HD6417705F133V Datasheet, PDF (721/741 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

USB crystal
oscillator
V_CC
V_CCmin
t_UOSC
State oscillation
Figure 25.52 Oscillation Settling Time when USB Crystal Oscillator Is Turned On
25.3.13 USB Transceiver Timing
Table 25.15 USB Transceiver Timing
(Conditions: VCCQ = VCC-RTC = VCC-USB = 3.0 to 3.6 V, VCC = VCC-PLL1 = VCC-PLL2 = 1.4 to
1.6 V, AVCC = 3.0 to 3.6 V, VSSQ = VSS = VSS-RTC = VSS-USB = VSS-PLL1 = VSS-PLL2 =
AVS = 0 V, Ta = –20 to 75°C)
Measurement
Item
Symbol Min
Typ
Max
Unit
Condition
Rising time
tr
4
—
Falling time
tf
4
—
Rising/falling time ratio tr / tf
90
—
Output signal crossover VCRS
1.3
—
voltage
20
ns
20
ns
110
%
2.0
V
CL = 50pF
CL = 50pF
CL = 50pF
Note: This transceiver complies with the full-speed specifications.
t_r, t_f
DP
90%
Crossover voltage
10%
DM
Measurement circuit
Vcc-USB
Vcc
RL = 1.5kΩ
DP
RS = 33Ω
Measured
element
RL = 15kΩ
DM
RS = 33Ω
RL = 15kΩ
CL
1. t_r and t_f are judged by the time taken for the
transitions between 10% and 90% amplitude.
2. The electrostatic capacitance, C_L, includes the
floating capacitance of the wiring connection
CL _{and the input capacitance of the probe.}
VSS
Rev. 2.00, 09/03, page 673 of 690