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ST90R40C6 Datasheet(PDF) 19 Page - STMicroelectronics

Part # ST90R40C6
Description  16K ROM HCMOS MCU WITH EEPROM, RAM AND A/D CONVERTER
PDF  56 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST90R40C6 Datasheet(HTML) 19 Page - STMicroelectronics

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N
°
Symbol
Parameter
Value (Note)
Min. Max. Unit
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
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
↑
Set-up Time
(2P+2W+1)
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
6
ThPD
(RDY)
Port Data to WRRDY
↓
Hold
Time in One Line
Handshake
00
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
9
TdSTB
(PD)
RDSTBD
↑ to Port Data
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
HANDSHAKE TIMING TABLE (VDD =5V
± 10%, TA =–40°Cto +85°C, Cload = 50pF, INTCLK = 12MHz,
Push-pull output configuration, unless otherwise specified)
®
ST9040
19/56



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