MC68HC711KS2CFN3 Freescale Semiconductor, MC68HC711KS2CFN3 Datasheet - Page 248

• Manufacturer Part Number: MC68HC711KS2CFN3
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC711KS2CFN3

• Cpu Family: HC11
• Device Core Size: 8b
• Frequency (max): 4MHz
• Interface Type: SCI/SPI
• Program Memory Type: ROM
• Program Memory Size: 32KB
• Total Internal Ram Size: 1KB
• # I/os (max): 51
• Number Of Timers - General Purpose: 8
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 68
• Package Type: PLCC
• Lead Free Status / Rohs Status: Not Compliant

Memory Expansion and Chip Selects
11.4.5 Clock Stretching
Technical Data
248
G1DG2
0
0
0
0
1
1
1
1
G1DPC
0
0
1
1
0
0
1
1
G2DPC
0
1
0
1
0
1
0
1
Chip select and bus control signals are synchronized with the external
E clock. To accommodate devices that are slower than the MCU, the
E clock can be stretched when a chip select is asserted so that it remains
high for one to three extra bus cycles. During this stretch, which can
occur only during accesses to addresses in that chip select’s address
range, the other clocks continue running normally, maintaining the
integrity of the timers and baud generators. Each chip select has two
associated bits in the chip-select clock stretch (CSCSTR) register that
set its clock stretching from zero (disabled) to three cycles.
Table 11-8. One Chip Select Driving Another
Freescale Semiconductor, Inc.
When Address is in:
or general 1 or 2 area
or general 1 or 2 area
A valid program area
A valid program area
For More Information On This Product,
Program CS Pin
or general 2 area
or general 1 area
or general 2 area
or general 1 area
A valid program
A valid program
A valid program
A valid program
A valid program
A valid program
Memory Expansion and Chip Selects
is Asserted
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A valid general 2 area
A valid general 2 area
A valid general 2 area
When Address is in:
General 2 CS Pin
or general 1 area
A valid general 2
Never asserted
Never asserted
Never asserted
Never asserted
is Asserted
A valid general 1 area
A valid general 1 area
A valid general 1 area
When Address is in:
General 1 CS Pin
Never asserted
Never asserted
Never asserted
Never asserted
Never asserted
is Asserted
M68HC11K Family
MOTOROLA