ISSUE 4.7 : NOVEMBER 1998
MFM8516 - 70/90/12/15
A.C Waveforms - Alternate CS controlled Program operation timings
Data Polling
Address
5555H
PA
PA
t
WC
WE
t
AS
t
GHEL
t
AH
t
RC
OE
t
CP
t
CHP
CS
DATA
t
DS
V
CC
t
CE
t
OH
t
WS
A0H
t
WHWH1
t
OE
PD
D7
D
OUT
t
DH
t
DF
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
t
CH
CS
t
OE
OE
t
OEH
WE
D7
t
WHWH1 OR 2
D0-D6
= Invalid
D0-D6=
Vaild Data
t
DF
t
CE
*
D7
t
OH
D7 =
Valid Data
HIGH Z
D0-D6
HIGH Z
t
OE
8
MOSAIC [ MOSAIC ]
