參數(shù)資料
型號(hào)： MC68HC05P8EVS
廠商： Motorola, Inc.
英文描述： HCMOS MICROCONTROLLER UNIT
中文描述： HCMOS微控制器
文件頁數(shù)： 73/82頁
文件大?。?/td> 327K
代理商： MC68HC05P8EVS
MC68HC705J2
Rev. 2
ELECTRICAL SPECIFICATIONS
MOTOROLA
11-7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
11.6 Control Timing (V
DD
= 5.0 Vdc)
NOTES:
1. The 2-bit timer prescaler is the limiting factor in determining timer resolution.
2. The minimum period t
ILIL
should not be less than the number of cycle times it takes to execute the
interrupt service routine plus 19 t
cyc
.
Figure 11-6. External Interrupt Timing
Table 11-5. Control Timing (V
DD
= 5.0 Vdc)
(V
DD
= 5.0 Vdc ± 10%, V
SS
= 0 Vdc; T
A
= T
L
to T
H
)
Characteristic
Oscillator Frequency
Crystal Option
External Clock Option
Internal Operating Frequency
Crystal (f
osc
÷
2)
External Clock (f
osc
÷
2)
Cycle Time
RESET Pulse Width
Timer Resolution (NOTE 1)
Interrupt Pulse Width Low (Edge-Triggered)
Interrupt Pulse Period
OSC1 Pulse Width
Programming Time per Byte
Symbol
Min
Max
Unit
f
osc
—
dc
4.2
4.2
MHz
f
op
—
dc
480
1.5
4.0
125
2.1
2.1
—
—
—
—
—
—
—
MHz
t
cyc
t
RL
t
RESL
t
ILIH
t
ILIL
t
OH
, t
OL
t
EPGM
ns
t
cyc
t
cyc
ns
t
cyc
ns
ms
(NOTE 2)
90
4
1
IRQ
IRQ
IRQ (PIN)
IRQ (MCU)
t
ILIH
t
ILIL
t
ILIH
NORMALLY
USED WITH
WIRED–OR
CONNECTION
Edge and Level-Sensitive Trigger — If IRQ remains low after interrupt is serviced, the next interrupt is recognized.
Edge-Sensitive Trigger — The minimum tILIH is either 125 ns (VDD = 5 V) or 250 ns (VDD = 3 V). The period tILIL
should not be less than the number of tcyc cycles it takes to execute the interrupt service routine plus 19 tcyc cycles.
n
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