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ST10R172L Datasheet(PDF) 58 Page - STMicroelectronics

Part # ST10R172L
Description  16-BIT LOW VOLTAGE ROMLESS MCU
PDF  68 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10R172L Datasheet(HTML) 58 Page - STMicroelectronics

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ST10R172L - ELECTRICAL CHARACTERISTICS
1
Cycle as programmed, including MCTC waitstates (Example shows 0 MCTC WS).
2
The leading edge of the respective command depends on RW-delay.
3READY (or READY) sampled HIGH (resp. LOW) at this sampling point generates a
READY controlled waitstate, READY (resp. READY) sampled LOW (resp. HIGH) at this
sampling point terminates the currently running bus cycle.
4READY (resp. READY) may be deactivated in response to the trailing (rising) edge of the
corresponding command (RD or WR).
5
If the Asynchronous READY (or READY) signal does not fulfill the indicated setup and
hold times with respect to CLKOUT (e.g. because CLKOUT is not enabled), it must fulfill t
37 in order to be safely synchronized. This is guaranteed, if READY is removed in
response to the command (see Note 4)).
Figure 21 CLKOUT and READY/READY
Sync
READY
t35
t36
t35
t36
Async
READY
t58
t59
t58
t59
t37
3)
3)
5)
t60
4)
see 6)
3)
3)
CLKOUT
ALE
t30
t34
Sync
READY
t35
t36
t35
t36
Async
READY
t58
t59
t58
t59
waitstate
READY
MUX/Tristate 6)
t32
t33
t29
Running cycle 1)
t31
t37
3)
3)
5)
Command
RD, WR
t60
4)
2)
7)
3)
3)
1



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