Fujitsu MHW2040AC User Manual download pdf (Page 228)

Interface

5.6.3.2 Ultra DMA data burst timing requirements

Table 5.29 Ultra DMA data burst timing requirements (1 of 2)

NAME MODE 0

(in ns)

MODE 1

(in ns)

MODE 2

(in ns)

MODE 3

(in ns)

MODE 4

(in ns)

MODE 5

(in ns)

COMMENT

MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX

2CYCTYP

240 160 120 90 60 40 Typical sustained average two

cycle time

CYC

112 73 54 39 25 16.8 Cycle time allowing for

asymmetry and clock variations

(from STROBE edge to STROBE

edge)

2CYC

230 153 115 86 57 38 Two cycle time allowing for clock

variations (from rising edge to

next rising edge or from falling

edge to next falling edge of

STROBE)

15 10 7 7 5 4 Data setup time at recipient (from

data valid until STROBE edge)

(*2), (*5)

5 5 5 5 5 4.6 Data hold time at recipient (from

STROBE edge until data may

become invalid) (*2), (*5)

DVS

70 48 31 20 6.7 4.8 Data valid setup time at sender

(from data valid until STROBE

edge) (*3)

DVH

6.2 6.2 6.2 6.2 6.2 4.8 Data valid hold time at sender

(from STROBE edge until data

may become invalid) (*3)

15 10 7 7 5 5 CRC word setup time at device

(*2)

5 5 5 5 5 5 CRC word hold time device (*2)

CVS

70 48 31 20 6.7 10 CRC word valid setup time at host

(from CRC valid until DMACK-

negation) (*3)

CVH

6.2 6.2 6.2 6.2 6.2 10 CRC word valid hold time at

sender (from DMACK-negation

until CRC may become invalid)

(*3)

ZFS

0 0 0 0 0 35 Time from STROBE output

released-to-driving until the first

transition of critical timing

DZFS

70 48 31 20 6.7 25 Time from data output released-to-

driving until the first transition of

critical timing

230 200 170 130 120 90 First STROBE time (for device to

first negate DSTROBE from

STOP during a data in burst)

5-152 C141-E258

1 2 ... 223 224 225 226 227 228 229 230 231 232 233 ... 277 278

Comments to this Manuals

No comments

Fujitsu MHW2040AC User Manual Page 228

Comments to this Manuals

Related products and manuals for Internal hard drives Fujitsu MHW2040AC