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TMS370 Datasheet(PDF) 44 Page - Texas Instruments

Part # TMS370
Description  8-BIT MICROCONTROLLER
PDF  49 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS370 Datasheet(HTML) 44 Page - Texas Instruments

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TMS370Cx0x
8-BIT MICROCONTROLLER
SPNS029C – SEPTEMBER 1995 – REVISED FEBRUARY 1997
44
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
switching characteristics and timing requirements (see Note 12 and Figure 21)
NO.
PARAMETER
MIN
MAX
UNIT
5
t
Cycle time SYSCLK (system clock)
Divide-by-4
200
2 000
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 12: tc = system-clock cycle time = 1 / SYSCLK
SYSCLK
5
6
7
Figure 21. SYSCLK Timing
general purpose output signal switching time requirements (see Figure 22)
MIN
NOM
MAX
UNIT
tr
Rise time
30
ns
tf
Fall time
30
ns
tf
tr
Figure 22. Signal Switching Time
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 operating frequency
Divide-by-4
0.5
5
MHz
SYSCLK
System clock operating frequency
Divide-by-1
2
5
MHz
recommended EPROM timing requirements for programming
MIN
NOM
MAX
UNIT
tw(EPGM)
Pulse duration, programming signal (see Note 13)
0.40
0.50
3
ms
NOTE 13: Programming pulse is active when both EXE (EPCTL.0) and VPPS (EPCTL.6) are set.



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