Datasheet

Analog Integrated Circuit Device Data
Freescale Semiconductor 136
MC34708
Functional Block Description
SWITCH_OPEN 3 R/W MUSBRSTB 0x1
Switch connection selection
0: Open all switches
1: Switch selection according to the Manual S/W bit.
RESET 4 RWM MUSBRSTB 0x0
Soft reset. When written to 1, the IC is reset. Once the reset
is complete, the RST bit is set and the RESET bit is cleared
automatically.
1: to soft-reset the IC
TTY_SPKL 5 R/W MUSBRSTB 0x0
SPK_L to DM switch control
0: Turn off the SPK_L to DM switch
1: Turn on the SPK_L to DM switch for TTY
RST 6 R/C MUSBRSTB X
This bit indicates if a chip reset has occurred. This bit will be
cleared once being read.
0: no.
1: Yes.
ACTIVE 7 R/W MUSBRSTB X
Indicate either the device is in Active mode
0: Standby
1: Active
CLK_RST 8 R/C MUSBRST 0x1
Not available
VOTGEN 9 R/W RESETB 0x0
Enables the OTG switch and the GOTG switch
Unused 10 R 0x0
Not available
Reserved 11 R NONE 0x0
Reserved
SWHOLD 12 R/W MUSBRSTB 0x1
Switch Hold
0: Run state machine and allow detection of accessory
1: Holds off state machine until baseband comes up
Reserved 14-13 R NONE 0x0
Reserved
VBUS SWITCHING[1:0] 16-15 R/W MUSBRSTB 0x0
VBUS line switching configuration when Manual S/W = 0
00: open all switches MOTG, M0
01: N/A
10: VBUS connects to MIC. M0, MOTG.
Others: open all switches connected to the VBUS line
DP SWITCHING[2:0] 19-17 R/W MUSBRSTB 0x0
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
DM SWITCHING[2:0] 22-20 R/W MUSBRSTB 0x0
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
READVALID 23 R MUSBRSTB 0x0
Read data valid
0: Data not valid
1: Data valid
Table 144. Register 39, USB Control
Name Bit # R/W Reset Default Description