Table 5-39 XHOLD/XHOLDA Timing Requirements (XCLKOUT = 1/2 XTIMCLK)(1)(2)(3)
|
MIN |
MAX |
UNIT |
| td(HL-HiZ) |
Delay time, XHOLD low to Hi-Z on all Address, Data, and Control |
|
4tc(XTIM) + tc(XCO) |
ns |
| td(HL-HAL) |
Delay time, XHOLD low to XHOLDA low |
|
4tc(XTIM) + 2tc(XCO) |
ns |
| td(HH-HAH) |
Delay time, XHOLD high to XHOLDA high |
|
4tc(XTIM) |
ns |
| td(HH-BV) |
Delay time, XHOLD high to Bus valid |
|
6tc(XTIM) |
ns |
(1) When a low signal is detected on XHOLD, all pending XINTF accesses will be completed before the bus is placed in a high-impedance state.
(2) The state of XHOLD is latched on the rising edge of XTIMCLK.
(3) After the XHOLD is detected low or high, all bus transitions and XHOLDA transitions will occur with respect to the rising edge of XCLKOUT. Thus, for this mode where XCLKOUT = 1/2 XTIMCLK, the transitions can occur up to 1 XTIMCLK cycle earlier than the maximum value specified.