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TMS77C82 Datasheet(PDF) 38 Page - Texas Instruments

Part # TMS77C82
Description  8-BIT MICROCONTROLLER
PDF  43 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS77C82 Datasheet(HTML) 38 Page - Texas Instruments

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TMS370Cx32
8-BIT MICROCONTROLLER
SPNS015C – FEBRUARY 1990 – REVISED FEBRUARY 1997
38
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
switching characteristics and timing requirements (see Note 10 and Figure 16)
NO.
PARAMETER
MIN
MAX
UNIT
5
t
Cycle time SYSCLK (system clock)
Divide-by-4
200
2000
ns
5
tc
Cycle time, SYSCLK (system clock)
Divide-by-1
200
500
ns
6
tw(SCL)
Pulse duration, SYSCLK low
0.5 tc–20
0.5 tc
ns
7
tw(SCH)
Pulse duration, SYSCLK high
0.5 tc
0.5 tc + 20
ns
NOTE 10:
tc = system clock cycle time = 1 /SYSCLK
SYSCLK
5
6
7
Figure 16. SYSCLK Timing
general purpose output signal switching time requirements (see Figure 17)
MIN
NOM
MAX
UNIT
tr
Rise time
30
ns
tf
Fall time
30
ns
tf
tr
Figure 17. Signal Switching Timing
recommended EEPROM timing requirements for programming
MIN
MAX
UNIT
tw(PGM)B
Pulse duration, programming signal to ensure valid data is stored (byte mode)
10
ms
tw(PGM)AR
Pulse duration, programming signal to ensure valid data is stored (array mode)
20
ms
recommended EPROM operating conditions for programming
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.75
5.5
6
V
VPP
Supply voltage at MC pin
13
13.2
13.5
V
IPP
Supply current at MC pin during programming (VPP = 13 V)
30
50
mA
SYSCLK
System clock
Divide-by-4
0.5
5
MHz
SYSCLK
System clock
Divide-by-1
2
5
MHz
recommended EPROM timing requirements for programming
MIN
NOM
MAX
UNIT
tw(EPGM)
Pulse duration, programming signal (see Note 11)
0.40
0.50
3
ms
NOTE 11: Programming pulse is active when both EXE (EPCTL.0) and VPPS (EPCTL.6) are set.



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