TMS370CX1X_15 Datasheet, PDF (42/52 Pages) Texas Instruments – 8-BIT MICROCONTROLLER

TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F -- MAY 1987 -- REVISED FEBRUARY 1997
switching characteristics and timing requirements (see Note 12 and Figure 21)
NO.
PARAMETER
5 t_c
Cycle time, SYSCLK
6
t_w(SCL)
Pulse duration, SYSCLK low
7
t_w(SCH)
Pulse duration, SYSCLK high
NOTE 12: t_c = system-clock cycle time = 1/SYSCLK
Divide by 4
Divide by 1
MIN
200
200
0.5 t_c--20
0.5 t_c
MAX
2000
500
0.5 t_c
0.5 t_c + 20
UNIT
ns
ns
ns
SYSCLK
5
7
6
Figure 21. SYSCLK Timing
general purpose output signal switching time requirements (see Figure 22)
t_r Rise time
t_f Fall time
MIN NOM MAX UNIT
30
ns
30
ns
t_r
t_f
Figure 22. Signal Switching Timing
recommended EEPROM timing requirements for programming
t_w(PGM)B
t_w(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
V_CC
V_PP
I_PP
SYSCLK
Supply voltage
Supply voltage at MC pin
Supply current at MC pin during programming (V_PP = 13 V)
System clock
Divide by 4
Divide by 1
recommended EPROM timing requirements for programming
t_w(EPGM)
Pulse duration, programming signal (see Note 13)
NOTE 13: Programming pulse is active when both EXE (EPCTL.0) and V_PPS (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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