JDP2S01T Datasheet, PDF (37/150 Pages) Toshiba Semiconductor – UHF~VHF Band RF Attenuator Applications

Philips Semiconductors
ISP1362
Single-chip USB OTG controller
9397 750 12337
Product data
START
id/ |
b_sess_vld/
b_idle
drv_vbus/
chrg_vbus/
loc_conn/
loc_sof/
b_host
chrg_vbus/
loc_conn/
loc_sof
id/ |
b_sess_vld/
id/ |
b_sess_vld/
a_idle
drv_vbus/
chrg_vbus/
id/
loc_conn/
loc_sof/
b_bus_req &
b_sess_end &
b_se0_srp
id/ |
b_srp_done
b_srp_init
pulse loc_conn
pulse chrg_vbus
loc_sof/
a_conn
b_bus_req/ |
a_conn/
b_sess_vld
b_wait_acon
chrg_vbus/
loc_conn/
loc_sof/
a_bus_resume |
b_ase0_brst_tmout
b_bus_req &
b_hnp_en &
a_bus_suspend
Fig 19. Dual-role B-device state diagram.
b_peripheral
chrg_vbus/
loc_conn
loc_sof/
004aaa078
11.4.3 HNP implementation and OTG state machine
The OTG state machine is the software behind all the OTG functionality. It is
implemented in the microprocessor system that is connected to the ISP1362. The
ISP1362 provides all input status, the output control and timers to fully support the
state machine transitions in Figure 18 and Figure 19.
These registers include:
• OtgControl register: provides control to V_BUS driving, charging or discharging, data
line pull-up or pull-down, SRP detection, and so on
• OtgStatus register: provides status detection on V_BUS and data lines including ID,
V_BUS session valid, session end, overcurrent, bus status
• OtgInterrupt register: provides interrupts for status change in OtgStatus register
bits and the OtgTimer time-out event
• OtgInterruptEnable register: provides interrupt mask for OtgInterrupt register bits
• OtgTimer register: provides 0.01 ms base programmable timer for use in the OTG
state machine.
The OTG interrupt is generated on the INT1 pin. It is shared with the HC interrupt. To
enable the OTG interrupt, perform these steps:
1. Set the polarity and the level-triggering or edge-triggering mode of the
HcHardwareConfiguration register (bits 1 and 2, default is level-triggered, active
LOW).
Rev. 03 — 06 January 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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