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Oki Semiconductor
Contents
Description................................................................................................................................................................ 1
Features .....................................................................................................................................................................1
Signal Descriptions ..................................................................................................................................................5
Functional Description ............................................................................................................................................8
Serial Interface Engine ......................................................................................................................................8
Core Controller ..................................................................................................................................................8
Repeater ..............................................................................................................................................................8
Port State Machine .............................................................................................................................................8
Descriptors ..........................................................................................................................................................8
FIFO Control .......................................................................................................................................................9
USB Interface ......................................................................................................................................................9
Glossary ...................................................................................................................................................................10
Appendix .................................................................................................................................................................11
1
Oki Semiconductor
W722 USB Hub/Compound Device Controller
0.5
m Technology Megamacro Function
DESCRIPTION
Oki's W722 Universal Serial Bus (USB) Hub/Compound Device Controller Megamacro Function is a
featured element in Oki's 0.5 m Sea of Gates (SOG) and Customer Structured Array (CSA) families.
The W722 provides Oki's Serial Interface Engine (SIE), a Hub Core Controller (HCC), a Hub Repeater
(HR), and a status/descriptor/register file block in four highly integrated submodules. The submodule
partitioning allows custom configurations to be easily developed. Oki also offers optional USB FIFO
Controller and Application Interface Logic Modules to form a USB Compound Device function.
FEATURES
Supported ASIC Families
Family Name
Family Type
MSM13R0000
Sea of Gates
MSM98R000
Customer Structured Array
Recommended Operating Conditions (V
SS
= 0 V)
Parameter
Symbol
Min.
Typical
Max.
Unit
Power supply voltage
V
DD
2.7
3.3
3.6
V
Operating temperature
T
j
-40
+25
+85
C
Megamacro Function Characteristics
Megamacro Function
Description
Logic Gate Count
Logic Pin Count
W722
USB Hub/Compound Device Controller
15K
[1]
1.
The hub controller has 15K gates, with an additional 12K gates for the optional embedded function, FIFO control, and application interface logic.
154
[2]
2.
Pin count is based on three downstream ports and one embedded function.
USB v1.0 compliant.
Supports up to four downstream ports
(expandable).
Can replace external downstream ports with
internal ports to interface with embedded
functions.
Supports any combination of low-speed (1.5
Mbps) and full-speed (12 Mbps) downstream
ports.
Hub function supports one control endpoint
and one interrupt endpoint.
Embedded function supports 1 control end
point and 6 additional endpoint addresses,
expandable up to 32 endpoint addresses.
Auto-sensing capability for power sources can
behave as either a self-powered or bus-
powered hub.
Individual port power switching capability for
bus-powered hubs.
Individual port over-current protection
mechanism and individual port over-current
indicator for self-powered hubs.
Supports remote-wakeup feature initiated by
the hub itself, the embedded function, or the
downstream devices.
Built-in (dynamic phase-locked loop (DPLL);
interface for optional external DPLL.
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W722 USB Hub/Compound Device Controller
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2
Oki Semiconductor
Figure 1. W722 Logic Symbol
Figure 2. W722 Block Diagram
usb_dpin
usb_dmin
usb_rxd
usb_dpout
usb_dmout
usb_txenb
full_spden
sel_ext_pll
sys_clock
[7:0]ma
[7:0]md
mrdyb
[7:0]pd
[3:0]pkt_rdy
setup_rdy
[7:0]trx_out_data
[7:0]rcv_out_data
[7:0]trx_in_data
[2:0]trx_sel
[8:0]trx_wr_ptr
[6:0]trx_wrb
[7:0]rcv_in_data
[2:0]rcv_sel
[6:0]rcv_wrb
Embedded Function
FIFO Interface
USB Interface
Embedded Function
Application Interface
W722
sys_reset
testmode
mwr_rdb
iso_err
usb_reset
validsof
[8:0]trx_rd_ptr
[8:0]rcv_wr_ptr
[8:0]rcv_rd_ptr
osc_clk
usb_clk_ext
usb_rxd_out
DPLL Interface (optional)
Optional Hardware
Control or Customer's
_Controller Interface
Hub_Core Controller
(HCC)
Oki Serial Interface Engine
(SIE)
Hub Repeater
(HR)
Descriptors/Status/
Register File
To USB Transceiver
To USB Trnasceivers
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