80C196EA Datasheet, PDF (30/46 Pages) Intel Corporation – CHMOS 16-BIT MICROCONTROLLER

8xC196EA — AUTOMOTIVE
Table 9. AC Characteristics, Demultiplexed Bus Mode (Sheet 2 of 2)
Symbol
Parameter
Min
Max
Units
T_CHWH
T_WLWH
T_WHQX
T_WHBX
T_WHAX
T_RHBX
T_RHAX
T_AVYV
T_CLYX
CLKOUT High to WR# Rising Edge
WR# Low to WR# High
Data Hold after WR# Rising Edge
BHE#, INST Hold after WR# High
A20:0, CSx# Hold after WR# High
BHE#, INST Hold after RD# High
A20:0, CSx# Hold after RD# High
A20:0 Valid to READY Setup
READY Hold after CLKOUT Low
–5
3t – 15
t
t
0
t
0
0
10
t + 15
3t – 25
2t – 28
ns (9)
ns (2)
ns
ns
ns
ns
ns
ns (4)
ns
(5, 7,9)
T_YLYH Non READY Time
No Upper Limit
ns
NOTES:
1. 20 MHz is the maximum input frequency when using an external crystal oscillator; however, 40 MHz
can be applied with an external clock source.
2. If wait states are used, add 2t × n, where n = number of wait states.
3. Assuming back-to-back bus cycles.
4. When forcing wait states using the BUSCON register, add 2t × n.
5. Exceeding the maximum specification causes additional wait states.
6. 8-bit bus only.
7. The first falling edge of READY is not synchronized to a CLKOUT edge; therefore, one programmed
wait state is required.
8. Device is static by design but has been tested only down to 20 MHz.
9. Assumes CLKOUT is operating in divide-by-two mode (f/2).
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