Jameco Electronics 3000 User Manual
302
Rabbit 3000 Microprocessor
When operating from the 32 kHz oscillator, the same options are available, but the timing
is somewhat different. This is illustrated in the diagrams below for the four different cases.
In these case the chip selects are one clock cycle (of the 32 kHz clock) long.
is somewhat different. This is illustrated in the diagrams below for the four different cases.
In these case the chip selects are one clock cycle (of the 32 kHz clock) long.
Figure B-7. Short Chip Select Timing: 2 kHz, Read Operation
Figure B-8. Short Chip Select Timing: 4 kHz, Read Operation
32KHz
ADDR
DATA
T1
T2
Valid
MEMOExB
MEMCSxB
clock
2KHz ope ratio n
/OEx
/CSx
2 kHz ope ratio n
32 kHz
32 kHz
ADDR
DATA
T1
T2
Valid
/OEx
/CSx
clock
4 kHz operation