English
Language : 

MC908AZ32ACFUE Datasheet, PDF (300/324 Pages) Freescale Semiconductor, Inc – Microcontrollers
◁
Electrical Specifications
25.1.5 Control Timing
Characteristic(1)
Bus Operating Frequency (4.5–5.5 V — VDD Only)
RESET Pulse Width Low
IRQ Interrupt Pulse Width Low (Edge-Triggered)
IRQ Interrupt Pulse Period
16-Bit Timer(3)
Input Capture Pulse Width(4)
Input Capture Period
MSCAN Wake-up Filter Pulse Width(5)
Symbol
fBUS
tRL
tILHI
tILIL
tTH, tTL
tTLTL
tWUP
Min
—
1.5
1.5
Note(2)
2
Note(2)
2
Max
8.4
—
—
—
—
—
5
Unit
MHz
tcyc
tcyc
tcyc
tcyc
μs
1. VDD = 5.0 Vdc ± 0.5v, VSS = 0 Vdc, TA = –40°C to TA(MAX), unless otherwise noted.
2. The minimum period tTLTL or tILIL should not be less than the number of cycles it takes to execute the capture interrupt
service routine plus TBD tcyc.
3. The 2-bit timer prescaler is the limiting factor in determining timer resolution.
4. Refer to Table 18-2. Mode, Edge, and Level Selection, and supporting note.
5. The minimum pulse width to wake up the MSCAN module is guaranteed by design but not tested.
25.1.6 ADC Characteristics
Characteristic(1)
Min
Max
Unit
Comments
Resolution
8
8
Bits
Absolute Accuracy
(VREFL = 0 V, VDDA/VDDAREF = VREFH = 5 V ± 0.5v)
–1
+1
LSB
Includes Quantization
Conversion Range
VREFL
VREFH
V
VREFL = VSSA
Power-Up Time
16
17
μs
Conversion Time Period
Input Leakage(2)
Ports B and D
–1
1
μA
Conversion Time
ADC
16
17
Clock Includes Sampling Time
Cycles
Monotonicity
Inherent within Total Error
Zero Input Reading
00
01
Hex
VIN = VREFL
Full-Scale Reading
FE
FF
Hex
VIN = VREFH
Sample Time(3)
ADC
5
—
Clock
Cycles
Input Capacitance
—
8
pF
Not Tested
ADC Internal Clock
500 k
1.048 M
Hz
Tested Only at 1 MHz
Analog Input Voltage
VREFL
VREFH
V
1. VDD = 5.0 Vdc ± 0.5v, VSS = 0 Vdc, VDDA/VDDAREF = 5.0 Vdc ± 0.5v, VSSA = 0 Vdc, VREFH = 5.0 Vdc ± 0.5v
2. The external system error caused by input leakage current is approximately equal to the product of R source and input
current.
3. Source impedances greater than 10 kΩ adversely affect internal RC charging time during input sampling.
MC68HC908AZ32A Data Sheet, Rev. 2
300
Freescale Semiconductor
 ▷