CY7C1354C-166AXC Cypress Semiconductor Corp, CY7C1354C-166AXC Datasheet - Page 13

• Manufacturer Part Number: CY7C1354C-166AXC
• Description: IC SRAM 9MBIT 166MHZ 100LQFP
• Manufacturer: Cypress Semiconductor Corp
• Type: Synchronousr

Specifications of CY7C1354C-166AXC

• Memory Size: 9M (256K x 36)
• Package / Case: 100-LQFP
• Format - Memory: RAM
• Memory Type: SRAM - Synchronous
• Speed: 166MHz
• Interface: Parallel
• Voltage - Supply: 3.135 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Access Time: 3.5 ns
• Maximum Clock Frequency: 166 MHz
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 3.135 V
• Maximum Operating Current: 180 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Number Of Ports: 4
• Operating Supply Voltage: 3.3 V
• Memory Configuration: 512K X 18 / 256K X 36
• Clock Frequency: 166MHz
• Supply Voltage Range: 3.135V To 3.6V
• Memory Case Style: TQFP
• No. Of Pins: 100
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 428-2159; CY7C1354C-166AXC

Document Number: 38-05538 Rev. *L
TAP Registers
Registers are connected between the TDI and TDO balls and
enable data to be scanned into and out of the SRAM test
circuitry. Only one register can be selected at a time through
the instruction register. Data is serially loaded into the TDI ball
on the rising edge of TCK. Data is output on the TDO ball on
the falling edge of TCK.
Instruction Register
Three-bit instructions can be serially loaded into the instruction
register. This register is loaded when it is placed between the
TDI and TDO balls as shown in the
Diagram on page
is loaded with the IDCODE instruction. It is also loaded with
the IDCODE instruction if the controller is placed in a reset
state as described in the previous section.
When the TAP controller is in the Capture-IR state, the two
least significant bits are loaded with a binary “01” pattern to
enable fault isolation of the board-level serial test data path.
Bypass Register
To save time when serially shifting data through registers, it is
sometimes advantageous to skip certain chips. The bypass
register is a single-bit register that can be placed between the
TDI and TDO balls. This enables data to be shifted through the
SRAM with minimal delay. The bypass register is set LOW
(V
Boundary Scan Register
The boundary scan register is connected to all the input and
bidirectional balls on the SRAM.
The boundary scan register is loaded with the contents of the
RAM I/O ring when the TAP controller is in the Capture-DR
state and is then placed between the TDI and TDO balls when
the controller is moved to the Shift-DR state. The EXTEST,
SAMPLE/PRELOAD and SAMPLE Z instructions can be used
to capture the contents of the I/O ring.
The tables
and
the order in which the bits are connected. Each bit
corresponds to one of the bumps on the SRAM package. The
MSB of the register is connected to TDI and the LSB is
connected to TDO.
Identification (ID) Register
The ID register is loaded with a vendor-specific, 32-bit code
during the Capture-DR state when the IDCODE command is
loaded in the instruction register. The IDCODE is hardwired
into the SRAM and can be shifted out when the TAP controller
is in the Shift-DR state. The ID register has a vendor code and
other
Definitions on page
TAP Instruction Set
Overview
Eight different instructions are possible with the three-bit
instruction register. All combinations are listed in the
Instruction Codes table. Three of these instructions are listed
as RESERVED and should not be used. The other five
instructions are described in detail in this section.
SS
Boundary Scan Exit Order (512 K × 18) on page 18
) when the BYPASS instruction is executed.
information
Boundary Scan Exit Order (256 K × 36) on page 17
12. Upon power up, the instruction register
15.
described
in
Identification
TAP Controller Block
Register
show
The TAP controller used in this SRAM is not fully compliant to
the 1149.1 convention because some of the mandatory 1149.1
instructions are not fully implemented.
The TAP controller cannot be used to load address data or
control signals into the SRAM and cannot preload the I/O
buffers. The SRAM does not implement the 1149.1 commands
EXTEST
SAMPLE/PRELOAD; rather, it performs a capture of the I/O
ring when these instructions are executed.
Instructions are loaded into the TAP controller during the
Shift-IR state when the instruction register is placed between
TDI and TDO. During this state, instructions are shifted
through the instruction register through the TDI and TDO balls.
To execute the instruction once it is shifted in, the TAP
controller needs to be moved into the Update-IR state.
EXTEST
EXTEST is a mandatory 1149.1 instruction which is to be
executed whenever the instruction register is loaded with all
0s. EXTEST is not implemented in this SRAM TAP controller,
and therefore this device is not compliant to 1149.1. The TAP
controller does recognize an all-0 instruction.
When an EXTEST instruction is loaded into the instruction
register, the SRAM responds as if a SAMPLE/PRELOAD
instruction has been loaded. There is one difference between
the
instruction, EXTEST places the SRAM outputs in a high Z
state.
IDCODE
The IDCODE instruction causes a vendor-specific, 32-bit code
to be loaded into the instruction register. It also places the
instruction register between the TDI and TDO balls and
enables the IDCODE to be shifted out of the device when the
TAP controller enters the Shift-DR state.
The IDCODE instruction is loaded into the instruction register
upon power up or whenever the TAP controller is given a test
logic reset state.
SAMPLE Z
The SAMPLE Z instruction causes the boundary scan register
to be connected between the TDI and TDO balls when the TAP
controller is in a Shift-DR state. It also places all SRAM outputs
into a High-Z state.
SAMPLE/PRELOAD
SAMPLE/PRELOAD is a 1149.1 mandatory instruction. When
the SAMPLE/PRELOAD instructions are loaded into the
instruction register and the TAP controller is in the Capture-DR
state, a snapshot of data on the inputs and output pins is
captured in the boundary scan register.
The user must be aware that the TAP controller clock can only
operate at a frequency up to 20 MHz, while the SRAM clock
operates more than an order of magnitude faster. Because
there is a large difference in the clock frequencies, it is
possible that during the Capture-DR state, an input or output
undergo a transition. The TAP may then try to capture a signal
while in transition (metastable state). This does not harm the
device, but there is no guarantee as to the value that will be
captured. Repeatable results may not be possible.
two
or
instructions.
INTEST
CY7C1354C, CY7C1356C
Unlike
or
the
the
PRELOAD
SAMPLE/PRELOAD
Page 13 of 32
portion
of
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