HD404849 Datasheet, PDF (122/125 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404849 Series
SCK
t _SCKf
V_CC – 2.0 V (0.9V_CC )*
0.4 V (0.1V_CC)*
t _DSO
SO
SI
t _Scyc
t _SCKL
t _SCKr
t _SCKH
V_CC – 0.5 V
0.4 V
t _SSI
t _HSI
0.9V _CC
0.1V_CC
Note: * V_CC – 2.0 V and 0.4 V are the threshold voltages for transmit clock output, and
0.9V_CC and 0.1V_CC are the threshold voltages for transmit clock input.
Figure 99 Serial Interface Timing
Test
point
C=
30 pF
V_CC
R_L = 2.6 kΩ
R=
12 kΩ
1S2074 H
or equivalent
Figure 100 Timing Load Circuit
122