W90220F Winbond Electronics Corp America, W90220F Datasheet - Page 77

• Manufacturer Part Number: W90220F
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

The above information is the exclusive intellectual property of Winbond Electroncs Corp. and shall not be dsiclosed or distributed or reproduced without permission from
Winbond.
77
6.3
6.3.1 Memory controller
*3 : Inputs with internal pull-up resistor include : PREQ#[0:1], SERR#, INTA#, INTB#, INTC#, INTD#,
AC Specifications
Fig 6.3.1-1 : DRAM AC Timimg
RAS3# - RAS0#
CAS3# - CAS0#
Fig 6..3.1-2 Flash ROM Write Timimg
Pins of 6mA sink capability include :
Pins of 8mA sink capability include :
Symbol
t rv1
t rv2
t cv1
t cv2
t wv
t ds
t dh
t av
MD31 - MD0
MA11 - MA0
PCLK
WE#
RAS# valid delay ref. to PCLK rising
RAS# valid delay ref. to PCLK rising
CAS# valid delay ref. to PCLK rising
RAS# valid delay ref. to PCLK rising
WE# valid delay ref. to PCLK rising
Memory data setup time
Memory data hold time
Memory address valid delay
t wv
Parameter
t rv1
SOUT1, SOUT2.
nAutoFd, nStrob, SelectIn, nInit, SDO, MD[0:31], DD[0:7],
PCICLK, SCLK, SYNC.
C/BE[0:3], PDA[0:31], STOP#, PERR#, TRDY#, DEVSEL#,
FRAME#, IRDY#, PPAR.
t cv1
t av
RAS#[0:3], RCS#[0:3], ROM_OE#, ROM_RW#, IOR, IOW,
CAS#[0:3], MA[0:11], WE#, PCIRST, GNT#[0:1], ED[0:7],
CTS1#, DSR1#, RI1#, DCD1#.
t ds t dh
Min
t rv2
t cv2
Max
W90220F
Unit
ns
ns
ns
ns
ns
ns
ns
ns
Version 0.84