TMS370CX0X_05 Datasheet, PDF (44/50 Pages) Texas Instruments – 8-BIT MICROCONTROLLER

TMS370Cx0x
8-BIT MICROCONTROLLER
SPNS029C – SEPTEMBER 1995 – REVISED FEBRUARY 1997
switching characteristics and timing requirements (see Note 12 and Figure 21)
NO.
PARAMETER
5 tc
Cycle time, SYSCLK (system clock)
6 tw(SCL)
Pulse duration, SYSCLK low
7 tw(SCH)
Pulse duration, SYSCLK high
NOTE 12: tc = system-clock cycle time = 1 / SYSCLK
Divide-by-4
Divide-by-1
MIN
200
200
0.5 tc–20
0.5 tc
MAX
2 000
500
0.5 tc
0.5 tc + 20
UNIT
ns
ns
ns
SYSCLK
5
7
6
Figure 21. SYSCLK Timing
general purpose output signal switching time requirements (see Figure 22)
tr Rise time
tf Fall time
MIN NOM MAX UNIT
30
ns
30
ns
tr
tf
Figure 22. Signal Switching Time
recommended EEPROM timing requirements for programming
tw(PGM)B
tw(PGM)AR
Pulse duration, programming signal to ensure valid data is stored (byte mode)
Pulse duration, programming signal to ensure valid data is stored (array mode)
recommended EPROM operating conditions for programming
VCC
VPP
IPP
SYSCLK
Supply voltage
Supply voltage at MC pin
Supply current at MC pin during programming (VPP = 13 V)
System clock operating frequency
Divide-by-4
Divide-by-1
recommended EPROM timing requirements for programming
tw(EPGM) Pulse duration, programming signal (see Note 13)
NOTE 13: Programming pulse is active when both EXE (EPCTL.0) and VPPS (EPCTL.6) are set.
MIN MAX UNIT
10
ms
20
ms
MIN NOM MAX UNIT
4.75 5.5
6V
13 13.2 13.5 V
30
50 mA
0.5
5
MHz
2
5
MIN NOM MAX UNIT
0.40 0.50
3 ms
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