38K0 Datasheet, PDF (121/133 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

38K0 Group (L Ver.)
Table 29 Switching characteristics (USB ports) (VCC = 3.00 to 5.25 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)
Symbol
tfr(D+/D-)
Parameter
USB full-speed output rising time
CL = 50 pF
Limits
Unit
Min.
Typ.
Max.
4
20
ns
tff(D+/D-)
USB full-speed output rising time
CL = 50 pF
4
20
ns
tfrfm(D+/D-)
USB full-speed ports rising/falling ratio tfr(D+/D-)/tff(D+/D-)
90
111.11
%
Vcrs(D+/D-)
USB output signal cross-over voltage
1.3
2.0
V
Measured output pin
RL = 27 Ω
RL = 15 kΩ
CL
USB port output
TrON
RL = 27 Ω
Measured output pin
RL = 1.5 kΩ
RL = 15 kΩ
CL
USB port output
Fig. 139 USB output switching characteristics measurement circuit
(1) for D0-
Fig. 140 USB output switching characteristics measurement circuit
(2) for D0+
Rev.3.00 Oct 05, 2006 page 121 of 129
REJ03B0192-0300