MB89623 Datasheet, PDF (38/61 Pages) Fujitsu Component Limited. – 8-bit Proprietary Microcontroller

MB89620 Series
(8) Bus Write Timing
Parameter
Symbol
(VCC = +5.0 V±10%, FC = 10 MHz, AVSS = VSS= 0.0 V, TA = –40°C to +85°C)
Value
Pin
Condition
Unit Remarks
Min.
Max.
Valid address → ALE ↓ time tAVLL
AD7 to AD0,
ALE, A15 to A08
1/4 tinst*¹â€“ 64 ns
—
µs
ALE ↓ time → address
invalid time
tLLAX
AD7 to AD0,
ALE, A15 to A08
5
—
ns
Valid address → WR ↓ time tAVWL
WR, ALE
1/4 tinst*¹â€“ 60 ns
—
µs
WR pulse width
tWLWH
WR
1/2 tinst*¹â€“ 20 ns
—
µs
Write data → WR ↑ time
tDVWH
AD7 to AD0, WR
1/2 tinst*¹â€“ 60 ns
—
µs
WR ↑ → address invalid time tWHAX
WR, A15 to A08
—
1/4 tinst*¹â€“ 40 ns
—
ns
WR ↑ → data hold time
tWHDX
AD7 to AD0, WR
1/4 tinst*¹â€“ 40 ns
—
µs
WR ↑ → ALE ↑ time
tWHLH
WR, ALE
1/4 tinst*¹â€“ 40 ns
—
µs
WR ↓ → CLK ↑ time
CLK ↓ → WR ↑ time
tWLCH
tCLWH
WR, CLK
1/4 tinst*¹â€“ 40 ns
—
µs
0
—
ns
ALE pulse width
tLHLL
ALE
1/4 tinst*¹â€“ 35 ns*²
—
µs
ALE ↓ → CLK ↑ time
tLLCH
ALE,CLK
1/4 tinst*¹â€“ 30 ns*²
—
µs
*1: For information on tinst, see “(4) Instruction Cycle.”
*2: These characteristics are also applicable to the bus read timing.
CLK
ALE
AD
A
WR
2.4 V
tLHLL
2.4 V
tAVLL
tLLCH
0.8 V
tLLAX
2.4 V 2.4 V
0.8 V 0.8 V
2.4 V
0.8 V
tDVWH
2.4 V
0.8 V
tAVWL
tWLCH
0.8 V
tWLWH
0.8 V
tWHLH
0.8 V
2.4 V
0.8 V
tWHDX
2.4 V
tCLWH
0.8 V
tWHAX
2.4 V
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