ep2a40b724i8 Altera Corporation, ep2a40b724i8 Datasheet - Page 43

• Manufacturer Part Number: ep2a40b724i8
• Description: Programmable Logic Device Family
• Manufacturer: Altera Corporation

Altera Corporation
Figure 28. APEX II IOE in Bidirectional I/O Configuration
Column, Row
Interconnect
or Local
12 Peripheral
Signals
Dedicated
Clocks
Eight
The APEX II IOE includes programmable delays that can be activated to
ensure zero hold times, minimum clock-to-output times, input IOE
register-to-logic array register transfers, or logic array-to-output IOE
register transfers.
Chip-Wide Reset
Register Delay
Logic Array
to Output
Enable Delay
Output Clock
Enable Delay
Input Clock
Output Register
Input Register
OE Register
D
CLRN/PRN
ENA
ENA
CLRN/PRN
CLRN/PRN
D
ENA
D
APEX II Programmable Logic Device Family Data Sheet
Q
Q
Q
Drive Strength Control
Open-Drain Output
Slew Control
t
ZX
Output
Output
Delay
Pin
Delay
Input Register Delay
Logic Array Delay
Input Pin to
Input Pin to
OE Register
t
CO
Delay
VCCIO
VCCIO
Optional
PCI Clamp
Bus-Hold
Circuit
Programmable
Pull-Up
43