TS80C54 ATMEL [ATMEL Corporation], TS80C54 Datasheet - Page 56
TS80C54
Manufacturer Part Number
TS80C54
Description
8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.TS80C54.pdf
(62 pages)
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19.5.13
19.5.14
19.5.15
56
AT/TS8xC54/8X2
AC Testing Input/Output Waveforms
Float Waveforms
Clock Waveforms
I N P U T / O U T P U T
Figure 19-12. AC Testing Input/Output Waveforms
AC inputs during testing are driven at V
measurement are made at V
Figure 19-13. Float Waveforms
For timing purposes a port pin is no longer floating when a 100 mV change from load voltage
occurs and begins to float when a 100 mV change from the loaded V
≥ ± 20mA.
Valid in normal clock mode. In X2 mode XTAL2 signal must be changed to XTAL2 divided by
two.
V
C C
0 . 4 5 V
- 0 . 5 V
V
V
O H
O L
- 0 . 1 V
+ 0 . 1 V
F L O A T
V
L O A D
IH
min for a logic “1” and V
0 . 2 V
0 . 2 V
C C
C C
CC
+ 0 . 9
- 0 . 1
- 0.5 for a logic “1” and 0.45V for a logic “0”. Timing
V
V
L O A D
L O A D
+ 0 . 1 V
- 0 . 1 V
IL
max for a logic “0”.
OH
/V
OL
level occurs. I
4431E–8051–04/06
OL
/I
OH
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