
Analog Integrated Circuit Device Data
Freescale Semiconductor
169
PC34708
Functional Block Requirements and Behaviors
Control Interface SPI/I2C Block Description and Application Information
ACTIVE
7
R/W
MUSBRSTB
Indicate either the device is in Active mode
0: Standby
1: Active
CLK_RST
8
R/C
MUSBRST
1
Not available
VOTGEN
9
R/W
RESETB
0
Enables the OTG switch and the GOTG switch
Unused
10
R
0
Not available
MUSBCHARG
11
R/W
MUSBRSTB
0
Manual override for USB buck charger input current limit.
With MUSBCHARG=1. the MUSBCHRG[1:0] SPI bits
have control over the buck charger input current limit.
SWHOLD
12
R/W
MUSBRSTB
1
Switch Hold
0: Run state machine and allow detection of accessory
1: Holds off state machine until baseband comes up
MUSBCHRG0
13
R/W
MUSBRSTB
0
Controls the buck charger input current limit when
Manual S/W = 0
[00] = Buck disabled
[01] = 100 mA
[10] = 500 mA
[11] = 950 mA
MUSBCHRG1
14
R/W
MUSBRSTB
0
VBUS
SWITCHING0
15
R/W
MUSBRSTB
0
VBUS line switching configuration when Manual S/W = 0
00: open all switches MVBUS, MPD, MOTG, M0
01: MVBUS switch closed, MPD switch open
10: VBUS connects to MIC. M0, MOTG, MVBUS
switches open, MPD switch closed
Others: open all switches connected to the VBUS line
VBUS
SWITCHING1
16
R/W
MUSBRSTB
0
DP
SWITCHING0
17
R/W
MUSBRSTB
0
DP line switching configuration when Manual S/W = 0
000: open all switches
001: DP connected to D+, DM connected to D-
010: DP connected to SPK_R, DM connected to SPK_L
011: DP connected to RxD, DM connected to TxD
Others: open all switches connected to the DP pin and
DM pin
DP
SWITCHING1
18
R/W
MUSBRSTB
0
DP
SWITCHING2
19
R/W
MUSBRSTB
0
DM
SWITCHING0
20
R/W
MUSBRSTB
0
DM line switching configuration when Manual S/W = 0
000: open all switches
001: DP connected to D+, DM connected to D-
010: DP connected to SPK_R, DM connected to SPK_L
011: DP connected to RxD, DM connected to TxD
Others: open all switches connected to the DP pin and
DM pin
DM
SWITCHING1
21
R/W
MUSBRSTB
0
DM
SWITCHING2
22
R/W
MUSBRSTB
0
READVALID
23
R
MUSBRSTB
0
Read data valid
0: Data not valid
1: Data valid
Table 164. Register 39, USB Control
Name
Bit #
R/W
Reset
Default
Description