UPD784224 Datasheet, PDF (72/92 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCONTROLLERS

µPD784224, 784225, 784224Y, 784225Y
Serial Operation (TA = −40°C to +85°C, VDD = VDD0 = VDD1 = AVDD = 1.8 to 5.5 V, VSS = VSS0 = VSS1 = AVSS = 0 V)
(a) 3-wire serial I/O mode (SCK: Internal clock output)
Parameter
SCK cycle time
Symbol
tKCY1
Conditions
2.7 V ≤ VDD ≤ 5.5 V
SCK high-/low-level
tKH1,
width
tKL1
SI setup time (to SCK↑)
tSIK1
2.7 V ≤ VDD ≤ 5.5 V
2.7 V ≤ VDD ≤ 5.5 V
SI hold time (from SCK↑)
SO output delay time
(from SCK↓)
tKSI1
tKSO1
MIN. TYP. MAX. Unit
800
ns
3,200
ns
350
ns
1,500
ns
10
ns
30
ns
40
ns
30 ns
(b) 3-wire serial I/O mode (SCK: External clock input)
Parameter
SCK cycle time
Symbol
tKCY2
Conditions
2.7 V ≤ VDD ≤ 5.5 V
SCK high-/low-level
tKH2
width
tKL2
SI setup time (to SCK↑)
tSIK2
2.7 V ≤ VDD ≤ 5.5 V
2.7 V ≤ VDD ≤ 5.5 V
SI hold time (from SCK↑)
SO output delay time
(from SCK↓)
tKSI2
tKSO2
MIN. TYP. MAX. Unit
800
ns
3,200
ns
400
ns
1,600
ns
10
ns
30
ns
40
ns
30 ns
(c) UART mode
Parameter
ASCK cycle time
Symbol
tKCY3
Conditions
4.5 V ≤ VDD ≤ 5.5 V
2.7 V ≤ VDD < 4.5 V
ASCK high-/low-level
width
tKH3
4.5 V ≤ VDD ≤ 5.5 V
tKL3
2.7 V ≤ VDD < 4.5 V
MIN. TYP. MAX. Unit
417
ns
833
ns
1,667
ns
208
ns
416
ns
833
ns
72
Data Sheet U12376EJ1V0DS00