µPD178023, 178024
(b) Serial interface (SIO3)
(i) 3-wire serial I/O mode (SCK3 ... internal clock output)
Parameter
SCK3 cycle time
Symbol
Test Conditions
MIN.
800
TYP.
MAX.
Unit
ns
tKCY1
SCK3 high/low-level width
tKH1,
tKL1
tKCY1/2 – 50
ns
SI3 setup time (to SCK3↑)
SI3 hold time (from SCK3↑)
SCK3↓→ SO3 output delay time
tSIK1
tKSI1
tKSO1
100
400
ns
ns
ns
C = 100 pF Note
300
Note C is the load capacitance of SCK3 and SO3 output line.
(ii) 3-wire serial I/O mode (SCK3 ... external clock input)
Parameter
SCK3 cycle time
Symbol
Test Conditions
MIN.
800
400
TYP.
MAX.
Unit
ns
tKCY2
SCK3 high/low-level width
tKH2,
tKL2
ns
SI3 setup time (to SCK3↑)
SI3 hold time (from SCK3↑)
SCK3↓→ SO3 output delay time
tSIK2
tKSI2
tKSO2
100
400
ns
ns
ns
ns
C = 100 pF Note
300
SCK3 at rising or falling edge time tR2, tF2
1000
Note C is the load capacitance of SO3 output line.
(d) Serial interface (UART0: Dedicated baud rate generator output)
Parameter
Transfer rate
Symbol
Test Conditions
MIN.
TYP.
MAX.
Unit
bps
38400
40
Data Sheet U14126EJ1V0DS00
NEC [ NEC ]
