Toshiba H1 Series Data Book page 371

3.16.1.2 Example
USB host
USB host
USB
Connector
GND
VBUS
R8
R9
If using USB controller in TMP92CZ26A, above setting is needed.
1) Pull-up of D
・ In the USB standard, in Full Speed connection, D
And this pull-up is needed ON/OFF control by S/W.
Recommendation value: R1=1.5kΩ
2) Add cascade resistor of D
・ In the USB standard, in D+, D
signal. Recommendation value : R2=27Ω, R3=27Ω
3) Flow current provision of the Connector connection and D
+
・ In D , D
when not using (it is not connect to host). In this case, it is showed that method of
controlling the pull-down resistor for fixed level by using detection signal of
connector connection.
Recommendation value: R4=10kΩ, R5=10kΩ
・ It is showed as example of the connector connection detection that method of
detecting by using VBUS (5V voltage).
Note: If rising of waveform is solw, recommned that likely baffering for waveform.
Recommendation value: R6=60kΩ, R7=100kΩ
(VBUS reducing current when suspend<500μA)
4) Connect oscillator of 10MHz to X1,X2, or input 48MHz clock to X1USB
・ If using USB by using the combination external 10MHz oscillator and internal,
Stage of external hub which can be used is restricted by the precision of internal
(Max 3 stages).
・ If 5 stages connection is needed for external hub, it is needed that input 48MHz
clock from X1USB pin (Restriction ≤±2500ppm.)
5) HOST side pull-down resistor
・ In the USB regulation, set pull-down D
Recommendation value: R8=15kΩ, R9=15kΩ
Note: Above connection and resistor etc, is example. Operation is not guranteed. Please confirm the
newest USB standar and the operation on your setting.
USB
Connector
R6
R7
USB
cable
R1
R4
OFF at
"H"
+
pin
+ -
, D signal
-
pin of TMP92CZ26A, level must be fixed for flow current provision
92CZ26A-368
USB device
VCC
VSS
INTx (detect rising)
PorTXX
D+
R2
D−
R3
R5
OFF at
"H"
+
pin must be set to pull-up.
-
signal, cascade resistor must be added to each
+ -
pin and D signal at USB_HOST side.
TMP92CZ26A
TMP92CZ26A
X1
X2
10MHz
X1USB
+ -
pin, D pin
48MHz