Intel 8xC251TB - Manual (Page 19)

13
8xC251Tx Hardware Description
Table 13 shows the effect of programming EDF# and WSB#[1:0] on the extended data float timing feature as
well as the insertion of wait states for region 01:. It should be noted that enabling the extended data float
timing allows region 01: to have 1 or 3 wait states inserted (depending on WSB#[1:0]) but not 0 or 2 wait
states.
The external user configuration cycle (UCONF = 1 and EA# = 0) will be executed with the extended TRHDZ1
timing bus cycle.
Table 13. Summary of the EDF# and WSB#[1:0] Configuration Options
EDF# WSB#[1:0] Wait State
Extended Data Float
Timings
1 11 0 No
1 10 1 No
1 01 2 No
1 00 3 No
0 11 1 Yes
0 10 1 Yes
0 01 3 Yes
0 00 3 Yes