEx36 family devices after power-up.
Mailbox Interrupts
The upper two memory locations may be used for message
passing and permit communications between ports. Table 2
shows the interrupt operation for both ports of CY7C0853AV.
The highest memory location, 3FFFF is the mailbox for the
right port and 3FFFE is the mailbox for the left port. Table 2
shows that in order to set the INTR flag, a Write operation by
the left port to address 3FFFF will assert INTR LOW. At least
one byte has to be active for a Write to generate an interrupt.
A valid Read of the 3FFFF location by the right port will reset
INTR HIGH. At least one byte has to be active in order for a
Read to reset the interrupt. When one port Writes to the other
port’s mailbox, the INT of the port that the mailbox belongs to
is asserted LOW. The INT is reset when the owner (port) of the
mailbox Reads the contents of the mailbox. The interrupt flag
is set in a flow-thru mode (i.e., it follows the clock edge of the
writing port). Also, the flag is reset in a flow-thru mode (i.e., it
follows the clock edge of the reading port).
Each port can read the other port’s mailbox without resetting
the interrupt. And each port can write to its own mailbox
without setting the interrupt. If an application does not require
message passing, INT pins should be left open.
Table 2. Interrupt Operation Example[1, 4, 5, 6, 7]
Left Port
Function
Right Port
R/WL
CEL
A0L–17L
INTL
R/WR
CER
A0R–17R
INTR
Set Right INTR Flag
L
L
3FFFF
X
X
X
X
L
Reset Right INTR Flag
X
X
X
X
H
L
3FFFF
H
Set Left INTL Flag
X
X
X
L
L
L
3FFFE
X
Reset Left INTL Flag
H
L
3FFFE
H
X
X
X
X
Table 3. Address Counter and Counter-Mask Register Control Operation (Any Port)[8, 9]
CLK
MRST
CNT/MSK
CNTRST
ADS
CNTEN
X
L
X
X
X
X
Master Reset
Operation
Reset address counter to all 0s and mask
register to all 1s.
Description
H
H
L
X
X
Counter Reset
Reset counter unmasked portion to all 0s.
H
H
H
L
L
Counter Load
Load counter with external address value
presented on address lines.
H
H
H
L
H
Counter Readback Read out counter internal value on address
lines.
H
H
H
H
L
Counter Increment Internally increment address counter value.
H
H
H
H
H
Counter Hold
Constantly hold the address value for
multiple clock cycles.
H
L
L
X
X
Mask Reset
Reset mask register to all 1s.
H
L
H
L
L
Mask Load
Load mask register with value presented on
the address lines.
H
L
H
L
H
Mask Readback
Read out mask register value on address
lines.
H
L
H
H
X
Reserved
Operation undefined
Notes:
4. CE is internal signal. CE = LOW if CE0 = LOW and CE1 = HIGH. For a single Read operation, CE only needs to be asserted once at the rising edge of the CLK
and can be deasserted after that. Data will be out after the following CLK edge and will be three-stated after the next CLK edge.
5. OE is “Don’t Care” for mailbox operation.
6. At least one of B0, B1, B2, or B3 must be LOW.
7. A16x is a NC for CY7C0851AV, therefore the Interrupt Addresses are FFFF and EFFF; A16x and A15x are NC for CY7C0850AV, therefore the Interrupt Addresses
are 7FFF and 6FFF.
8. “X” = “Don’t Care,” “H” = HIGH, “L” = LOW.
9. Counter operation and mask register operation is independent of chip enables.
Document #: 38-06070 Rev. *G
Page 7 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Address Counter and Mask Register
Operations[10]
This section describes the features only apply to
CY7C0850AV/CY7C0851AV/CY7C0852AV devices, but not
to the CY7C0853AV device. Each port of these devices has a
programmable burst address counter. The burst counter
contains three registers: a counter register, a mask register,
and a mirror register.
The counter register contains the address used to access the
RAM array. It is changed only by the Counter Load, Increment,
Counter Reset, and by master reset (MRST) operations.
The mask register value affects the Increment and Counter
Reset operations by preventing the corresponding bits of the
counter register from changing. It also affects the counter
interrupt output (CNTINT). The mask register is changed only
by the Mask Load and Mask Reset operations, and by the
MRST. The mask register defines the counting range of the
counter register. It divides the counter register into two
regions: zero or more “0s” in the most significant bits define
the masked region, one or more “1s” in the least significant bits
define the unmasked region. Bit 0 may also be “0,” masking
the least significant counter bit and causing the counter to
increment by two instead of one.
The mirror register is used to reload the counter register on
increment operations (see “retransmit,” below). It always
contains the value last loaded into the counter register, and is
changed only by the Counter Load operation, and by the
MRST.
Table 3 summarizes the operation of these registers and the
required input control signals. The MRST control signal is
asynchronous. All the other control signals in Table 3
(CNT/MSK, CNTRST, ADS, CNTEN) are synchronized to the
port’s CLK. All these counter and mask operations are
independent of the port’s chip enable inputs (CE0 and CE1).
Counter enable (CNTEN) inputs are provided to stall the
operation of the address input and utilize the internal address
generated by the internal counter for fast, interleaved memory
applications. A port’s burst counter is loaded when the port’s
address strobe (ADS) and CNTEN signals are LOW. When the
port’s CNTEN is asserted and the ADS is deasserted, the
address counter will increment on each LOW to HIGH
transition of that port’s clock signal. This will Read/Write one
word from/into each successive address location until CNTEN
is deasserted. The counter can address the entire memory
array, and will loop back to the start. Counter reset (CNTRST)
is used to reset the unmasked portion of the burst counter to
0s. A counter-mask register is used to control the counter
wrap.
Counter Reset Operation
All unmasked bits of the counter are reset to “0.” All masked
bits remain unchanged. The mirror register is loaded with the
value of the burst counter. A Mask Reset followed by a Counter
Reset will reset the counter and mirror registers to 00000, as
will master reset (MRST).
Counter Load Operation
The address counter and mirror registers are both loaded with
the address value presented at the address lines.
Counter Readback Operation
The internal value of the counter register can be read out on
the address lines. Readback is pipelined; the address will be
valid tCA2 after the next rising edge of the port’s clock. If
address readback occurs while the port is enabled (CE0 LOW
and CE1 HIGH), the data lines (DQs) will be three-stated.
Figure 1 shows a block diagram of the operation.
Counter Increment Operation
Once the address counter register is initially loaded with an
external address, the counter can internally increment the
address value, potentially addressing the entire memory array.
Only the unmasked bits of the counter register are incremented. The corresponding bit in the mask register must be
a “1” for a counter bit to change. The counter register is incremented by 1 if the least significant bit is unmasked, and by 2
if it is masked. If all unmasked bits are “1,” the next increment
will wrap the counter back to the initially loaded value. If an
Increment results in all the unmasked bits of the counter being
“1s,” a counter interrupt flag (CNTINT) is asserted. The next
Increment will return the counter register to its initial value,
which was stored in the mirror register. The counter address
can instead be forced to loop to 00000 by externally
connecting CNTINT to CNTRST.[11] An increment that results
in one or more of the unmasked bits of the counter being “0”
will deassert the counter interrupt flag. The example in
Figure 2 shows the counter mask register loaded with a mask
value of 0003Fh unmasking the first 6 bits with bit “0” as the
LSB and bit “16” as the MSB. The maximum value the mask
register can be loaded with is 1FFFFh. Setting the mask
register to this value allows the counter to access the entire
memory space. The address counter is then loaded with an
initial value of 8h. The base address bits (in this case, the 6th
address through the 16th address) are loaded with an address
value but do not increment once the counter is configured for
increment operation. The counter address will start at address
8h. The counter will increment its internal address value till it
reaches the mask register value of 3Fh. The counter wraps
around the memory block to location 8h at the next count.
CNTINT is issued when the counter reaches its maximum
value.
Counter Hold Operation
The value of all three registers can be constantly maintained
unchanged for an unlimited number of clock cycles. Such
operation is useful in applications where wait states are
needed, or when address is available a few cycles ahead of
data in a shared bus interface.
Counter Interrupt
The counter interrupt (CNTINT) is asserted LOW when an
increment operation results in the unmasked portion of the
counter register being all “1s.” It is deasserted HIGH when an
Increment operation results in any other value. It is also
de-asserted by Counter Reset, Counter Load, Mask Reset
and Mask Load operations, and by MRST.
Notes:
10. This section describes the CY7C0852V, which have 17 address bits and a maximum address value of 1FFFF. The CY7C0851V has 16 address bits, register
lengths of 16 bits, and a maximum address value of FFFF. The CY7C0850V has 15 address bits, register lengths of 15 bits, and a maximum address value of 7FFF
11. CNTINT and CNTRST specs are guaranteed by design to operate properly at speed grade operating frequency when tied together.
Document #: 38-06070 Rev. *G
Page 8 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Retransmit
Retransmit is a feature that allows the Read of a block of
memory more than once without the need to reload the initial
address. This eliminates the need for external logic to store
and route data. It also reduces the complexity of the system
design and saves board space. An internal “mirror register” is
used to store the initially loaded address counter value. When
the counter unmasked portion reaches its maximum value set
by the mask register, it wraps back to the initial value stored in
this “mirror register.” If the counter is continuously configured
in increment mode, it increments again to its maximum value
and wraps back to the value initially stored into the “mirror
register.” Thus, the repeated access of the same data is
allowed without the need for any external logic.
Mask Reset Operation
The mask register is reset to all “1s,” which unmasks every bit
of the counter. Master reset (MRST) also resets the mask
register to all “1s.”
Mask Load Operation
The mask register is loaded with the address value presented
at the address lines. Not all values permit correct increment
Document #: 38-06070 Rev. *G
operations. Permitted values are of the form 2n – 1 or 2n – 2.
From the most significant bit to the least significant bit,
permitted values have zero or more “0s,” one or more “1s,” or
one “0.” Thus 1FFFF, 003FE, and 00001 are permitted values,
but 1F0FF, 003FC, and 00000 are not.
Mask Readback Operation
The internal value of the mask register can be read out on the
address lines. Readback is pipelined; the address will be valid
tCM2 after the next rising edge of the port’s clock. If mask
readback occurs while the port is enabled (CE0 LOW and CE1
HIGH), the data lines (DQs) will be three-stated. Figure 1
shows a block diagram of the operation.
Counting by Two
When the least significant bit of the mask register is “0,” the
counter increments by two. This may be used to connect the
CY7C0850AV/CY7C0851AV/CY7C0852AV as a 72-bit single
port SRAM in which the counter of one port counts even
addresses and the counter of the other port counts odd
addresses. This even-odd address scheme stores one half of
the 72-bit data in even memory locations, and the other half in
odd memory locations.
Page 9 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
CNT/MSK
CNTEN
Decode
Logic
ADS
CNTRST
MRST
Bidirectional
Address
Lines
Mask
Register
Counter/
Address
Register
Address
RAM
Decode
Array
CLK
From
Address
Lines
Load/Increment
17
Mirror
1
From
Mask
Register
Increment
Logic
Wrap
17
From
Mask
From
Counter
17
To Readback
and Address
Decode
0
0
17
Counter
1
17
17
Bit 0
+1
Wrap
Detect
1
+2
Wrap
0
1
0
17
To
Counter
Figure 1. Counter, Mask, and Mirror Logic Block Diagram[1]
Document #: 38-06070 Rev. *G
Page 10 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
CNTINT
Example:
Load
Counter-Mask
Register = 3F
H
0 0
0s
216 215
0 1 1
H
X X
Xs
216 215
Max
Address
Register
L
H
1
1
X X
X X
216 215
Unmasked Address
X 0 0
1
0
0
Xs
X 1 1
1
Mask
Register
bit-0
0
26 25 24 23 22 21 20
216 215
Max + 1
Address
Register
1
26 25 24 23 22 21 20
Masked Address
Load
Address
Counter = 8
1
1 1
1
Address
Counter
bit-0
26 25 24 23 22 21 20
Xs
X 0
0
1
0 0
0
26 25 24 23 22 21 20
Figure 2. Programmable Counter-Mask Register Operation[1, 12]
IEEE 1149.1 Serial Boundary Scan (JTAG)[13]
The CY7C0850AV/CY7C0851AV/CY7C0852AV/CY7C0853AV
incorporates an IEEE 1149.1 serial boundary scan test access
port (TAP). The TAP controller functions in a manner that does
not conflict with the operation of other devices using
1149.1-compliant TAPs. The TAP operates using
JEDEC-standard 3.3V I/O logic levels. It is composed of three
input connections and one output connection required by the
test logic defined by the standard.
Performing a TAP Reset
devices, and may be performed while the devices are
operating. An MRST must be performed on the devices after
power-up.
Performing a Pause/Restart
When a SHIFT-DR PAUSE-DR SHIFT-DR is performed the
scan chain will output the next bit in the chain twice. For
example, if the value expected from the chain is 1010101, the
device will output a 11010101. This extra bit will cause some
testers to report an erroneous failure for the devices in a scan
test. Therefore the tester should be configured to never enter
the PAUSE-DR state.
A reset is performed by forcing TMS HIGH (VDD) for five rising
edges of TCK. This reset does not affect the operation of the
Table 4. Identification Register Definitions
Instruction Field
Value
Description
Revision Number (31:28)
0h
Reserved for version number.
Cypress Device ID (27:12)
C001h
Defines Cypress part number for the CY7C0851AV
C002h
Defines Cypress part number for the CY7C0852AV and CY7C0853AV
C092h
Defines Cypress part number for the CY7C0850AV
Cypress JEDEC ID (11:1)
034h
Allows unique identification of the DP family device vendor.
ID Register Presence (0)
1
Indicates the presence of an ID register.
Notes:
12. The “X” in this diagram represents the counter upper bits.
13. Boundary scan is IEEE 1149.1-compatible. See “Performing a Pause/Restart” for deviation from strict 1149.1 compliance
Document #: 38-06070 Rev. *G
Page 11 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Table 5. Scan Registers Sizes
Register Name
Bit Size
Instruction
4
Bypass
1
Identification
32
Boundary Scan
n[14]
Table 6. Instruction Identification Codes
Instruction
Code
Description
EXTEST
0000
Captures the Input/Output ring contents. Places the BSR between the TDI and TDO.
BYPASS
1111
Places the BYR between TDI and TDO.
IDCODE
1011
Loads the IDR with the vendor ID code and places the register between TDI and TDO.
HIGHZ
0111
Places BYR between TDI and TDO. Forces all CY7C0851AV/CY7C0852AV/
CY7C0853AV output drivers to a High-Z state.
CLAMP
0100
Controls boundary to 1/0. Places BYR between TDI and TDO.
SAMPLE/PRELOAD
1000
Captures the input/output ring contents. Places BSR between TDI and TDO.
NBSRST
1100
Resets the non-boundary scan logic. Places BYR between TDI and TDO.
RESERVED
All other codes
Other combinations are reserved. Do not use other than the above.
Note:
14. See details in the device BSDL files.
Document #: 38-06070 Rev. *G
Page 12 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
DC Input Voltage .............................. –0.5V to VDD + 0.5V[16]
Maximum Ratings[15]
Output Current into Outputs (LOW)............................. 20 mA
(Above which the useful life may be impaired. For user guidelines, not tested.)
Static Discharge Voltage........................................... > 2000V
(JEDEC JESD22-A114-2000B)
Storage Temperature ................................ –65°C to + 150°C
Latch-up Current..................................................... > 200 mA
Ambient Temperature with
Power Applied............................................–55°C to + 125°C
Operating Range
Supply Voltage to Ground Potential .............. –0.5V to + 4.6V
Range
DC Voltage Applied to
Outputs in High-Z State..........................–0.5V to VDD + 0.5V
Ambient Temperature
0°C to +70°C
3.3V ± 165 mV
–40°C to +85°C
3.3V ± 165 mV
Commercial
Industrial
VDD
Electrical Characteristics Over the Operating Range
-167
Parameter
Description
-133
-100
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
VOH
Output HIGH Voltage
(VDD = Min., IOH= –4.0 mA)
VOL
Output LOW Voltage
(VDD = Min., IOL= +4.0 mA)
VIH
Input HIGH Voltage
VIL
Input LOW Voltage
IOZ
Output Leakage Current
–10
10
–10
10
IIX1
Input Leakage Current Except TDI, TMS, MRST –10
10
–10
IIX2
Input Leakage Current TDI, TMS, MRST
1.0
–0.1
ICC
Operating Current for
(VDD = Max.,IOUT = 0 mA),
Outputs Disabled
2.4
2.4
0.4
2.0
ISB1
0.4
V
0.8
V
–10
10
µA
10
–10
10
µA
1.0
–0.1
1.0
2.0
2.0
0.8
–0.1
CY7C0850AV
CY7C0851AV
CY7C0852AV
225
V
0.4
V
0.8
300
CY7C0853AV
[18]
2.4
mA
225
300
mA
270
400
200
310
Standby Current (Both Ports TTL Level)
CEL and CER ≥ VIH, f = fMAX
90
115
90
115
90
115
mA
ISB2[18]
Standby Current (One Port TTL Level)
CEL | CER ≥ VIH, f = fMAX
160
210
160
210
160
210
mA
ISB3[18]
Standby Current (Both Ports CMOS Level)
CEL and CER ≥ VDD – 0.2V, f = 0
55
75
55
75
55
75
mA
ISB4[18]
Standby Current (One Port CMOS Level)
CEL | CER ≥ VIH, f = fMAX
160
210
160
210
160
210
mA
ISB5
CY7C0853AV
Operating Current
(VDD = Max, IOUT = 0 mA, f = 0)
Outputs Disabled
70
100
70
100
mA
Capacitance [17]
Part Number
Parameter
Description
Test Conditions
TA = 25°C, f = 1 MHz,
VDD = 3.3V
Max.
Unit
13
pF
10
pF
CY7C0850AV/7C0851AV CIN
/CY7C0852AV
COUT
Input Capacitance
CY7C0853AV
CIN
Input Capacitance
22
pF
COUT
Output Capacitance
20
pF
Output Capacitance
Note:
15. The voltage on any input or I/O pin can not exceed the power pin during power-up.
16. Pulse width < 20 ns.
17. COUT also references CI/O.
18. ISB1, ISB2, ISB3 and ISB4 are not applicable for CY7C0853AV because it can not be powered down by using chip enable pins.
Document #: 38-06070 Rev. *G
Page 13 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
AC Test Load and Waveforms
3.3V
Z0 = 50Ω
R = 50Ω
R1 = 590 Ω
OUTPUT
OUTPUT
C = 10 pF
C = 5 pF
VTH = 1.5V
(a) Normal Load (Load 1)
3.0V
ALL INPUT PULSES
(b) Three-state Delay (Load 2)
90%
90%
10%
10%
VSS
R2 = 435 Ω
< 2 ns
< 2 ns
Switching Characteristics Over the Operating Range
-167
Parameter
Description
-133
-100
CY7C0850AV
CY7C0851AV
CY7C0852AV
CY7C0850AV
CY7C0851AV
CY7C0852AV
CY7C0853AV
CY7C0853AV
Min.
Min.
Min.
Min.
Max.
Max.
Max.
Max.
Unit
100
MHz
fMAX2
Maximum Operating Frequency
tCYC2
Clock Cycle Time
6.0
7.5
7.5
10.0
ns
tCH2
Clock HIGH Time
2.7
3.0
3.0
4.0
ns
tCL2
Clock LOW Time
2.7
3.0
3.0
4.0
ns
[19]
167
133
133
Clock Rise Time
2.0
2.0
2.0
3.0
ns
tF[19]
Clock Fall Time
2.0
2.0
2.0
3.0
ns
tSA
Address Set-up Time
2.3
2.5
2.5
3.0
ns
tHA
Address Hold Time
0.6
0.6
0.6
0.6
ns
tSB
Byte Select Set-up Time
2.3
2.5
2.5
3.0
ns
tHB
Byte Select Hold Time
0.6
0.6
0.6
0.6
ns
tSC
Chip Enable Set-up Time
2.3
2.5
NA
NA
ns
tHC
Chip Enable Hold Time
0.6
0.6
NA
NA
ns
tR
tSW
R/W Set-up Time
2.3
2.5
2.5
3.0
ns
tHW
R/W Hold Time
0.6
0.6
0.6
0.6
ns
tSD
Input Data Set-up Time
2.3
2.5
2.5
3.0
ns
tHD
Input Data Hold Time
0.6
0.6
0.6
0.6
ns
tSAD
ADS Set-up Time
2.3
2.5
NA
NA
ns
tHAD
ADS Hold Time
0.6
0.6
NA
NA
ns
tSCN
CNTEN Set-up Time
2.3
2.5
NA
NA
ns
tHCN
CNTEN Hold Time
0.6
0.6
NA
NA
ns
tSRST
CNTRST Set-up Time
2.3
2.5
NA
NA
ns
tHRST
CNTRST Hold Time
0.6
0.6
NA
NA
ns
tSCM
CNT/MSK Set-up Time
2.3
2.5
NA
NA
ns
tHCM
CNT/MSK Hold Time
0.6
0.6
NA
NA
ns
Note:
19. Except JTAG signals (tr and tf < 10 ns [max.]).
Document #: 38-06070 Rev. *G
Page 14 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Switching Characteristics Over the Operating Range (continued)
-167
Parameter
Description
-133
-100
CY7C0850AV
CY7C0851AV
CY7C0852AV
CY7C0850AV
CY7C0851AV
CY7C0852AV
CY7C0853AV
CY7C0853AV
Min.
Min.
Min.
Min.
Max.
Max.
Max.
Max.
Unit
5.0
ns
5.0
ns
tOE
Output Enable to Data Valid
tOLZ[20, 21]
tOHZ[20, 21]
OE to Low Z
0
OE to High Z
0
tCD2
Clock to Data Valid
4.0
4.4
4.7
5.0
ns
tCA2
Clock to Counter Address Valid
4.0
4.4
NA
NA
ns
tCM2
Clock to Mask Register Readback Valid
NA
ns
tDC
Data Output Hold After Clock HIGH
tCKHZ[20, 21]
tCKLZ[20, 21]
Clock HIGH to Output High Z
0
4.0
0
4.4
0
4.7
0
5.0
ns
Clock HIGH to Output Low Z
1.0
4.0
1.0
4.4
1.0
4.7
1.0
5.0
ns
tSINT
Clock to INT Set Time
0.5
6.7
0.5
7.5
0.5
7.5
0.5
10
ns
tRINT
Clock to INT Reset Time
0.5
6.7
0.5
7.5
0.5
7.5
0.5
10
ns
tSCINT
Clock to CNTINT Set Time
0.5
5.0
0.5
5.7
NA
NA
NA
NA
ns
tRCINT
Clock to CNTINT Reset time
0.5
5.0
0.5
5.7
NA
NA
NA
NA
ns
4.0
4.4
0
4.0
0
4.0
1.0
4.7
0
4.4
0
4.4
1.0
0
4.7
0
NA
1.0
ns
1.0
ns
Port to Port Delays
tCCS
Clock to Clock Skew
5.2
6.0
6.0
8.0
ns
7.0
7.5
7.5
10.0
ns
Master Reset Timing
tRS
Master Reset Pulse Width
tRSS
Master Reset Set-up Time
6.0
6.0
6.0
8.5
ns
tRSR
Master Reset Recovery Time
6.0
7.5
7.5
10.0
ns
tRSF
Master Reset to Outputs Inactive
10.0
10.0
10.0
10.0
ns
tRSCNTINT
Master Reset to Counter Interrupt Flag
Reset Time
10.0
10.0
NA
NA
ns
Notes:
20. This parameter is guaranteed by design, but it is not production tested.
21. Test conditions used are Load 2.
Document #: 38-06070 Rev. *G
Page 15 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
JTAG Timing
167/133/100
Parameter
Description
Min.
Max.
Unit
10
MHz
fJTAG
Maximum JTAG TAP Controller Frequency
tTCYC
TCK Clock Cycle Time
tTH
TCK Clock HIGH Time
40
ns
tTL
TCK Clock LOW Time
40
ns
tTMSS
TMS Set-up to TCK Clock Rise
10
ns
tTMSH
TMS Hold After TCK Clock Rise
10
ns
tTDIS
TDI Set-up to TCK Clock Rise
10
ns
tTDIH
TDI Hold After TCK Clock Rise
10
ns
tTDOV
TCK Clock LOW to TDO Valid
tTDOX
TCK Clock LOW to TDO Invalid
100
ns
30
0
ns
ns
JTAG Switching Waveform
tTH
Test Clock
TCK
tTMSS
tTL
tTCYC
tTMSH
Test Mode Select
TMS
tTDIS
tTDIH
Test Data-In
TDI
Test Data-Out
TDO
Document #: 38-06070 Rev. *G
tTDOX
tTDOV
Page 16 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Switching Waveforms
Master Reset
tRS
MRST
tRSF
ALL
ADDRESS/
DATA
LINES
tRSS
ALL
OTHER
INPUTS
tRSR
INACTIVE
ACTIVE
TMS
CNTINT
INT
TDO
Read Cycle[4, 22, 23, 24, 25]
tCH2
tCYC2
tCL2
CLK
CE
tSC
tHC
tSB
tHB
tSW
tSA
tHW
tHA
tSC
tHC
B0–B3
R/W
ADDRESS
An
DATAOUT
An+1
1 Latency
An+2
tDC
tCD2
Qn
tCKLZ
An+3
Qn+1
tOHZ
Qn+2
tOLZ
OE
tOE
Notes:
22. OE is asynchronously controlled; all other inputs (excluding MRST and JTAG) are synchronous to the rising clock edge.
23. ADS = CNTEN = LOW, and MRST = CNTRST = CNT/MSK = HIGH.
24. The output is disabled (high-impedance state) by CE = VIH following the next rising edge of the clock.
25. Addresses do not have to be accessed sequentially since ADS = CNTEN = VIL with CNT/MSK = VIH constantly loads the address on the rising edge of the CLK.
Numbers are for reference only.
Document #: 38-06070 Rev. *G
Page 17 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Switching Waveforms (continued)
Bank Select Read[26, 27]
tCH2
tCYC2
tCL2
CLK
tHA
tSA
ADDRESS(B1)
A0
A1
A3
A2
A4
A5
tHC
tSC
CE(B1)
tCD2
tHC
tSC
tCD2
tHA
tSA
A0
ADDRESS(B2)
tDC
A1
tCKHZ
Q3
Q1
Q0
DATAOUT(B1)
tCD2
tCKHZ
tDC
tCKLZ
A3
A2
A4
A5
tHC
tSC
CE(B2)
tSC
tCD2
tHC
tCKHZ
DATAOUT(B2)
tCD2
Q4
Q2
tCKLZ
tCKLZ
Read-to-Write-to-Read (OE = LOW)[25, 28, 29, 30, 31]
tCH2
tCYC2
tCL2
CLK
CE
tSC
tHC
tSW
tHW
R/W
tSW
tHW
An
ADDRESS
tSA
An+1
An+2
An+3
An+4
tSD tHD
tHA
DATAIN
An+2
tCD2
tCKHZ
Dn+2
Qn
DATAOUT
tCD2
tCD2
Qn+1
Qn+3
tCKLZ
READ
NO OPERATION
WRITE
READ
Notes:
26. In this depth-expansion example, B1 represents Bank #1 and B2 is Bank #2; each bank consists of one Cypress CY7C0851AV/CY7C0852AV device from this
data sheet. ADDRESS(B1) = ADDRESS(B2).
27. ADS = CNTEN= B0 – B3 = OE = LOW; MRST = CNTRST = CNT/MSK = HIGH.
28. Output state (HIGH, LOW, or high-impedance) is determined by the previous cycle control signals.
29. During “No Operation,” data in memory at the selected address may be corrupted and should be rewritten to ensure data integrity.
30. CE0 = OE = B0 – B3 = LOW; CE1 = R/W = CNTRST = MRST = HIGH.
31. CE0 = B0 – B3 = R/W = LOW; CE1 = CNTRST = MRST = CNT/MSK = HIGH. When R/W first switches low, since OE = LOW, the Write operation cannot be
completed (labelled as no operation). One clock cycle is required to three-state the I/O for the Write operation on the next rising edge of CLK.
Document #: 38-06070 Rev. *G
Page 18 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Switching Waveforms (continued)
Read-to-Write-to-Read (OE Controlled)[25, 28, 30, 31]
tCH2
tCYC2
tCL2
CLK
CE
tSC
tHC
tSW tHW
R/W
ADDRESS
tSW
tHW
An
tSA
An+1
An+2
tHA
An+3
An+4
An+5
tSD tHD
Dn+2
DATAIN
Dn+3
tCD2
DATAOUT
tCD2
tCD2
Qn
Qn+1
Qn+4
tOHZ
OE
READ
Read with Address Counter
tCH2
WRITE
READ
Advance[30]
tCYC2
tCL2
CLK
tSA
ADDRESS
tHA
An
tSAD
tHAD
ADS
tSAD
tHAD
tSCN
tHCN
CNTEN
tSCN
DATAOUT
tHCN
Qx–1
READ
EXTERNAL
ADDRESS
Document #: 38-06070 Rev. *G
tCD2
Qx
tDC
Qn
READ WITH COUNTER
Qn+1
COUNTER HOLD
Qn+2
Qn+3
READ WITH COUNTER
Page 19 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Switching Waveforms (continued)
Write with Address Counter Advance [31]
tCH2
tCYC2
tCL2
CLK
tSA
tHA
An
ADDRESS
INTERNAL
ADDRESS
An
tSAD
tHAD
tSCN
tHCN
An+1
An+2
An+3
An+4
ADS
CNTEN
Dn
DATAIN
tSD
Dn+1
tHD
WRITE EXTERNAL
ADDRESS
Dn+1
WRITE WITH
COUNTER
Dn+2
Dn+3
WRITE COUNTER
HOLD
Dn+4
WRITE WITH COUNTER
Disabled-to-Read-to-Read-to-Read-to-Write
tCL2
tCYC2
tCH2
CLK
tSC
tHC
CE
tSW
tHW
R/W
tSW tHW
An
ADDRESS
tHA
tSA
tHA
tSA
An+1
An+4
An+3
An+2
OE
tSD tHD
DATAIN
Dn+3
tCD2
DATAOUT
Qn
DISABLED
Document #: 38-06070 Rev. *G
READ
READ
Qn+1
READ
Qn+2
WRITE
READ
Page 20 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Switching Waveforms (continued)
Disabled-to-Write-to-Read-to-Write-to-Read
tCYC2
tCH2
tCL2
CLK
tSC tHC
CE
tHW
tSW
R/W
tSA
tHA
ADDRESS
An
An+4
An+3
An+2
An+1
tOE
OE
tSD tHD
DATAIN
Dn
Dn+2
tCD2
Qn+3
Qn+1
DATAOUT
DISABLED
WRITE
READ
READ
WRITE
READ
Disabled-to-Read-to-Disabled-to-Write
tCL2
tCYC2
tCH2
CLK
tSC tHC
CE
R/W
tSW tHW
ADDRESS
tSA
An+4
An+3
An+2
An+1
An
tHA
tOE
OE
tOHZ
tSD tHD
DATAIN
Dn+2
tCD2
DATAOUT
Qn+3
Qn
DISABLED
Document #: 38-06070 Rev. *G
READ
DISABLED
WRITE
READ
READ
Page 21 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Switching Waveforms (continued)
Read-to-Readback-to-Read-to-Read (R/W = HIGH)
tCL2
tCYC2
tCH2
CLK
tHAD
tSAD
ADS
CNTEN
tSCN tHCN
tSA
An+1
ADDRESS
COUNTER
INTERNAL
ADDRESS
tHA
An
An+1
An+2
An+3
An+4
OE
DATAOUT
Qn+1
READ
INCREMENT
Document #: 38-06070 Rev. *G
NO OPERATION
READBACK
INCREMENT
Qn+3
Qn+2
READ
READ
INCREMENT
READ
INCREMENT
Page 22 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Switching Waveforms (continued)
Counter Reset[32, 33]
tCYC2
tCH2 tCL2
CLK
tSA
INTERNAL
ADDRESS
Ax
tSW
tHW
tSD
tHD
An
1
0
Ap
Am
An
ADDRESS
tHA
Ap
Am
R/W
ADS
CNTEN
tSRST tHRST
CNTRST
DATAIN
D0
tCD2
tCD2
[34]
DATAOUT
Q0
COUNTER
RESET
WRITE
ADDRESS 0
tCKLZ
READ
ADDRESS 0
READ
ADDRESS 1
Qn
Q1
READ
ADDRESS An
READ
ADDRESS Am
Notes:
32. CE0 = B0 – B3 = LOW; CE1 = MRST = CNT/MSK = HIGH.
33. No dead cycle exists during counter reset. A Read or Write cycle may be coincidental with the counter reset.
34. Retransmit happens if the counter remains in increment mode after it wraps to initially loaded value.
Document #: 38-06070 Rev. *G
Page 23 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Switching Waveforms (continued)
Readback State of Address Counter or Mask Register[35, 36, 37, 38]
tCYC2
tCH2 tCL2
CLK
tCA2 or tCM2
tSA tHA
EXTERNAL
ADDRESS
A0–A16
An*
An
INTERNAL
ADDRESS
An+1
An
An+2
An+3
An+4
tSAD tHAD
ADS
tSCN tHCN
CNTEN
tCD2
DATAOUT
Qx-1
Qn
READBACK
COUNTER
INTERNAL
ADDRESS
INCREMENT
Qx-2
LOAD
EXTERNAL
ADDRESS
tCKHZ
tCKLZ
Qn+1
Qn+2
Qn+3
Notes:
35. CE0 = OE = B0 – B3 = LOW; CE1 = R/W = CNTRST = MRST = HIGH.
36. Address in output mode. Host must not be driving address bus after tCKLZ in next clock cycle.
37. Address in input mode. Host can drive address bus after tCKHZ.
38. An * is the internal value of the address counter (or the mask register depending on the CNT/MSK level) being Read out on the address lines.
Document #: 38-06070 Rev. *G
Page 24 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Switching Waveforms (continued)
Left_Port (L_Port) Write to Right_Port (R_Port) Read[39, 40, 41]
tCH2
tCYC2
tCL2
CLKL
tHA
tSA
L_PORT
ADDRESS
An
tSW
tHW
R/WL
tCKHZ
tSD
L_PORT
tCKLZ
Dn
DATAIN
CLKR
tHD
tCYC2
tCL2
tCCS
tCH2
R_PORT
ADDRESS
tSA
tHA
An
R/WR
tCD2
R_PORT
Qn
DATAOUT
tDC
Notes:
39. CE0 = OE = ADS = CNTEN = B0 – B3 = LOW; CE1 = CNTRST = MRST = CNT/MSK = HIGH.
40. This timing is valid when one port is writing, and other port is reading the same location at the same time. If tCCS is violated, indeterminate data will be Read out.
41. If tCCS < minimum specified value, then R_Port will Read the most recent data (written by L_Port) only (2 * tCYC2 + tCD2) after the rising edge of R_Port's clock. If
tCCS > minimum specified value, then R_Port will Read the most recent data (written by L_Port) (tCYC2 + tCD2) after the rising edge of R_Port's clock.
Document #: 38-06070 Rev. *G
Page 25 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Switching Waveforms (continued)
Counter Interrupt and Retransmit[34, 42, 43, 44, 45]
tCH2
tCYC2
tCL2
CLK
tSCM
tHCM
CNT/MSK
ADS
CNTEN
COUNTER
INTERNAL
ADDRESS
1FFFC
1FFFD
1FFFE
tSCINT
1FFFF
Last_Loaded
Last_Loaded +1
tRCINT
CNTINT
Notes:
42. CE0 = OE = B0 – B3 = LOW; CE1 = R/W = CNTRST = MRST = HIGH.
43. CNTINT is always driven.
44. CNTINT goes LOW when the unmasked portion of the address counter is incremented to the maximum value.
45. The mask register assumed to have the value of 1FFFFh.
Document #: 38-06070 Rev. *G
Page 26 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Switching Waveforms (continued)
MailBox Interrupt Timing[46, 47, 48, 49, 50]
tCH2
tCYC2
tCL2
CLKL
tSA
L_PORT
ADDRESS
tHA
3FFFF
An+1
An
An+2
An+3
tSINT
tRINT
INTR
tCH2
tCYC2
tCL2
CLKR
tSA
R_PORT
ADDRESS
tHA
Am+1
Am
3FFFF
Am+3
Am+4
Table 7. Read/Write and Enable Operation (Any Port)[1, 8, 51, 52]
Inputs
CE0
CE1
R/W
DQ0 – DQ35
X
H
X
X
High-Z
Deselected
X
X
L
X
High-Z
Deselected
X
L
H
L
DIN
Write
L
L
H
H
DOUT
Read
L
H
X
High-Z
Outputs Disabled
OE
H
CLK
Outputs
X
Operation
Notes:
46. CE0 = OE = ADS = CNTEN = LOW; CE1 = CNTRST = MRST = CNT/MSK = HIGH.
47. Address “3FFFF” is the mailbox location for R_Port of a 9M device.
48. L_Port is configured for Write operation, and R_Port is configured for Read operation.
49. At least one byte enable (B0 – B3) is required to be active during interrupt operations.
50. Interrupt flag is set with respect to the rising edge of the Write clock, and is reset with respect to the rising edge of the Read clock.
51. OE is an asynchronous input signal.
52. When CE changes state, deselection and Read happen after one cycle of latency.
Document #: 38-06070 Rev. *G
Page 27 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Ordering Information
256K × 36 (9M) 3.3V Synchronous CY7C0853AV Dual-Port SRAM
Speed
(MHz)
Ordering Code
Package
Name
133
CY7C0853AV-133BBC
BB172
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Commercial
CY7C0853AV-133BBI
BB172
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Industrial
100
CY7C0853AV-100BBC
BB172
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Commercial
CY7C0853AV-100BBI
BB172
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Industrial
Package Type
Operating
Range
128K × 36 (4M) 3.3V Synchronous CY7C0852AV Dual-Port SRAM
Speed
(MHz)
Ordering Code
Package
Name
167
CY7C0852AV-167BBC
BB172
CY7C0852AV-167AC
133
A176
Package Type
Operating
Range
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Commercial
176-pin Flat Pack 24 mm × 24 mm (TQFP)
Commercial
CY7C0852AV-133BBC
BB172
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Commercial
CY7C0852AV-133BBI
BB172
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Industrial
CY7C0852AV-133AC
A176
176-pin Flat Pack 24 mm × 24 mm (TQFP)
Commercial
CY7C0852AV-133AI
A176
176-pin Flat Pack 24 mm × 24 mm (TQFP)
Industrial
64K × 36 (2M) 3.3V Synchronous CY7C0851AV Dual-Port SRAM
Speed
(MHz)
Ordering Code
Package
Name
167
CY7C0851AV-167BBC
BB172
CY7C0851AV-167AC
133
A176
Package Type
Operating
Range
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Commercial
176-pin Flat Pack 24 mm × 24 mm (TQFP)
Commercial
CY7C0851AV-133BBC
BB172
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Commercial
CY7C0851AV-133BBI
BB172
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Industrial
CY7C0851AV-133AC
A176
176-pin Flat Pack 24 mm × 24 mm (TQFP)
Commercial
CY7C0851AV-133AI
A176
176-pin Flat Pack 24 mm × 24 mm (TQFP)
Industrial
32K × 36 (1M) 3.3V Synchronous CY7C0850AV Dual-Port SRAM
Speed
(MHz)
Ordering Code
Package
Name
167
CY7C0850AV-167BBC
BB172
133
CY7C0850AV-133BBC
BB172
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Commercial
CY7C0850AV-133BBI
BB172
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Industrial
CY7C0850AV-133AC
A176
176-pin Flat Pack 24 mm × 24 mm (TQFP)
Commercial
CY7C0850AV-133AI
A176
176-pin Flat Pack 24 mm × 24 mm (TQFP)
Industrial
CY7C0850AV-167AC
Document #: 38-06070 Rev. *G
A176
Package Type
Operating
Range
172-ball Grid Array 15 mm × 15 mm with 1.0-mm pitch (BGA) Commercial
176-pin Flat Pack 24 mm × 24 mm (TQFP)
Commercial
Page 28 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Package Diagrams
176-lead Thin Quad Flat Pack (24 × 24 × 1.4 mm) A176
51-85132-**
Document #: 38-06070 Rev. *G
Page 29 of 31
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Package Diagrams (continued)
172-Ball FBGA (15 x 15 x 1.25 mm) BB172
51-85114-*B
FLEx36 is a trademark of Cypress Semiconductor Corporation. All products and company names mentioned in this document
may be the trademarks of their respective holders.
Document #: 38-06070 Rev. *G
Page 30 of 31
© Cypress Semiconductor Corporation, 2005. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use
of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be
used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its
products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress
products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.
CY7C0850AV/CY7C0851AV
CY7C0852AV/CY7C0853AV
Document History Page
Document Title: CY7C0850AV/CY7C0851AV/CY7C0852AV/CY7C0853AV FLEx36™ 3.3V 32K/64K/128K/256K x 36 Synchronous Dual-Port RAM
Document Number: 38-06070
REV.
ECN NO.
Issue
Date
Orig. of
Change
**
127809
08/04/03
SPN
This data sheet has been extracted from another data sheet: the 2M/4M/9M
data sheet. The following changes have been made from the original as
pertains to this device:
Updated capacitance values
Updated “Read-to-Write-to-Read (OE Controlled)” waveform
Revised static discharge voltage
Corrected 0853 pins L3 and L12
Added discussion of Pause/Restart for JTAG boundary scan
Power up requirements added to Maximum Ratings information
Revise tcd2, tOE, tOHZ, tCKHZ, tCKLZ for the CY7C0853V to 4.7 ns
Updated Icc numbers
Updated tHA, tHB, tHD for -100 speed
Separated out from the 4M data sheet
Added 133-MHz Industrial device to Ordering Information table
YDT
Changed mailbox addresses from 1FFFE and 1FFFF to 3FFFE and 3FFFF.
Description of Change
*A
210948
See ECN
*B
216190
See ECN
*C
231996
See ECN
YDT
Removed “A particular port can write to a certain location while another port
is reading that location.” from Functional Description.
*D
238938
See ECN
WWZ
Merged 0853 (9Mx36) with 0852 (4Mx36) and 0851(2Mx36), add 0850 (1M
x36), to the data sheet.
Added product selection table.
Added JTAG ID code for 1M device.
Added note 14.
Updated boundary scan section.
Updated function description for the merge and addition.
*E
329122
See ECN
SPN
Updated Marketing part numbers
*F
389877
See ECN
KGH
Updated Read-to-Write-to-Read timing diagram to reflect accurate bus
turnaround scheme.
Added ISB5
Changed tRSCNTINT to 10ns
Changed tRSF to 10ns
Added figure Disabled-to-Read-to-Read-to-Read-to-Write
Added figure Disabled-to-Write-to-Read-to-Write-to-Read
Added figure Disabled-to-Read-to-Disabled-to-Write
Added figure Read-to-Readback-to-Read-to-Read (R/W = HIGH)
Updated Read-to-Write-to-Read timing diagram to correct the data out
schemes
Updated Disabled-to-Read-to-Read-to-Read-to-Write timing diagram to
correct the chip enable, data in, and data out schemes
Updated Disabled-to-Write-to-Read-to-Write-to-Read timing diagram to
correct the chip enable and output enable schemes
Updated Disabled-to-Read-to-Disabled-to-Write timing diagram to correct
the chip enable and output enable schemes
*G
391597
See ECN
SPN
Updated counter reset section to reflect mirror register behavior
Document #: 38-06070 Rev. *G
YDT/Dcon Corrected Revision of Document. CMS does not reflect this rev change
Page 31 of 31
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