MC68HC812A4 Datasheet, PDF (129/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

INTERNAL
E-CLOCK
CS
STRETCHED
ECLK PIN
INTERNAL
E-CLOCK
CS
STRETCHED
ECLK PIN
Memory Expansion and Chip-Select
Chip-Select Stretch
STRETCHED BY 2 CYCLES
Figure 8-5. Chip-Select with 2-Cycle Stretch
STRETCHED BY 3 CYCLES
Figure 8-6. Chip-Select with 3-Cycle Stretch
The external E-clock may be the stretched E-clock, the E-clock, or no
clock depending on the selection of control bits ESTR and IVIS in the
MODE register and NECLK in the PEAR register.
Advance Information
MOTOROLA
Memory Expansion and Chip-Select
MC68HC812A4 — Rev. 3.0
129