UPD784218 Datasheet, PDF (71/92 Pages) NEC – 16-/8-BIT SINGLE-CHIP MICROCONTROLLERS

µPD784218, 784218Y
Serial Operation (TA = –40 to +85°C, VDD = AVDD = 2.2 to 5.5 V, VSS = AVSS = 0 V)
(a) 3-wire serial I/O mode (SCK: internal clock output)
Parameter
SCK cycle time
SCK high-/low-level width
SI setup time (to SCK↑)
SI hold time (from SCK↑)
SO output delay time
(from SCK↓)
Symbol
Conditions
tKCY1
2.7 V ≤ VDD ≤ 5.5 V
tKH1,
tKL1
tSIK1
2.7 V ≤ VDD ≤ 5.5 V
2.7 V ≤ VDD ≤ 5.5 V
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
Conditions
tKCY2
2.7 V ≤ VDD ≤ 5.5 V
SCK high-/low-level width
SI setup time (to SCK↑)
tKH2,
tKL2
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
Conditions
tKCY3
4.5 V ≤ VDD ≤ 5.5 V
2.7 V ≤ VDD < 4.5 V
ASCK high-/low-level width
tKH3,
tKL3
4.5 V ≤ VDD ≤ 5.5 V
2.7 V ≤ VDD < 4.5 V
MIN. TYP. MAX. Unit
417
ns
833
ns
1,667
ns
208
ns
416
ns
833
ns
Data Sheet U12304EJ2V0DS00
71