MC68HC705X32CFU Freescale Semiconductor, MC68HC705X32CFU Datasheet - Page 102

• Manufacturer Part Number: MC68HC705X32CFU
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705X32CFU

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 4MHz
• Interface Type: SCI
• Program Memory Type: EPROM
• Program Memory Size: 32KB
• Total Internal Ram Size: 528Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 1
• 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: 64
• Package Type: PQFP
• Lead Free Status / Rohs Status: Supplier Unconfirmed

6
Note:
Note:
flag and TCMP1,2
Compare register
timer clocks
timer clocks
Output compare
Output compare
processor clock
processor clock
Timer overflow
The CPU write to the compare registers may take place at any time, but a compare only occurs at timer state
T01. Thus a four cycle difference may exist between the write to the compare register and the actual compare.
Internal
Internal
The timer overflow flag is set at timer state T11 (transition of counter from $FFFF to $0000). It is cleared by
a read of the timer status register during the internal processor clock high time, followed by a read of the
counter low register.
Internal
Internal
counter
register
counter
Figure 6-4 Timer state timing diagram for output compare
16-bit
16-bit
Freescale Semiconductor, Inc.
latch
Figure 6-5 Timer state timing diagram for timer overflow
flag
T00
T01
T10
T11
T00
T01
T10
T11
For More Information On This Product,
CPU writes $F457
Go to: www.freescale.com
PROGRAMMABLE TIMER
$FFFF
$F456
(Note 1)
(Note 1)
(Note 2)
$F457
$0000
$F458
$0001
$F457
$F459
$0002
MC68HC05X16
Rev. 1