參數(shù)資料
型號: P80C851FBA
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: CMOS single-chip 8-bit microcontroller with on-chip EEPROM
中文描述: 8-BIT, 16 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, MO-047AC, SOT-187-2, LCC-44
文件頁數(shù): 16/22頁
文件大?。?/td> 182K
代理商: P80C851FBA
Philips Semiconductors
Product specification
80C851/83C851
CMOS single-chip 8-bit microcontroller
with on-chip EEPROM
1998 Jul 03
16
Table 4.
External Clock Drive XTAL1
VARIABLE CLOCK
f = 1.2 – 16MHz
VARIABLE CLOCK
f = 3.5 – 24MHz
SYMBOL
PARAMETER
MIN
MAX
MIN
MAX
UNIT
t
CLCL
Oscillator clock period
63
833
42
286
ns
t
HIGH
HIGH time
20
t
CLCL
– t
LOW
17
t
CLCL
– t
LOW
ns
t
LOW
LOW time
20
t
CLCL
– t
HIGH
17
t
CLCL
– t
HIGH
ns
t
r
Rise time
20
5
ns
t
f
Fall time
20
5
ns
t
CY
Cycle time
1
0.75
10
0.5
3.43
s
NOTE:
1. t
CY
= 12 t
CLCL
.
V
DD
–0.5
0.45V
0.7V
DD
0.2V
DD
–0.1
t
CHCL
t
CLCL
t
CLCH
t
CLCX
t
CHCX
Figure 8. External Clock Drive
2.4V
0.45V
2.0V
0.8V
NOTE:
AC inputs during testing are driven at 2.4V for a logic ‘1’ and 0.45V for a logic ‘0’.
Timing measurements are made at 2.0V min for a logic ‘1’ and 0.8V for a logic ‘0’.
Figure 9. AC Testing Input/Output
V
LOAD
V
LOAD
+0.1V
V
LOAD
–0.1V
V
OH
–0.1V
V
OL
+0.1V
NOTE:
For timing purposes, a port is no longer floating when a 100mV change from load voltage occurs, and begins to float when a 100mV change
from the loaded V
OH
/V
OL
level occurs. I
OH
/I
OL
20mA.
Figure 10. Float Waveform
TIMING
REFERENCE
POINTS
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