EP20K100QC208-1 Altera, EP20K100QC208-1 Datasheet - Page 32

• Manufacturer Part Number: EP20K100QC208-1
• Description: APEX 20K
• Manufacturer: Altera

Specifications of EP20K100QC208-1

• Family Name: APEX 20K
• Number Of Usable Gates: 100000
• Number Of Logic Blocks/elements: 4160
• # Registers: 26
• # I/os (max): 159
• Frequency (max): 250MHz
• Process Technology: SRAM
• Operating Supply Voltage (typ): 2.5V
• Logic Cells: 4160
• Ram Bits: 53248
• Device System Gates: 263000
• Operating Supply Voltage (min): 2.375V
• Operating Supply Voltage (max): 2.625V
• Operating Temp Range: 0C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 208
• Package Type: PQFP
• Lead Free Status / Rohs Status: Not Compliant

APEX 20K Programmable Logic Device Family Data Sheet
Figure 20. ESB in Read/Write Clock Mode
Notes to
(1)
(2)
32
wraddress[ ]
rdaddress[ ]
outclocken
inclocken
outclock
Dedicated Clocks
inclock
All registers can be cleared asynchronously by ESB local interconnect signals, global signals, or the chip-wide reset.
APEX 20KE devices have four dedicated clocks.
data[ ]
wren
rden
Figure
(2)
2 or 4
Dedicated Inputs &
Global Signals
20:
4
Read/Write Clock Mode
The read/write clock mode contains two clocks. One clock controls all
registers associated with writing: data input, WE, and write address. The
other clock controls all registers associated with reading: read enable
(RE), read address, and data output. The ESB also supports clock enable
and asynchronous clear signals; these signals also control the read and
write registers independently. Read/write clock mode is commonly used
for applications where reads and writes occur at different system
frequencies.
D
ENA
D
ENA
D
ENA
Figure 20
Q
Q
Q
Note (1)
D
ENA
D
ENA
Generator
shows the ESB in read/write clock mode.
Pulse
Write
Q
Q
Data In
Read Address
Write Address
Read Enable
Write Enable
RAM/ROM
1,024 × 2
2,048 × 1
Data Out
128 × 16
256 × 8
512 × 4
D
ENA
Q
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