HC20K400 Datasheet, PDF (33/36 Pages) Altera Corporation – HardCopy APEX Device Family

Recommended Operating Conditions
Figure 10–2 shows the timing model for bidirectional I/O pin timing.
Figure 10–2. Synchronous Bidirectional Pin External Timing
Dedicated
Clock
OE Register
PRN
DQ
CLRN
Output IOE Register
PRN
DQ
t _XZBIDIR
t _ZXBIDIR
t_OUTCOBIDIR
Bidirectional Pin
CLRN IOE Register
Input Register
PRN
DQ
t_INSUBIDIR
t_INHBIDIR
CLRN
Tables 10–21 and 10–22 describe HardCopy APEX device external timing
parameters.
Table 10–21. HardCopy APEX Device External Timing Parameters Note (1)
Symbol
t_INSU
t_INH
t_OUTCO
t_INSUPLL
t_INHPLL
t_OUTCOPLL
Clock Parameter
Setup time with global clock at IOE register
Hold time with global clock at IOE register
Clock-to-output delay with global clock at IOE output register
Setup time with PLL clock at IOE input register
Hold time with PLL clock at IOE input register
Clock-to-output delay with PLL clock at IOE output register
Conditions
C1 = 35 pF
C1 = 35 pF
Table 10–22. HardCopy APEX Device External Bidirectional Timing Parameters (Part 1 of 2) Note (1)
Symbol
t_INSUBIDIR
t_{INHBI DIR}
t_OUTCOBIDIR
t_{X ZBI DIR}
Parameter
Setup time for bidirectional pins with global clock at LAB-adjacent input
register
Hold time for bidirectional pins with global clock at LAB-adjacent input
register
Clock-to-output delay for bidirectional pins with global clock at IOE
register
Synchronous output enable register to output buffer disable delay
Condition
C1 = 35 pF
C1 = 35 pF
Altera Corporation
September 2008
10–13