TMS370CX2X Datasheet, PDF (52/60 Pages) Texas Instruments – 8-BIT MICROCONTROLLER

TMS370Cx2x
8-BIT MICROCONTROLLER
SPNS018C – FEBRUARY 1993 – REVISED FEBRUARY 1997
SCI1 isosynchronous^† mode timing characteristics and requirements for external clock
(see Note 12 and Figure 27)
NO.
31 tc(SCC)
Cycle time, SCICLK
32 tw(SCCL)
Pulse duration, SCICLK low
33 tw(SCCH)
Pulse duration, SCICLK high
34 td(SCCL-TXDV) Delay time, SCITXD valid after SCICLK low
35 tv(SCCH-TXD)
Valid time, SCITXD data valid after SCICLK high
36 tsu(RXD-SCCH) Setup time, SCIRXD to SCICLK high
37 tv(SCCH-RXD)
Valid time, SCIRXD data after SCICLK high
NOTE 12: tc = system-clock cycle time = 1 / SYSCLK
31
MIN
10tc
4.25tc + 120
tc + 120
tw(SCCH)
40
2tc
MAX
4.25tc + 145
UNIT
ns
ns
ns
ns
ns
ns
ns
33
32
SCICLK
SCITXD
SCIRXD
35
34
Data Valid
36
37
Data Valid
Figure 27. SCI1 Isosynchronous^† Timing for External Clock
† _{Isosynchronous = Isochronous}
52
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251–1443