ST10 STMICROELECTRONICS [STMicroelectronics], ST10 Datasheet - Page 59

• Manufacturer Part Number: ST10
• Description: 16-BIT MCU WITH 32K BYTE ROM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

XX - ELECTRICAL CHARACTERISTICS (continued)
Figure 22 : CLKOUT and READY
Notes 1. Cycle as programmed, including MCTC waitstates (Example shows 0 MCTC WS).
2. The leading edge of the respective command depends on RW-delay.
3. READY sampled HIGH at this sampling point generates a READY controlled wait state, READY sampled LOW at this sampling
point terminates the currently running bus cycle.
4. READY may be deactivated in response to the traili ng (rising) edge of the corresponding command (RD or WR).
5. If the Asynchronous 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
to the command (see Note 4)).
6. Multiplexed bus modes have a MUX waitstate added after a bus cycle, and an additional MTTC waitstate may be inserted here.
For a multiplexed bus with MTTC waitstate this delay is 2 CLKOUT cycles, for a demultiplexed bus without MTTC waitstate this delay
is zero.
7. The next external bus cycle may start here.
Command
READY
READY
CLKOUT
RD, WR
Async
Sync
ALE
t
t
58
32
3)
Running cycle 1)
t
t
t
59
30
34
37
2)
in order to be safely synchronized. This is guaranteed, if READY is removed in response
t
t
33
31
t
t
35
58
5)
3)
t
37
3)
t
t
36
59
t
29
t
35
waitstate
READY
3)
t
36
MUX/Tristate 6)
t
60 4)
6)
7)
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