GMS87C4060 Datasheet, PDF (70/102 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS81C4040/87C4060
PRELIMINARY
when ESO(ICCRbit3)is‘1’
ICSR write signal
(I²C status reg.)
SCL
SDA
BB (Bus busy) flag
t_SETUP
t_HOLD
t_BB
t_SETUP : Setup time
t_HOLD : Hold time
t_BB : Set time for BB
START / STOP condition detect
START / STOP condition is detected when Table 18-4 is
satisfied.
SCL
SDA (START)
SDA (STOP)
SCL release time
t_SETUP
t_HOLD
Figure 18-9 STOP condition generating timing diagram
START / STOP condition generation time is shown Table
18-4.
ITEM
Setup time
( t_SETUP )
Hold time
( t_HOLD )
Set/Reset time for
BB flag ( t_BB )
Timing SPEC.
3.3uS (n=20cycles)
3.3uS (n=20cycles)
3.0uS (n=18cycles)
Table 18-4 Example time ( f_ex=12MHz )
t_SETUP : Setup time
t_HOLD : Hold time
Figure 18-10 START / STOP condition detection timing
START / STOP detection time is showed Table 18-5.
ITEM
SCL release time
Setup time
Hold time
Timing SPEC.
> 2.0uS (n=12cycles)
> 1.0uS (n=6cycles)
> 1.0uS (n=6cycles)
Table 18-5 Example time ( f_ex=12MHz )
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PRELIMINARY
Nov. 1999 Ver 1.0