ST9040C6 데이터 시트보기 (PDF) - STMicroelectronics
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ST9040C6 Datasheet PDF : 56 Pages
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ST9040
HANDSHAKE TIMING TABLE (VDD = 5V ± 10%, TA = –40°C to +85°C, Cload = 50pF, INTCLK = 12MHz,
Push-pull output configuration, unless otherwise specified)
Value (Note)
N° Symbol
Parameter
OSCIN Divided
By 2
OSCIN Not Divided
By 2
Min .
Max.
Min.
Max.
1 TwRDY
RDRDY, WRRDY Pulse
Width in One Line
Handshake
2TpC
(P+W+1) –18
TpC
(P+W+1) –
18
Min. Max. Unit
65
ns
2 TwSTB
RDSTB, WRSTB Pulse
Width
2TpC+12
TpC+12
95
ns
3
TdST
(RDY)
RDSTB, or WRSTB ↑
to RDRDY or WRRDY ↓
TpC+45
(TpC-TwCL)
+45
87 ns
4
TsPD
(RDY)
Port Data to RDRDY ↑ (2P+2W+1)
Set-up Time
TpC –25
TwCH+
(W+P)
TpC –25
16
ns
5
TsPD
(RDY)
Port Data to WRRDY ↓
Set-up Time in One Line
Handshake
43
43
43
ns
Port Data to WRRDY ↓
6
ThPD
(RDY)
Hold
Time in One Line
0
Handshake
0
0
ns
7
TsPD
(STB)
Port Data to WRSTB ↑
Set-up Time
10
10
10
ns
8
ThPD
(STB)
Port Data to WRSTB ↑
Hold Time
25
25
25
ns
TdSTB
RDSTBD ↑ to Port Data
9 (PD)
Delay Time in
Bidirectional Handshake
35
35
35 ns
10
TdSTB
(PHZ)
RDSTB ↑ to Port High-Z
Delay Time in
Bidirectional Handshake
25
25
25 ns
Note: The value in the left hand two columns show the formula used to calculate the timing minimum or maximum from the oscillator clock
period, prescale value and number of wait cycles inserted.
The value in the right hand two columns show the timing minimum and maximum for an external clock at 24 MHz divided by 2, prescaler value
of zero and zero wait status.
Legend:
P = Clock Prescaling Value (R235.4,3,2)
W = Programmable Wait Cycles (R252.2.1.0/5,4,3) + External Wait Cycles
19/56
®
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