English
Language : 

MC68HC705K1 Datasheet, PDF (126/140 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit
◁
Freescale Semiconductor, Inc.
Electrical Specifications
12.10 5.0-Volt Control Timing
Characteristic(1)
Symbol
Min
Max
Unit
Oscillator frequency
3-pin RC oscillator
2-pin RC oscillator
Crystal/ceramic resonator(2)
External clock
(3)
1.2
fOSC
(3)
2.4
0.500
4.0
dc
4.0
MHz
Internal operating frequency (fOSC ÷ 2)
3-pin RC oscillator
2-pin RC oscillator
Crystal/ceramic resonator
External clock
(3)
0.6
fOP
(3)
1.2
MHz
0.250
2.0
dc
2.0
2-pin RC oscillator frequency combined stability(4)
fOSC = 2.0 MHz; VDD = 5.0 Vdc ±10%; TA = –40°C to +85°C
∆fOSC
—
±25
%
fOSC = 2.0 MHz; VDD = 5.0 Vdc ±10%; TA = 0°C to +40°C
—
±20
3-pin RC oscillator frequency combined stability(4)
fOSC = 1.0 MHz; VDD = 5.0 Vdc ±10%; TA = –40°C to +85°C
∆fOSC
—
±15
%
fOSC = 1.0 MHz; VDD = 5.0 Vdc ±10%; TA = 0°C to +40°C
—
±10
Cycle time (1 ÷ fOP)
tCYC
500
—
ns
RC oscillator stabilization time
tRCON
—
1
ms
Crystal oscillator startup time
tOXON
—
100
ms
Stop recovery startup time
tILCH
—
100
ms
RESET pulse width low
tRL
1.5
—
tCYC
Timer resolution(5)
tRESL
4.0
—
tCYC
IRQ interrupt pulse width low (edge-triggered)
tILIH
250
—
ns
IRQ interrupt pulse period
tILIL
(6)
—
tCYC
PA3–PA0 interrupt pulse width high (edge-triggered)
tIHIL
250
—
ns
PA3–PA0 interrupt pulse period
tIHIH
(6)
—
tCYC
OSC1 pulse width
tOH, tOL
200
—
ns
Programming time per byte(7)
tEPGM
10
15
ms
1. VDD = 5.0 Vdc ±10%; VSS –0 Vdc; TA = TL to TH
2. Use only AT-cut crystals.
3. Minimum oscillator frequency with RC oscillator option is limited only by size of external R and C and leakage of external C.
4. Including processing tolerances and variations in temperature and supply voltage. Excluding tolerances of external R
and C.
5. The 2-bit timer prescaler is the limiting factor in determining timer resolution.
6. 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.
7. tEPGM is programming time per byte and may be accumulated during multiple programming passes.
Technical Data
Electrical Specifications
For More Information On This Product,
Go to: www.freescale.com
MC68HC705K1 — Rev. 2.0
 ▷