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Table 15-9. Microcontroller Meets These Specifications (Continued)
Symbol
T
Address (high byte) Hold after WR# High
WHAX
Minimum time the high byte of the address (when using an 8-bit data bus) is valid after the
microcontroller deasserts WR#.
T
BHE#, INST Hold after WR# High
WHBX
Minimum time these signals are valid after the microcontroller deasserts WR#.
T
WR# High to ALE High
WHLH
Time between the microcontroller deasserting WR# and next ALE pulse. Maximum time the
memory system has to get data off the bus before the next address cycle.
T
Output Data Hold after WR# High
WHQX
Length of time output data is valid on the bus after the microcontroller deasserts WR#.
T
WR# Low to WR# High
WLWH
WR# pulse width.
†
T
XTAL1 High to CLKOUT High or Low
XHCH
T
1/F
1
1
XTAL
XTAL
The period of the frequency on the XTAL1 input (F
T
.
1
XTAL
†
The CLKOUT pin is available only on the 8XC196MC, MD microcontrollers.
Definition
Get other manuals https://www.bkmanuals.com
INTERFACING WITH EXTERNAL MEMORY
). All AC timings are referenced to
1
XTAL
15-35
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