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MC68HC05V12 Datasheet, PDF (230/246 Pages) Freescale Semiconductor, Inc – HCMOS Microcontreller Unit
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Freescale Semiconductor, Inc.
Electrical Specifications
17.7 Control Timing
Characteristic(1)
Symbol
Min
Max Unit
Frequency of operation
Crystal oscillator option
External clock source
fOSC
0.1
4.2
MHz
dc
4.2
Internal operating frequency
Crystal (fOSC /2)
External clock (fOSC /2)
Cycle time (1/fOP)
Crystal oscillator startup time (crystal oscillator option)
Stop recovery startup time (crystal oscillator option)
RESET pulse width low
See Figure 5-2. Reset and POR Timing Diagram
fOP
tCYC
tOXON
tILCH
tRL
—
2.1
MHz
dc
2.1
476
—
ns
—
100
ms
—
100
ms
120
—
ns
Interrupt pulse width low (edge-triggered)
Interrupt pulse period(2)
tILIH
120
—
ns
tILIL
Note 2
—
tCYC
Port C interrupt pulse width high (edge-triggered)
Port C interrupt pulse period(2)
tILHI
tIHIH
120
Note 2
—
ns
—
tCYC
OSC1 pulse width
tOSC1
90
—
ns
EEPROM programming time per byte
tEEPGM
10
—
ms
EEPROM erase time per byte
tEBYT
10
—
ms
EEPROM erase time per block
tEBLOCK
10
—
ms
EEPROM bulk erase time
tEBULK
10
—
ms
EEPROM programming voltage discharge period
tFPV
—
10.0
µs
RC oscillator stabilization time
tRCON
—
5
tCYC
16-bit timer
Resolution(3)
Input capture pulse width
Input capture period(4)
tRESL
tTH, tTL
tTLTL
4.0
85
Note 4
__
tCYC
__
ns
__
tCYC
1. VDD = 5.0 Vdc, VSS = 0 Vdc, TA = –40°C to +85°C, unless otherwise noted.
2. The minimum period, tILIL or tIHIH, should not be less than the number of cycles it takes to execute the interrupt service
routine plus 19 tCYC.
3. The 2-bit timer prescaler is the limiting factor in determining timer resolution.
4. The minimum period, tTLTL, should not be less than the number of cycles it takes to execute the capture interrupt service
routine plus 24 tCYC.
Technical Data
Electrical Specifications
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MC68HC05V12 — Rev. 2.0
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