ISSUE 4.7 : NOVEMBER 1998
MFM8516 - 70/90/12/15
A.C Waveforms - Alternate CS controlled Program operation timings
Data Polling
5555H
PA
PA
Address
tAS
tGHEL
tAH
tRC
tWC
WE
OE
tCP
tCHP
tWHWH1
CS
tWS
tOE
tDF
tDH
A0H
PD
DOUT
D7
DATA
VCC
tDS
tCE
tOH
NOTES:
1. PA is address of memory location to be programmed.
2. PD is data to be programmed at byte address.
3. D7 is the output of the complement of the data written to the device.
4. DOUT is the output of the data written to the device.
5. Figure indicates last two bus cycles of four bus cycle sequence.
AC Waveforms for Data Polling During Embedded Algorithm Operations
tCH
CS
tDF
tOE
OE
tOEH
WE
tCE
tOH
*
HIGH Z
HIGH Z
D7 =
D7
D7
Valid Data
tWHWH1 OR 2
D0-D6
= Invalid
D0-D6=
Vaild Data
D0-D6
tOE
8
MOSAIC [ MOSAIC ]
