Electronics America Single-Chip Microcontrollers User's Manual

CHAPTER 22 ELECTRICAL SPECIFICATIONS ( µ PD789488, 78F9488, 789489, 78F9489)
354 User’s Manual U15331EJ4V1UD
(d) UART mode (external clock input)
Parameter Symbol Conditions MIN. TYP. MAX. Unit
VDD = 2.7 to 5.5 V 800 ns ASCK20 cycle time tKCY3
V
DD = 1.8 to 5.5 V 3200 ns
VDD = 2.7 to 5.5 V 400 ns ASCK20 high-/low-level
width
tKH3,
t
KL3
V
DD = 1.8 to 5.5 V 1600 ns
VDD = 2.7 to 5.5 V 39063 bps Transfer rate
V
DD = 1.8 to 5.5 V 9766 bps
ASCK20 rise/fall time tR,
t
F
1
µ s