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4.0 Electrical Specifications (Continued)
Slow Buffered Write of IMEM (Notes 1,2)
Symbol 10# Parameter Formula Min Max Units
tSU-RW-CO 1 RAE, REM-WR Falling before ClK-OUT Rising 14 ns
tH-RW-X 2 RAE, REM-WR Rising before ClK-OUT Rising 0 ns
tSU-CMD-CO 3 CMD Valid before ClK-OUT Falling 0 ns
tH-CMD-CO 4 CMD Invalid after ClK-OUT Falling 35 ns
tpD-RW-X 5 RAE, REM-WR Falling to XACK Falling 40 ns
tZA-LCL-AAD 6 A, AD Disabled before lCl Rising 2 ns
tAZ-LCL-AAD 7 A, AD Enabled before lCl Falling 17 ns
tPD-LCL -IA-b 8 lCl Falling to Next IA Valid T+ -32 0 ns
tPD-IWR-X 9 IWR Falling before XACK Rising (nIW+1)T+ -28 ns
tPD-RR-IWR-b 10 REM-WR, RAE Rising to IWR Rising 8 ns
tZA-IWR-I-b 11 IWR Falling to I Enabled 0 ns
tAZ-IWR-I-b 12 IWR Rising to I Disabled 28 51 ns
tPD-I-IWR-b 13 I Valid before IWR Rising (nIW+1)T+ -8 ns
tW-IWR-b 14 IWR low (nlw+1)T+ -1 ns
Note 1: All parameters are individually tested and guaranteed. Interpreting this data by numerically adding two or more parameters to create a new timing
specification may lead to invalid results.
Note 2: Two remote writes to instruction memory are necessary to store a 16-bit instruction word to IMEM-Iow byte followed by high byte. The timing for the 2nd
write is shown in this diagram. The timing of the first write is the same as a write of the PC or RIC.
......
Slow Buffered Write of IMEM
RAE--
0n°
~
CMoW/A: ~~~$~.@"/.Z
-- 1--0 -- CD --
REM-WR ---,
-0..:1
XACK \
La: ~
WRITE
AO,A
--I --0 -I --0
r-1-\
~ f-I
-0..:1
-1 ~ =t®
IA r-
I
IWR
@i
@
@
TL/F/9336-73
2-84