PQI StandardII ICF Card 128MB~8GB WideTemp - Unitronix

Datasheet
Notes: 1) The device may negate DMARQ to request termination of the Ultra DMA burst no sooner than tRP after -DDMARDY is negated.
2) After negating -DDMARDY, the device may receive zero, one, two, or three more data words from the host.
Figure 21: Ultra DMA Data-Out Burst Device Pause Timing
4.11.10 Device Terminating an Ultra DMA Data-Out Burst
The device terminates an Ultra DMA Data-Out burst by following the steps lettered below. The timing diagram for the
operation is shown in Figure 22: Ultra DMA Data-Out Burst Device Termination Timing. The timing parameters are
specified in Table 15: Ultra DMA Data Burst Timing Requirements and are described in Table 16: Ultra DMA Data
Burst Timing Descriptions.
The following steps shall occur in the order they are listed unless otherwise specifically allowed:
a) The device shall not initiate Ultra DMA burst termination until at least one data word of an Ultra DMA burst has been
transferred.
b) The device shall initiate Ultra DMA burst termination by negating -DDMARDY.
c) The host shall stop generating an HSTROBE edges within t RFS of the device negating -DDMARDY.
d) If the device negates -DDMARDY within t SR after the host has generated an HSTROBE edge, then the device shall
be prepared to receive zero or one additional data words. If the device negates -DDMARDY greater than t SR after the
host has generated an HSTROBE edge, then the device shall be prepared to receive zero, one or two additional
data words. The additional data words are a result of cable round trip delay and t RFS timing for the host.
e) The device shall negate DMARQ no sooner than t RP after negating -DDMARDY. The device shall
again until after the Ultra DMA burst is terminated.
not assert DMARQ
f) The host shall assert STOP within t LI after the device has negated DMARQ. The host shall not negate STOP again
until after the Ultra DMA burst is terminated.
g)
If HSTROBE is negated, the host shall assert HSTROBE within t LI after the device has negated DMARQ. No data
shall be transferred during this assertion. The device shall ignore this transition of HSTROBE. HSTROBE shall
remain asserted until the Ultra DMA burst is terminated.
h) The host shall place the result of its CRC calculation on D[15:00]
Rev. A.5 37/45 Mar. 2009