NEC 78K0 User Manual page 543

CHAPTER 30 ELECTRICAL SPECIFICATIONS (STANDARD PRODUCTS, (A) GRADE PRODUCTS)
(3) Serial interface
= −40 to +85°C, 2.7 V ≤ V
(T
A
(a) UART mode (UART6, dedicated baud rate generator output)
Parameter
Transfer rate
(b) UART mode (UART0, dedicated baud rate generator output)
Parameter
Transfer rate
(c) 3-wire serial I/O mode (master mode, SCK1n... internal clock output)
Parameter
SCK1n cycle time
SCK1n high-/low-level width
SI1n setup time (to SCK1n↑)
SI1n hold time (from SCK1n↑)
Delay time from SCK1n↓ to
SO1n output
Note C is the load capacitance of the SCK1n and SO1n output lines.
(d) 3-wire serial I/O mode (slave mode, SCK1n... external clock input)
Parameter
SCK1n cycle time
SCK1n high-/low-level width
SI1n setup time (to SCK1n↑)
SI1n hold time (from SCK1n↑)
Delay time from SCK1n↓ to
SO1n output
Note C is the load capacitance of the SO1n output line.
µ
Remark n = 0: PD780143, 780144, 780143(A), 780144(A)
µ
n = 0, 1: PD780146, 780148, 78F0148, 780146(A), 780148(A), 78F0148(A)
≤ 5.5 V, 2.7 V ≤ AV
= EV
DD DD
Symbol Conditions
Symbol Conditions
Symbol Conditions
4.0 V ≤ V ≤ 5.5 V
t
KCY1 DD
3.3 V ≤ V
< 4.0 V
DD
2.7 V ≤ V
< 3.3 V
DD
t ,
KH1
t
KL1
t
SIK1
t
KSI1
Note
t C = 100 pF
KSO1
*
Symbol Conditions
t
KCY2
t ,
KH2
t
KL2
t
SIK2
t
KSI2
Note
t C = 100 pF
KSO2
User's Manual U15947EJ2V0UD
≤ V
, V = EV = AV
REF DD SS SS
MIN. TYP.
MIN. TYP.
MIN. TYP.
200
240
400
/2 − 10
t
KCY1
30
30
MIN. TYP.
400
t /2
KCY2
80
50
= 0 V)
SS
MAX. Unit
312.5 kbps
MAX. Unit
312.5 kbps
MAX. Unit
ns
ns
ns
ns
ns
ns
30 ns
MAX. Unit
ns
ns
ns
ns
120 ns
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