ISP1362
Single-chip USB OTG controller
Philips Semiconductors
Table 23: OtgControl register: bit description…continued
Bit
Symbol
Description
4
LOC_
CONN
0 — disconnect the on-chip pull-up resistor on DP of the OTG port
1 — connect the on-chip pull-up resistor on DP of the OTG port
This bit is for the A-device only. This bit is used to choose the power
3
SEL_CP_
EXT
source to drive VBUS
.
0 — use on-chip charge pump to drive VBUS
1 — use external power source (+5 V) to drive VBUS
Remark: When using the external power source, the H_PSW1 pin
serves as the power switch that is controlled by the DRV_VBUS bit of
this register.
2
DISCHRG_ This bit is for the B-device only. If set, it will enable a pull-down
VBUS
resistor on VBUS, which will help to speed up discharging of VBUS
below session end threshold voltage.
0 — disable
1 — enable
1
0
CHRG_
VBUS
This bit is for the B-device only. If set, it will charge VBUS through a
resistor.
0 — disable charging VBUS of the OTG port
1 — enable charging VBUS of the OTG port
DRV_VBUS This bit is used to enable the on-chip charge pump or external power
source to drive VBUS. For the B-device, it shall not enable this bit at
any time.
0 — disable driving VBUS of the OTG port
1 — enable driving VBUS of the OTG port
14.2 OtgStatus register (R: 67H)
Code (Hex): 67 — read only
Table 24: OtgStatus register: bit allocation
Bit
15
14
13
12
11
10
9
8
Symbol
Reset
Access
Bit
reserved
SE0_2MS
reserved
-
-
-
-
-
-
-
-
-
-
-
-
0
R
1
-
-
0
7
6
5
4
3
2
Symbol
reserved
RMT_
CONN
B_SESS_
VLD
A_SESS_
VLD
B_SESS_
END
A_VBUS_
VLD
ID_REG
Reset
-
-
-
-
0
0
0
1
0
1
Access
R
R
R
R
R
R
9397 750 12337
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data
Rev. 03 — 06 January 2004
62 of 150
NXP [ NXP ]
